./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe004_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:18:51,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:18:51,948 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:18:51,952 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:18:51,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:18:51,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:18:51,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:18:51,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:18:51,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:18:51,980 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:18:51,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:18:51,981 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:18:51,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:18:51,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:18:51,983 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:18:51,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:18:51,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:18:51,983 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:18:51,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:18:51,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:18:51,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:18:51,984 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:18:51,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:18:51,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:18:51,985 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:18:51,985 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:18:51,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:18:51,986 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:18:51,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:18:51,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:18:51,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:18:51,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:18:51,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:18:51,988 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:18:51,988 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:18:51,988 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:18:51,988 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:18:51,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:18:51,988 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:18:51,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:18:51,989 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:18:51,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:18:51,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:18:51,989 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:18:52,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:18:52,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:18:52,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:18:52,285 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:18:52,286 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:18:52,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-14 11:18:53,294 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:18:53,575 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:18:53,576 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-06-14 11:18:53,599 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9987d94/ff7eb695957147b39c2ace2d76842c4e/FLAGca38289cd [2024-06-14 11:18:53,614 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9987d94/ff7eb695957147b39c2ace2d76842c4e [2024-06-14 11:18:53,616 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:18:53,617 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:18:53,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_tso.yml/witness.yml [2024-06-14 11:18:53,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:18:53,727 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:18:53,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:18:53,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:18:53,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:18:53,732 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:18:53" (1/2) ... [2024-06-14 11:18:53,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3edca70b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:53, skipping insertion in model container [2024-06-14 11:18:53,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:18:53" (1/2) ... [2024-06-14 11:18:53,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2762af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:18:53, skipping insertion in model container [2024-06-14 11:18:53,736 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:18:53" (2/2) ... [2024-06-14 11:18:53,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3edca70b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:53, skipping insertion in model container [2024-06-14 11:18:53,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:18:53" (2/2) ... [2024-06-14 11:18:53,736 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:18:53,775 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:18:53,776 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 11:18:53,776 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 11:18:53,776 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 11:18:53,777 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:18:53,777 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-14 11:18:53,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:18:54,091 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:18:54,098 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:18:54,200 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:18:54,229 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:18:54,229 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54 WrapperNode [2024-06-14 11:18:54,229 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:18:54,230 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:18:54,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:18:54,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:18:54,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,267 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 11:18:54,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:18:54,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:18:54,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:18:54,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:18:54,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,287 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:18:54,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,294 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,296 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:18:54,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:18:54,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:18:54,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:18:54,300 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (1/1) ... [2024-06-14 11:18:54,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:18:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:18:54,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:18:54,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:18:54,426 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:18:54,426 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:18:54,426 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:18:54,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:18:54,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:18:54,427 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:18:54,543 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:18:54,544 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:18:54,697 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:18:54,697 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:18:54,759 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:18:54,759 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:18:54,760 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:18:54 BoogieIcfgContainer [2024-06-14 11:18:54,760 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:18:54,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:18:54,761 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:18:54,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:18:54,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:18:53" (1/4) ... [2024-06-14 11:18:54,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508f6d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:18:54, skipping insertion in model container [2024-06-14 11:18:54,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:18:53" (2/4) ... [2024-06-14 11:18:54,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508f6d3c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:18:54, skipping insertion in model container [2024-06-14 11:18:54,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:18:54" (3/4) ... [2024-06-14 11:18:54,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@508f6d3c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:18:54, skipping insertion in model container [2024-06-14 11:18:54,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:18:54" (4/4) ... [2024-06-14 11:18:54,767 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-06-14 11:18:54,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:18:54,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:18:54,783 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:18:54,823 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:18:54,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:18:54,871 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 11:18:54,871 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:18:54,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:18:54,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:18:54,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 11:18:54,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:18:54,888 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;@2bc6114f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:18:54,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:18:54,893 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:18:54,894 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:18:54,894 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:18:54,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:54,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:18:54,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:54,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1793314465, now seen corresponding path program 1 times [2024-06-14 11:18:54,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:54,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228393856] [2024-06-14 11:18:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:54,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:55,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228393856] [2024-06-14 11:18:55,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228393856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:55,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:55,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:18:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324546081] [2024-06-14 11:18:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:55,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:18:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:18:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:18:55,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 11:18:55,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:55,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:55,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 11:18:55,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:55,575 INFO L124 PetriNetUnfolderBase]: 606/995 cut-off events. [2024-06-14 11:18:55,575 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 11:18:55,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 995 events. 606/995 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4997 event pairs, 384 based on Foata normal form. 1/944 useless extension candidates. Maximal degree in co-relation 1998. Up to 941 conditions per place. [2024-06-14 11:18:55,589 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 11:18:55,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-14 11:18:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:18:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:18:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-14 11:18:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-14 11:18:55,602 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-14 11:18:55,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-14 11:18:55,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:18:55,608 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 11:18:55,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 11:18:55,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 11:18:55,614 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 11:18:55,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:55,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:55,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:55,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:18:55,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:55,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1093279874, now seen corresponding path program 1 times [2024-06-14 11:18:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:55,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795993101] [2024-06-14 11:18:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:55,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:55,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795993101] [2024-06-14 11:18:55,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795993101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:55,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:55,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:18:55,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686446324] [2024-06-14 11:18:55,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:55,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:18:55,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:18:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:18:55,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:55,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:55,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:55,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:55,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:56,010 INFO L124 PetriNetUnfolderBase]: 934/1510 cut-off events. [2024-06-14 11:18:56,037 INFO L125 PetriNetUnfolderBase]: For 300/348 co-relation queries the response was YES. [2024-06-14 11:18:56,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 1510 events. 934/1510 cut-off events. For 300/348 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7433 event pairs, 530 based on Foata normal form. 3/1483 useless extension candidates. Maximal degree in co-relation 3413. Up to 1399 conditions per place. [2024-06-14 11:18:56,045 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:18:56,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 254 flow [2024-06-14 11:18:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:18:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:18:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 11:18:56,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-14 11:18:56,057 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-14 11:18:56,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 254 flow [2024-06-14 11:18:56,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:18:56,059 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-14 11:18:56,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 11:18:56,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 11:18:56,060 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-14 11:18:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:56,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:56,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:18:56,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:56,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash 468063438, now seen corresponding path program 1 times [2024-06-14 11:18:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:56,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918662100] [2024-06-14 11:18:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:56,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:56,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918662100] [2024-06-14 11:18:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918662100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:56,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:56,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995672413] [2024-06-14 11:18:56,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:56,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:56,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:56,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:56,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:56,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:56,384 INFO L124 PetriNetUnfolderBase]: 972/1588 cut-off events. [2024-06-14 11:18:56,385 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-06-14 11:18:56,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1588 events. 972/1588 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7840 event pairs, 304 based on Foata normal form. 7/1590 useless extension candidates. Maximal degree in co-relation 3986. Up to 1312 conditions per place. [2024-06-14 11:18:56,396 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-14 11:18:56,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 430 flow [2024-06-14 11:18:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:18:56,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-14 11:18:56,402 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:18:56,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 430 flow [2024-06-14 11:18:56,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 82 transitions, 428 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 11:18:56,407 INFO L231 Difference]: Finished difference. Result has 53 places, 55 transitions, 278 flow [2024-06-14 11:18:56,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=53, PETRI_TRANSITIONS=55} [2024-06-14 11:18:56,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-14 11:18:56,408 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 278 flow [2024-06-14 11:18:56,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:56,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:56,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:56,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:18:56,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:56,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:56,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1162563891, now seen corresponding path program 1 times [2024-06-14 11:18:56,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:56,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7209411] [2024-06-14 11:18:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:56,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7209411] [2024-06-14 11:18:56,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7209411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:56,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:56,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:56,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998241324] [2024-06-14 11:18:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:56,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:56,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:56,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 278 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:56,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:56,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:56,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:56,872 INFO L124 PetriNetUnfolderBase]: 1054/1742 cut-off events. [2024-06-14 11:18:56,872 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-14 11:18:56,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5475 conditions, 1742 events. 1054/1742 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8953 event pairs, 197 based on Foata normal form. 26/1763 useless extension candidates. Maximal degree in co-relation 5452. Up to 1290 conditions per place. [2024-06-14 11:18:56,886 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-14 11:18:56,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 582 flow [2024-06-14 11:18:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 11:18:56,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-14 11:18:56,888 INFO L175 Difference]: Start difference. First operand has 53 places, 55 transitions, 278 flow. Second operand 6 states and 160 transitions. [2024-06-14 11:18:56,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 582 flow [2024-06-14 11:18:56,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 572 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-14 11:18:56,897 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 339 flow [2024-06-14 11:18:56,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-14 11:18:56,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 11:18:56,899 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 339 flow [2024-06-14 11:18:56,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:56,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:56,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:56,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:18:56,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:56,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1976063819, now seen corresponding path program 1 times [2024-06-14 11:18:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:56,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931039339] [2024-06-14 11:18:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931039339] [2024-06-14 11:18:57,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931039339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:57,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:57,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:18:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701396751] [2024-06-14 11:18:57,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:57,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:18:57,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:57,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:18:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:18:57,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 11:18:57,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:57,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:57,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 11:18:57,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:57,186 INFO L124 PetriNetUnfolderBase]: 801/1436 cut-off events. [2024-06-14 11:18:57,186 INFO L125 PetriNetUnfolderBase]: For 2705/2739 co-relation queries the response was YES. [2024-06-14 11:18:57,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1436 events. 801/1436 cut-off events. For 2705/2739 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7887 event pairs, 231 based on Foata normal form. 4/1396 useless extension candidates. Maximal degree in co-relation 4794. Up to 1191 conditions per place. [2024-06-14 11:18:57,197 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-14 11:18:57,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 511 flow [2024-06-14 11:18:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:18:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:18:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 11:18:57,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 11:18:57,199 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 339 flow. Second operand 4 states and 102 transitions. [2024-06-14 11:18:57,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 511 flow [2024-06-14 11:18:57,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 460 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:57,204 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 354 flow [2024-06-14 11:18:57,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-06-14 11:18:57,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 11:18:57,204 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 354 flow [2024-06-14 11:18:57,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:57,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:57,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:57,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:18:57,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:57,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1129415895, now seen corresponding path program 1 times [2024-06-14 11:18:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648239090] [2024-06-14 11:18:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:57,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:57,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648239090] [2024-06-14 11:18:57,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648239090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:57,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:57,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:57,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39391588] [2024-06-14 11:18:57,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:57,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:57,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:57,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:57,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:57,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:57,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:57,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:57,501 INFO L124 PetriNetUnfolderBase]: 1050/1744 cut-off events. [2024-06-14 11:18:57,501 INFO L125 PetriNetUnfolderBase]: For 4014/4018 co-relation queries the response was YES. [2024-06-14 11:18:57,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6097 conditions, 1744 events. 1050/1744 cut-off events. For 4014/4018 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9097 event pairs, 307 based on Foata normal form. 7/1746 useless extension candidates. Maximal degree in co-relation 6070. Up to 1463 conditions per place. [2024-06-14 11:18:57,513 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 24 changer transitions 0/86 dead transitions. [2024-06-14 11:18:57,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 641 flow [2024-06-14 11:18:57,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 11:18:57,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-14 11:18:57,515 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 354 flow. Second operand 5 states and 129 transitions. [2024-06-14 11:18:57,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 641 flow [2024-06-14 11:18:57,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 608 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:57,520 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 436 flow [2024-06-14 11:18:57,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-06-14 11:18:57,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-14 11:18:57,521 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 436 flow [2024-06-14 11:18:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:57,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:57,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:57,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:18:57,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:57,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash 460366480, now seen corresponding path program 1 times [2024-06-14 11:18:57,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:57,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856784582] [2024-06-14 11:18:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:57,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:57,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856784582] [2024-06-14 11:18:57,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856784582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:57,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:57,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:57,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093248481] [2024-06-14 11:18:57,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:57,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:57,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:57,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:57,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:57,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:57,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:57,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:57,855 INFO L124 PetriNetUnfolderBase]: 1053/1744 cut-off events. [2024-06-14 11:18:57,855 INFO L125 PetriNetUnfolderBase]: For 4867/4867 co-relation queries the response was YES. [2024-06-14 11:18:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6525 conditions, 1744 events. 1053/1744 cut-off events. For 4867/4867 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8983 event pairs, 333 based on Foata normal form. 4/1744 useless extension candidates. Maximal degree in co-relation 6496. Up to 1457 conditions per place. [2024-06-14 11:18:57,868 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 60 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-14 11:18:57,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 741 flow [2024-06-14 11:18:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 11:18:57,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-14 11:18:57,870 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 436 flow. Second operand 5 states and 131 transitions. [2024-06-14 11:18:57,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 741 flow [2024-06-14 11:18:57,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 708 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 11:18:57,877 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 498 flow [2024-06-14 11:18:57,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-14 11:18:57,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-14 11:18:57,879 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 498 flow [2024-06-14 11:18:57,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:57,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:57,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:18:57,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:57,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -621774892, now seen corresponding path program 2 times [2024-06-14 11:18:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924075776] [2024-06-14 11:18:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:58,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:58,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924075776] [2024-06-14 11:18:58,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924075776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:58,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:58,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:58,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676317798] [2024-06-14 11:18:58,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:58,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:58,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:58,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:58,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:58,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:58,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:58,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:58,197 INFO L124 PetriNetUnfolderBase]: 1018/1669 cut-off events. [2024-06-14 11:18:58,198 INFO L125 PetriNetUnfolderBase]: For 5980/5984 co-relation queries the response was YES. [2024-06-14 11:18:58,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6407 conditions, 1669 events. 1018/1669 cut-off events. For 5980/5984 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8425 event pairs, 335 based on Foata normal form. 5/1669 useless extension candidates. Maximal degree in co-relation 6376. Up to 1406 conditions per place. [2024-06-14 11:18:58,216 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2024-06-14 11:18:58,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 730 flow [2024-06-14 11:18:58,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:58,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 11:18:58,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-14 11:18:58,218 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 498 flow. Second operand 5 states and 126 transitions. [2024-06-14 11:18:58,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 730 flow [2024-06-14 11:18:58,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 694 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:58,228 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 524 flow [2024-06-14 11:18:58,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-14 11:18:58,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-14 11:18:58,230 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 524 flow [2024-06-14 11:18:58,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:58,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:58,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:18:58,231 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:58,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1258070056, now seen corresponding path program 1 times [2024-06-14 11:18:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:58,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855855919] [2024-06-14 11:18:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:58,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:58,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:58,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855855919] [2024-06-14 11:18:58,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855855919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:58,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:58,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:58,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890908872] [2024-06-14 11:18:58,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:58,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:58,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:58,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:58,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:58,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:58,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:58,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:58,578 INFO L124 PetriNetUnfolderBase]: 1085/1784 cut-off events. [2024-06-14 11:18:58,579 INFO L125 PetriNetUnfolderBase]: For 7663/7667 co-relation queries the response was YES. [2024-06-14 11:18:58,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6863 conditions, 1784 events. 1085/1784 cut-off events. For 7663/7667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9179 event pairs, 299 based on Foata normal form. 25/1804 useless extension candidates. Maximal degree in co-relation 6831. Up to 1391 conditions per place. [2024-06-14 11:18:58,595 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 30 changer transitions 0/98 dead transitions. [2024-06-14 11:18:58,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 826 flow [2024-06-14 11:18:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 11:18:58,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 11:18:58,597 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 524 flow. Second operand 6 states and 151 transitions. [2024-06-14 11:18:58,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 826 flow [2024-06-14 11:18:58,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 764 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:58,607 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 559 flow [2024-06-14 11:18:58,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=559, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-14 11:18:58,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 11:18:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 559 flow [2024-06-14 11:18:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:58,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:58,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:18:58,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:58,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 61996686, now seen corresponding path program 1 times [2024-06-14 11:18:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:58,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346839936] [2024-06-14 11:18:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:58,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346839936] [2024-06-14 11:18:58,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346839936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:58,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329116713] [2024-06-14 11:18:58,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:58,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:58,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:58,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:58,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 559 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:58,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:58,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:58,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:58,898 INFO L124 PetriNetUnfolderBase]: 1096/1818 cut-off events. [2024-06-14 11:18:58,898 INFO L125 PetriNetUnfolderBase]: For 8420/8426 co-relation queries the response was YES. [2024-06-14 11:18:58,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7306 conditions, 1818 events. 1096/1818 cut-off events. For 8420/8426 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9507 event pairs, 358 based on Foata normal form. 5/1821 useless extension candidates. Maximal degree in co-relation 7273. Up to 1531 conditions per place. [2024-06-14 11:18:58,912 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-14 11:18:58,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 837 flow [2024-06-14 11:18:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 11:18:58,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 11:18:58,913 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 559 flow. Second operand 5 states and 124 transitions. [2024-06-14 11:18:58,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 837 flow [2024-06-14 11:18:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 762 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:18:58,924 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 570 flow [2024-06-14 11:18:58,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=570, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-14 11:18:58,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-14 11:18:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 570 flow [2024-06-14 11:18:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:58,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:58,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:58,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:18:58,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:58,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash 60955086, now seen corresponding path program 2 times [2024-06-14 11:18:58,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:58,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292782854] [2024-06-14 11:18:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:59,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:59,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292782854] [2024-06-14 11:18:59,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292782854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:59,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:59,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:18:59,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994014669] [2024-06-14 11:18:59,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:59,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:18:59,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:18:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:18:59,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:59,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 570 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:59,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:59,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:59,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:59,234 INFO L124 PetriNetUnfolderBase]: 1091/1803 cut-off events. [2024-06-14 11:18:59,234 INFO L125 PetriNetUnfolderBase]: For 9368/9374 co-relation queries the response was YES. [2024-06-14 11:18:59,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7250 conditions, 1803 events. 1091/1803 cut-off events. For 9368/9374 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9368 event pairs, 350 based on Foata normal form. 8/1809 useless extension candidates. Maximal degree in co-relation 7216. Up to 1526 conditions per place. [2024-06-14 11:18:59,246 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-14 11:18:59,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 94 transitions, 792 flow [2024-06-14 11:18:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:18:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:18:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 11:18:59,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:18:59,248 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 570 flow. Second operand 5 states and 125 transitions. [2024-06-14 11:18:59,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 94 transitions, 792 flow [2024-06-14 11:18:59,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 746 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:18:59,257 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 584 flow [2024-06-14 11:18:59,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 11:18:59,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 11:18:59,258 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 584 flow [2024-06-14 11:18:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:59,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:59,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:18:59,259 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:59,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591957, now seen corresponding path program 1 times [2024-06-14 11:18:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:59,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9721201] [2024-06-14 11:18:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:59,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:59,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9721201] [2024-06-14 11:18:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9721201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:59,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:59,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035671287] [2024-06-14 11:18:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:59,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:59,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:59,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:59,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:59,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:59,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:59,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:59,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:59,593 INFO L124 PetriNetUnfolderBase]: 1194/1976 cut-off events. [2024-06-14 11:18:59,593 INFO L125 PetriNetUnfolderBase]: For 11766/11766 co-relation queries the response was YES. [2024-06-14 11:18:59,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8121 conditions, 1976 events. 1194/1976 cut-off events. For 11766/11766 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10435 event pairs, 264 based on Foata normal form. 4/1975 useless extension candidates. Maximal degree in co-relation 8087. Up to 1385 conditions per place. [2024-06-14 11:18:59,606 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 33 changer transitions 0/110 dead transitions. [2024-06-14 11:18:59,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 956 flow [2024-06-14 11:18:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:18:59,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 11:18:59,608 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 584 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:18:59,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 956 flow [2024-06-14 11:18:59,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 878 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:18:59,623 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 619 flow [2024-06-14 11:18:59,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=619, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-14 11:18:59,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 11:18:59,624 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 619 flow [2024-06-14 11:18:59,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:59,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:59,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:59,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:18:59,624 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)] === [2024-06-14 11:18:59,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2129767445, now seen corresponding path program 2 times [2024-06-14 11:18:59,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:59,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977260691] [2024-06-14 11:18:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:59,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:18:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:18:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:18:59,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:18:59,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977260691] [2024-06-14 11:18:59,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977260691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:18:59,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:18:59,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:18:59,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4815403] [2024-06-14 11:18:59,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:18:59,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:18:59,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:18:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:18:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:18:59,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:18:59,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 619 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:59,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:18:59,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:18:59,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:18:59,954 INFO L124 PetriNetUnfolderBase]: 1186/1954 cut-off events. [2024-06-14 11:18:59,954 INFO L125 PetriNetUnfolderBase]: For 13181/13181 co-relation queries the response was YES. [2024-06-14 11:18:59,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8307 conditions, 1954 events. 1186/1954 cut-off events. For 13181/13181 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10245 event pairs, 343 based on Foata normal form. 4/1953 useless extension candidates. Maximal degree in co-relation 8273. Up to 1665 conditions per place. [2024-06-14 11:18:59,968 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 31 changer transitions 0/104 dead transitions. [2024-06-14 11:18:59,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 104 transitions, 883 flow [2024-06-14 11:18:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:18:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:18:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:18:59,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:18:59,970 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 619 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:18:59,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 104 transitions, 883 flow [2024-06-14 11:18:59,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 837 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-14 11:18:59,991 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 654 flow [2024-06-14 11:18:59,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=654, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-14 11:18:59,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-14 11:18:59,992 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 654 flow [2024-06-14 11:18:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:18:59,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:18:59,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:18:59,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:18:59,993 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:18:59,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:18:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -847834086, now seen corresponding path program 1 times [2024-06-14 11:18:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:18:59,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857819003] [2024-06-14 11:18:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:18:59,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:00,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:00,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857819003] [2024-06-14 11:19:00,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857819003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:00,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:00,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504063712] [2024-06-14 11:19:00,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:00,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:00,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 654 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:00,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:00,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:00,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:00,343 INFO L124 PetriNetUnfolderBase]: 1191/1970 cut-off events. [2024-06-14 11:19:00,344 INFO L125 PetriNetUnfolderBase]: For 14397/14397 co-relation queries the response was YES. [2024-06-14 11:19:00,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8598 conditions, 1970 events. 1191/1970 cut-off events. For 14397/14397 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10404 event pairs, 319 based on Foata normal form. 1/1970 useless extension candidates. Maximal degree in co-relation 8562. Up to 1813 conditions per place. [2024-06-14 11:19:00,357 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 85 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-14 11:19:00,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 106 transitions, 980 flow [2024-06-14 11:19:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 11:19:00,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 11:19:00,358 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 654 flow. Second operand 5 states and 118 transitions. [2024-06-14 11:19:00,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 106 transitions, 980 flow [2024-06-14 11:19:00,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 907 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:00,377 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 693 flow [2024-06-14 11:19:00,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=693, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-14 11:19:00,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 11:19:00,378 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 693 flow [2024-06-14 11:19:00,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:00,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:00,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:19:00,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:00,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2110953095, now seen corresponding path program 1 times [2024-06-14 11:19:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467212273] [2024-06-14 11:19:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:00,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:00,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:00,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467212273] [2024-06-14 11:19:00,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467212273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:00,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:00,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:00,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969347064] [2024-06-14 11:19:00,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:00,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:00,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:00,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 693 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:00,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:00,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:00,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:00,709 INFO L124 PetriNetUnfolderBase]: 1183/1943 cut-off events. [2024-06-14 11:19:00,710 INFO L125 PetriNetUnfolderBase]: For 16328/16334 co-relation queries the response was YES. [2024-06-14 11:19:00,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8656 conditions, 1943 events. 1183/1943 cut-off events. For 16328/16334 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10168 event pairs, 337 based on Foata normal form. 6/1944 useless extension candidates. Maximal degree in co-relation 8618. Up to 1660 conditions per place. [2024-06-14 11:19:00,723 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 75 selfloop transitions, 31 changer transitions 0/112 dead transitions. [2024-06-14 11:19:00,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 979 flow [2024-06-14 11:19:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:00,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:19:00,725 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 693 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:00,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 979 flow [2024-06-14 11:19:00,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 959 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:00,746 INFO L231 Difference]: Finished difference. Result has 87 places, 92 transitions, 770 flow [2024-06-14 11:19:00,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=770, PETRI_PLACES=87, PETRI_TRANSITIONS=92} [2024-06-14 11:19:00,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-14 11:19:00,747 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 92 transitions, 770 flow [2024-06-14 11:19:00,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:00,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:00,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:00,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:19:00,748 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:00,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2119523975, now seen corresponding path program 2 times [2024-06-14 11:19:00,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:00,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697396184] [2024-06-14 11:19:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:00,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:00,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:00,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697396184] [2024-06-14 11:19:00,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697396184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:00,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:00,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:00,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420823160] [2024-06-14 11:19:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:00,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:00,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:00,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:00,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:00,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 92 transitions, 770 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:00,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:00,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:00,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:01,101 INFO L124 PetriNetUnfolderBase]: 1236/2049 cut-off events. [2024-06-14 11:19:01,102 INFO L125 PetriNetUnfolderBase]: For 19736/19742 co-relation queries the response was YES. [2024-06-14 11:19:01,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9416 conditions, 2049 events. 1236/2049 cut-off events. For 19736/19742 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10944 event pairs, 307 based on Foata normal form. 6/2050 useless extension candidates. Maximal degree in co-relation 9375. Up to 1487 conditions per place. [2024-06-14 11:19:01,117 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2024-06-14 11:19:01,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1158 flow [2024-06-14 11:19:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:19:01,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:19:01,119 INFO L175 Difference]: Start difference. First operand has 87 places, 92 transitions, 770 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:19:01,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1158 flow [2024-06-14 11:19:01,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 121 transitions, 1081 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:01,142 INFO L231 Difference]: Finished difference. Result has 89 places, 95 transitions, 808 flow [2024-06-14 11:19:01,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=808, PETRI_PLACES=89, PETRI_TRANSITIONS=95} [2024-06-14 11:19:01,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 11:19:01,143 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 95 transitions, 808 flow [2024-06-14 11:19:01,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:01,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:01,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:19:01,143 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:01,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1912117452, now seen corresponding path program 2 times [2024-06-14 11:19:01,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:01,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679209510] [2024-06-14 11:19:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:01,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679209510] [2024-06-14 11:19:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679209510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:01,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:01,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507247356] [2024-06-14 11:19:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:01,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:01,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 95 transitions, 808 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:01,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:01,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:01,476 INFO L124 PetriNetUnfolderBase]: 1238/2072 cut-off events. [2024-06-14 11:19:01,476 INFO L125 PetriNetUnfolderBase]: For 21541/21541 co-relation queries the response was YES. [2024-06-14 11:19:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9679 conditions, 2072 events. 1238/2072 cut-off events. For 21541/21541 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11179 event pairs, 346 based on Foata normal form. 2/2073 useless extension candidates. Maximal degree in co-relation 9637. Up to 1893 conditions per place. [2024-06-14 11:19:01,511 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-14 11:19:01,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1090 flow [2024-06-14 11:19:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 11:19:01,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 11:19:01,512 INFO L175 Difference]: Start difference. First operand has 89 places, 95 transitions, 808 flow. Second operand 4 states and 102 transitions. [2024-06-14 11:19:01,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1090 flow [2024-06-14 11:19:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 1028 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:01,536 INFO L231 Difference]: Finished difference. Result has 91 places, 98 transitions, 834 flow [2024-06-14 11:19:01,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=834, PETRI_PLACES=91, PETRI_TRANSITIONS=98} [2024-06-14 11:19:01,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 11:19:01,537 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 98 transitions, 834 flow [2024-06-14 11:19:01,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:01,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:01,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:01,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:19:01,538 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:01,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1509716165, now seen corresponding path program 1 times [2024-06-14 11:19:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932120672] [2024-06-14 11:19:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:01,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:01,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932120672] [2024-06-14 11:19:01,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932120672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:01,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:01,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:01,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186795210] [2024-06-14 11:19:01,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:01,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:01,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:01,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:01,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 98 transitions, 834 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:01,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:01,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:01,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:01,928 INFO L124 PetriNetUnfolderBase]: 1279/2130 cut-off events. [2024-06-14 11:19:01,929 INFO L125 PetriNetUnfolderBase]: For 25565/25573 co-relation queries the response was YES. [2024-06-14 11:19:01,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10140 conditions, 2130 events. 1279/2130 cut-off events. For 25565/25573 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11640 event pairs, 286 based on Foata normal form. 15/2142 useless extension candidates. Maximal degree in co-relation 10096. Up to 1066 conditions per place. [2024-06-14 11:19:01,945 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 86 selfloop transitions, 32 changer transitions 0/124 dead transitions. [2024-06-14 11:19:01,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1180 flow [2024-06-14 11:19:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:01,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:19:01,947 INFO L175 Difference]: Start difference. First operand has 91 places, 98 transitions, 834 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:01,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1180 flow [2024-06-14 11:19:01,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 124 transitions, 1140 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:01,977 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 876 flow [2024-06-14 11:19:01,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=876, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-06-14 11:19:01,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 11:19:01,978 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 876 flow [2024-06-14 11:19:01,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:01,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:01,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:01,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:19:01,979 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash 905879701, now seen corresponding path program 2 times [2024-06-14 11:19:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771541629] [2024-06-14 11:19:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:02,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771541629] [2024-06-14 11:19:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771541629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:02,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:02,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741103014] [2024-06-14 11:19:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:02,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:02,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:02,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 876 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:02,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:02,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:02,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:02,363 INFO L124 PetriNetUnfolderBase]: 1259/2095 cut-off events. [2024-06-14 11:19:02,363 INFO L125 PetriNetUnfolderBase]: For 26149/26157 co-relation queries the response was YES. [2024-06-14 11:19:02,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10180 conditions, 2095 events. 1259/2095 cut-off events. For 26149/26157 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11340 event pairs, 292 based on Foata normal form. 15/2105 useless extension candidates. Maximal degree in co-relation 10135. Up to 1555 conditions per place. [2024-06-14 11:19:02,377 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 35 changer transitions 0/125 dead transitions. [2024-06-14 11:19:02,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 125 transitions, 1182 flow [2024-06-14 11:19:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:19:02,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 11:19:02,379 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 876 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:19:02,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 125 transitions, 1182 flow [2024-06-14 11:19:02,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 1129 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:02,409 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 899 flow [2024-06-14 11:19:02,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=899, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-06-14 11:19:02,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-14 11:19:02,410 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 899 flow [2024-06-14 11:19:02,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:02,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:02,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:02,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:19:02,413 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:02,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:02,413 INFO L85 PathProgramCache]: Analyzing trace with hash 662167364, now seen corresponding path program 1 times [2024-06-14 11:19:02,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:02,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542146455] [2024-06-14 11:19:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:02,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:02,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:02,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542146455] [2024-06-14 11:19:02,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542146455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:02,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:02,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:02,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789547353] [2024-06-14 11:19:02,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:02,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:02,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:02,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:02,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 899 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:02,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:02,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:02,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:02,784 INFO L124 PetriNetUnfolderBase]: 1298/2182 cut-off events. [2024-06-14 11:19:02,785 INFO L125 PetriNetUnfolderBase]: For 28227/28227 co-relation queries the response was YES. [2024-06-14 11:19:02,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10606 conditions, 2182 events. 1298/2182 cut-off events. For 28227/28227 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12023 event pairs, 362 based on Foata normal form. 3/2180 useless extension candidates. Maximal degree in co-relation 10560. Up to 1766 conditions per place. [2024-06-14 11:19:02,799 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 48 changer transitions 0/146 dead transitions. [2024-06-14 11:19:02,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 146 transitions, 1525 flow [2024-06-14 11:19:02,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:19:02,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-14 11:19:02,802 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 899 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:19:02,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 146 transitions, 1525 flow [2024-06-14 11:19:02,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 146 transitions, 1442 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:02,834 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 1130 flow [2024-06-14 11:19:02,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1130, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2024-06-14 11:19:02,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 11:19:02,835 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 1130 flow [2024-06-14 11:19:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:02,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:02,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:02,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:19:02,836 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)] === [2024-06-14 11:19:02,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1384017821, now seen corresponding path program 3 times [2024-06-14 11:19:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:02,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794786117] [2024-06-14 11:19:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:02,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794786117] [2024-06-14 11:19:02,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794786117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:02,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444708582] [2024-06-14 11:19:02,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:02,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:02,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 1130 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:02,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:02,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:03,230 INFO L124 PetriNetUnfolderBase]: 1400/2370 cut-off events. [2024-06-14 11:19:03,230 INFO L125 PetriNetUnfolderBase]: For 36302/36312 co-relation queries the response was YES. [2024-06-14 11:19:03,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12154 conditions, 2370 events. 1400/2370 cut-off events. For 36302/36312 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13445 event pairs, 318 based on Foata normal form. 22/2390 useless extension candidates. Maximal degree in co-relation 12105. Up to 1692 conditions per place. [2024-06-14 11:19:03,248 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-14 11:19:03,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 152 transitions, 1608 flow [2024-06-14 11:19:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:19:03,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 11:19:03,250 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 1130 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:19:03,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 152 transitions, 1608 flow [2024-06-14 11:19:03,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 1570 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:03,291 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1186 flow [2024-06-14 11:19:03,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1186, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-14 11:19:03,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 11:19:03,292 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1186 flow [2024-06-14 11:19:03,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:03,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:03,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:03,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:19:03,293 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:03,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:03,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1546328807, now seen corresponding path program 4 times [2024-06-14 11:19:03,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:03,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799666984] [2024-06-14 11:19:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:03,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:03,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:03,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799666984] [2024-06-14 11:19:03,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799666984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:03,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:03,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:03,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778798090] [2024-06-14 11:19:03,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:03,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:03,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:03,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:03,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:03,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:03,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1186 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:03,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:03,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:03,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:03,709 INFO L124 PetriNetUnfolderBase]: 1458/2466 cut-off events. [2024-06-14 11:19:03,710 INFO L125 PetriNetUnfolderBase]: For 41016/41026 co-relation queries the response was YES. [2024-06-14 11:19:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12789 conditions, 2466 events. 1458/2466 cut-off events. For 41016/41026 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14146 event pairs, 426 based on Foata normal form. 21/2485 useless extension candidates. Maximal degree in co-relation 12737. Up to 2045 conditions per place. [2024-06-14 11:19:03,732 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 27 changer transitions 0/145 dead transitions. [2024-06-14 11:19:03,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 145 transitions, 1543 flow [2024-06-14 11:19:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:03,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:19:03,734 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1186 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:03,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 145 transitions, 1543 flow [2024-06-14 11:19:03,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 145 transitions, 1501 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:03,788 INFO L231 Difference]: Finished difference. Result has 111 places, 122 transitions, 1222 flow [2024-06-14 11:19:03,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1222, PETRI_PLACES=111, PETRI_TRANSITIONS=122} [2024-06-14 11:19:03,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 11:19:03,789 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 122 transitions, 1222 flow [2024-06-14 11:19:03,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:03,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:03,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:03,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:19:03,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:03,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1551691187, now seen corresponding path program 5 times [2024-06-14 11:19:03,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:03,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678210969] [2024-06-14 11:19:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:03,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:03,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:03,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678210969] [2024-06-14 11:19:03,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678210969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:03,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:03,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:03,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664596782] [2024-06-14 11:19:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:03,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:03,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:03,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 1222 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:03,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:03,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:03,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:04,204 INFO L124 PetriNetUnfolderBase]: 1430/2424 cut-off events. [2024-06-14 11:19:04,204 INFO L125 PetriNetUnfolderBase]: For 40480/40490 co-relation queries the response was YES. [2024-06-14 11:19:04,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12524 conditions, 2424 events. 1430/2424 cut-off events. For 40480/40490 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13868 event pairs, 407 based on Foata normal form. 26/2448 useless extension candidates. Maximal degree in co-relation 12470. Up to 2001 conditions per place. [2024-06-14 11:19:04,233 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-14 11:19:04,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 148 transitions, 1578 flow [2024-06-14 11:19:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:19:04,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:19:04,235 INFO L175 Difference]: Start difference. First operand has 111 places, 122 transitions, 1222 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:19:04,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 148 transitions, 1578 flow [2024-06-14 11:19:04,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 148 transitions, 1519 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:04,285 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1224 flow [2024-06-14 11:19:04,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1224, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-14 11:19:04,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 11:19:04,286 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1224 flow [2024-06-14 11:19:04,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:04,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:04,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:04,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:19:04,286 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:04,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1546113605, now seen corresponding path program 1 times [2024-06-14 11:19:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:04,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746543145] [2024-06-14 11:19:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:04,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:04,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746543145] [2024-06-14 11:19:04,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746543145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:04,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:04,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356683473] [2024-06-14 11:19:04,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:04,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:04,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:04,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:04,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1224 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:04,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:04,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:04,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:04,683 INFO L124 PetriNetUnfolderBase]: 1471/2503 cut-off events. [2024-06-14 11:19:04,684 INFO L125 PetriNetUnfolderBase]: For 42585/42595 co-relation queries the response was YES. [2024-06-14 11:19:04,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12866 conditions, 2503 events. 1471/2503 cut-off events. For 42585/42595 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14505 event pairs, 348 based on Foata normal form. 17/2518 useless extension candidates. Maximal degree in co-relation 12811. Up to 1783 conditions per place. [2024-06-14 11:19:04,705 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-14 11:19:04,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 149 transitions, 1599 flow [2024-06-14 11:19:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:19:04,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:19:04,707 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1224 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:19:04,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 149 transitions, 1599 flow [2024-06-14 11:19:04,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1531 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:04,756 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 1241 flow [2024-06-14 11:19:04,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1241, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-14 11:19:04,757 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 11:19:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 1241 flow [2024-06-14 11:19:04,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:04,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:04,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:04,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:19:04,758 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:04,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:04,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2108308426, now seen corresponding path program 2 times [2024-06-14 11:19:04,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:04,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688622847] [2024-06-14 11:19:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:04,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688622847] [2024-06-14 11:19:04,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688622847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:04,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:04,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087305347] [2024-06-14 11:19:04,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:04,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:04,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:04,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:04,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:04,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 1241 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:04,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:04,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:04,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:05,134 INFO L124 PetriNetUnfolderBase]: 1514/2559 cut-off events. [2024-06-14 11:19:05,134 INFO L125 PetriNetUnfolderBase]: For 43664/43664 co-relation queries the response was YES. [2024-06-14 11:19:05,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13394 conditions, 2559 events. 1514/2559 cut-off events. For 43664/43664 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14821 event pairs, 408 based on Foata normal form. 3/2557 useless extension candidates. Maximal degree in co-relation 13338. Up to 2099 conditions per place. [2024-06-14 11:19:05,152 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 53 changer transitions 0/154 dead transitions. [2024-06-14 11:19:05,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 154 transitions, 1855 flow [2024-06-14 11:19:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:19:05,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 11:19:05,153 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 1241 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:19:05,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 154 transitions, 1855 flow [2024-06-14 11:19:05,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 154 transitions, 1785 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:05,208 INFO L231 Difference]: Finished difference. Result has 117 places, 133 transitions, 1408 flow [2024-06-14 11:19:05,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1408, PETRI_PLACES=117, PETRI_TRANSITIONS=133} [2024-06-14 11:19:05,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-14 11:19:05,209 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 133 transitions, 1408 flow [2024-06-14 11:19:05,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:05,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:05,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:05,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:19:05,209 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:05,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:05,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1373217612, now seen corresponding path program 1 times [2024-06-14 11:19:05,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:05,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096143174] [2024-06-14 11:19:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:05,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:05,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:05,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096143174] [2024-06-14 11:19:05,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096143174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:05,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:05,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:05,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431482823] [2024-06-14 11:19:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:05,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:05,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:05,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:05,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 133 transitions, 1408 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:05,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:05,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:05,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:05,582 INFO L124 PetriNetUnfolderBase]: 1519/2577 cut-off events. [2024-06-14 11:19:05,582 INFO L125 PetriNetUnfolderBase]: For 45739/45739 co-relation queries the response was YES. [2024-06-14 11:19:05,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13658 conditions, 2577 events. 1519/2577 cut-off events. For 45739/45739 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14962 event pairs, 386 based on Foata normal form. 1/2577 useless extension candidates. Maximal degree in co-relation 13600. Up to 2342 conditions per place. [2024-06-14 11:19:05,602 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 125 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-14 11:19:05,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 156 transitions, 1888 flow [2024-06-14 11:19:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:19:05,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:19:05,604 INFO L175 Difference]: Start difference. First operand has 117 places, 133 transitions, 1408 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:19:05,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 156 transitions, 1888 flow [2024-06-14 11:19:05,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 156 transitions, 1799 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:05,656 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1469 flow [2024-06-14 11:19:05,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-14 11:19:05,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-14 11:19:05,657 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1469 flow [2024-06-14 11:19:05,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:05,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:05,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:05,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:19:05,657 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)] === [2024-06-14 11:19:05,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:05,658 INFO L85 PathProgramCache]: Analyzing trace with hash -606407173, now seen corresponding path program 2 times [2024-06-14 11:19:05,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:05,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457742063] [2024-06-14 11:19:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:05,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:05,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:05,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457742063] [2024-06-14 11:19:05,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457742063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:05,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:05,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:05,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184437009] [2024-06-14 11:19:05,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:05,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:05,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:05,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:05,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1469 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:05,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:05,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:05,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:06,045 INFO L124 PetriNetUnfolderBase]: 1499/2536 cut-off events. [2024-06-14 11:19:06,045 INFO L125 PetriNetUnfolderBase]: For 48833/48833 co-relation queries the response was YES. [2024-06-14 11:19:06,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13327 conditions, 2536 events. 1499/2536 cut-off events. For 48833/48833 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14605 event pairs, 274 based on Foata normal form. 12/2543 useless extension candidates. Maximal degree in co-relation 13268. Up to 1931 conditions per place. [2024-06-14 11:19:06,064 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-14 11:19:06,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 168 transitions, 1875 flow [2024-06-14 11:19:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:06,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:19:06,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 11:19:06,066 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1469 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:19:06,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 168 transitions, 1875 flow [2024-06-14 11:19:06,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 168 transitions, 1823 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:06,136 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1493 flow [2024-06-14 11:19:06,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1493, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-14 11:19:06,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 11:19:06,137 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1493 flow [2024-06-14 11:19:06,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:06,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:06,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:06,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:19:06,138 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:06,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash 830815325, now seen corresponding path program 3 times [2024-06-14 11:19:06,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:06,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089362150] [2024-06-14 11:19:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:06,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:06,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:06,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089362150] [2024-06-14 11:19:06,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089362150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:06,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:06,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:06,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908748108] [2024-06-14 11:19:06,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:06,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:06,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:06,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:06,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:06,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1493 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:06,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:06,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:06,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:06,564 INFO L124 PetriNetUnfolderBase]: 1479/2514 cut-off events. [2024-06-14 11:19:06,564 INFO L125 PetriNetUnfolderBase]: For 49509/49517 co-relation queries the response was YES. [2024-06-14 11:19:06,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13233 conditions, 2514 events. 1479/2514 cut-off events. For 49509/49517 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14552 event pairs, 254 based on Foata normal form. 15/2526 useless extension candidates. Maximal degree in co-relation 13172. Up to 1219 conditions per place. [2024-06-14 11:19:06,580 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 120 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-14 11:19:06,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 162 transitions, 1827 flow [2024-06-14 11:19:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:19:06,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 11:19:06,581 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1493 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:19:06,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 162 transitions, 1827 flow [2024-06-14 11:19:06,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 162 transitions, 1726 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:06,662 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1422 flow [2024-06-14 11:19:06,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1422, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-14 11:19:06,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 11:19:06,663 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1422 flow [2024-06-14 11:19:06,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:06,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:06,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:06,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:19:06,663 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:06,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:06,664 INFO L85 PathProgramCache]: Analyzing trace with hash -853900106, now seen corresponding path program 2 times [2024-06-14 11:19:06,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137468881] [2024-06-14 11:19:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:06,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:06,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137468881] [2024-06-14 11:19:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137468881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:06,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:06,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:06,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482651902] [2024-06-14 11:19:06,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:06,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:06,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:06,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:06,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1422 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:06,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:06,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:06,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:07,064 INFO L124 PetriNetUnfolderBase]: 1476/2509 cut-off events. [2024-06-14 11:19:07,065 INFO L125 PetriNetUnfolderBase]: For 44117/44117 co-relation queries the response was YES. [2024-06-14 11:19:07,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13076 conditions, 2509 events. 1476/2509 cut-off events. For 44117/44117 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14520 event pairs, 358 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 13014. Up to 2281 conditions per place. [2024-06-14 11:19:07,084 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 127 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2024-06-14 11:19:07,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1754 flow [2024-06-14 11:19:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 11:19:07,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 11:19:07,086 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1422 flow. Second operand 5 states and 118 transitions. [2024-06-14 11:19:07,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1754 flow [2024-06-14 11:19:07,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 153 transitions, 1584 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:07,149 INFO L231 Difference]: Finished difference. Result has 123 places, 138 transitions, 1298 flow [2024-06-14 11:19:07,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=138} [2024-06-14 11:19:07,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 11:19:07,150 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 138 transitions, 1298 flow [2024-06-14 11:19:07,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:07,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:07,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:07,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:19:07,150 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:07,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash 556194804, now seen corresponding path program 3 times [2024-06-14 11:19:07,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:07,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930195435] [2024-06-14 11:19:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:07,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930195435] [2024-06-14 11:19:07,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930195435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:07,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:07,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:07,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004527849] [2024-06-14 11:19:07,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:07,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:07,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:07,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:07,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:07,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:07,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 138 transitions, 1298 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:07,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:07,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:07,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:07,592 INFO L124 PetriNetUnfolderBase]: 1578/2679 cut-off events. [2024-06-14 11:19:07,592 INFO L125 PetriNetUnfolderBase]: For 50382/50384 co-relation queries the response was YES. [2024-06-14 11:19:07,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13524 conditions, 2679 events. 1578/2679 cut-off events. For 50382/50384 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15708 event pairs, 364 based on Foata normal form. 8/2686 useless extension candidates. Maximal degree in co-relation 13463. Up to 2191 conditions per place. [2024-06-14 11:19:07,613 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 68 changer transitions 0/191 dead transitions. [2024-06-14 11:19:07,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 2107 flow [2024-06-14 11:19:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 11:19:07,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-14 11:19:07,614 INFO L175 Difference]: Start difference. First operand has 123 places, 138 transitions, 1298 flow. Second operand 6 states and 158 transitions. [2024-06-14 11:19:07,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 2107 flow [2024-06-14 11:19:07,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 2041 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:07,691 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1721 flow [2024-06-14 11:19:07,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1721, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-14 11:19:07,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-14 11:19:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1721 flow [2024-06-14 11:19:07,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:07,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:07,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:07,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:19:07,692 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:07,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 60126866, now seen corresponding path program 1 times [2024-06-14 11:19:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353664187] [2024-06-14 11:19:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:07,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:07,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353664187] [2024-06-14 11:19:07,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353664187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:07,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:07,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:07,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974702376] [2024-06-14 11:19:07,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:07,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:07,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:07,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:07,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:07,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:07,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1721 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:07,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:07,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:07,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:08,098 INFO L124 PetriNetUnfolderBase]: 1601/2702 cut-off events. [2024-06-14 11:19:08,098 INFO L125 PetriNetUnfolderBase]: For 56962/56970 co-relation queries the response was YES. [2024-06-14 11:19:08,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14963 conditions, 2702 events. 1601/2702 cut-off events. For 56962/56970 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15833 event pairs, 395 based on Foata normal form. 6/2703 useless extension candidates. Maximal degree in co-relation 14899. Up to 2191 conditions per place. [2024-06-14 11:19:08,117 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 77 changer transitions 0/194 dead transitions. [2024-06-14 11:19:08,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 194 transitions, 2463 flow [2024-06-14 11:19:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 11:19:08,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 11:19:08,119 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1721 flow. Second operand 6 states and 148 transitions. [2024-06-14 11:19:08,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 194 transitions, 2463 flow [2024-06-14 11:19:08,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 2413 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:08,197 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 2017 flow [2024-06-14 11:19:08,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2017, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-06-14 11:19:08,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 11:19:08,198 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 2017 flow [2024-06-14 11:19:08,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:08,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:08,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:19:08,199 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)] === [2024-06-14 11:19:08,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1550533458, now seen corresponding path program 2 times [2024-06-14 11:19:08,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460999331] [2024-06-14 11:19:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:08,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:08,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:08,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460999331] [2024-06-14 11:19:08,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460999331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:08,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:08,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255783093] [2024-06-14 11:19:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:08,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:08,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 2017 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:08,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:08,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:08,640 INFO L124 PetriNetUnfolderBase]: 1667/2819 cut-off events. [2024-06-14 11:19:08,640 INFO L125 PetriNetUnfolderBase]: For 63481/63481 co-relation queries the response was YES. [2024-06-14 11:19:08,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16454 conditions, 2819 events. 1667/2819 cut-off events. For 63481/63481 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16636 event pairs, 359 based on Foata normal form. 4/2822 useless extension candidates. Maximal degree in co-relation 16387. Up to 2518 conditions per place. [2024-06-14 11:19:08,663 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-14 11:19:08,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 212 transitions, 2856 flow [2024-06-14 11:19:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:19:08,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 11:19:08,665 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 2017 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:19:08,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 212 transitions, 2856 flow [2024-06-14 11:19:08,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 212 transitions, 2760 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:08,770 INFO L231 Difference]: Finished difference. Result has 141 places, 196 transitions, 2376 flow [2024-06-14 11:19:08,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2376, PETRI_PLACES=141, PETRI_TRANSITIONS=196} [2024-06-14 11:19:08,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-14 11:19:08,771 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 196 transitions, 2376 flow [2024-06-14 11:19:08,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:08,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:08,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:19:08,772 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)] === [2024-06-14 11:19:08,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash 199098160, now seen corresponding path program 3 times [2024-06-14 11:19:08,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:08,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183044280] [2024-06-14 11:19:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:08,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183044280] [2024-06-14 11:19:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183044280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:08,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:08,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438058183] [2024-06-14 11:19:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:08,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:08,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:08,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:08,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 196 transitions, 2376 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:08,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:08,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:09,304 INFO L124 PetriNetUnfolderBase]: 1665/2825 cut-off events. [2024-06-14 11:19:09,304 INFO L125 PetriNetUnfolderBase]: For 66407/66407 co-relation queries the response was YES. [2024-06-14 11:19:09,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16577 conditions, 2825 events. 1665/2825 cut-off events. For 66407/66407 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16732 event pairs, 354 based on Foata normal form. 6/2830 useless extension candidates. Maximal degree in co-relation 16506. Up to 2266 conditions per place. [2024-06-14 11:19:09,330 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 99 changer transitions 0/229 dead transitions. [2024-06-14 11:19:09,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 3093 flow [2024-06-14 11:19:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:19:09,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 11:19:09,331 INFO L175 Difference]: Start difference. First operand has 141 places, 196 transitions, 2376 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:19:09,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 3093 flow [2024-06-14 11:19:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 229 transitions, 2963 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:09,430 INFO L231 Difference]: Finished difference. Result has 145 places, 201 transitions, 2561 flow [2024-06-14 11:19:09,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2561, PETRI_PLACES=145, PETRI_TRANSITIONS=201} [2024-06-14 11:19:09,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 11:19:09,431 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 201 transitions, 2561 flow [2024-06-14 11:19:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:09,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:09,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:19:09,432 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)] === [2024-06-14 11:19:09,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 199344424, now seen corresponding path program 1 times [2024-06-14 11:19:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:09,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811226746] [2024-06-14 11:19:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:09,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:09,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811226746] [2024-06-14 11:19:09,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811226746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:09,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:09,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:09,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960960594] [2024-06-14 11:19:09,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:09,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:09,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:09,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:09,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:09,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:09,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 201 transitions, 2561 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:09,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:09,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:09,835 INFO L124 PetriNetUnfolderBase]: 1660/2801 cut-off events. [2024-06-14 11:19:09,836 INFO L125 PetriNetUnfolderBase]: For 68181/68181 co-relation queries the response was YES. [2024-06-14 11:19:09,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16926 conditions, 2801 events. 1660/2801 cut-off events. For 68181/68181 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 16493 event pairs, 355 based on Foata normal form. 2/2802 useless extension candidates. Maximal degree in co-relation 16854. Up to 2557 conditions per place. [2024-06-14 11:19:09,858 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 196 selfloop transitions, 10 changer transitions 0/212 dead transitions. [2024-06-14 11:19:09,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 212 transitions, 3025 flow [2024-06-14 11:19:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-14 11:19:09,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 11:19:09,859 INFO L175 Difference]: Start difference. First operand has 145 places, 201 transitions, 2561 flow. Second operand 4 states and 93 transitions. [2024-06-14 11:19:09,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 212 transitions, 3025 flow [2024-06-14 11:19:09,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 212 transitions, 2847 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:10,022 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2442 flow [2024-06-14 11:19:10,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2442, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-14 11:19:10,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 11:19:10,022 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2442 flow [2024-06-14 11:19:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:10,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:10,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:10,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:19:10,023 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:10,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1265996464, now seen corresponding path program 1 times [2024-06-14 11:19:10,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:10,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476733384] [2024-06-14 11:19:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:10,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:10,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:10,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476733384] [2024-06-14 11:19:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476733384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:10,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:10,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:10,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608115589] [2024-06-14 11:19:10,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:10,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:10,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:10,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2442 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:10,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:10,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:10,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:10,494 INFO L124 PetriNetUnfolderBase]: 1699/2859 cut-off events. [2024-06-14 11:19:10,494 INFO L125 PetriNetUnfolderBase]: For 74693/74693 co-relation queries the response was YES. [2024-06-14 11:19:10,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 2859 events. 1699/2859 cut-off events. For 74693/74693 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16891 event pairs, 389 based on Foata normal form. 3/2857 useless extension candidates. Maximal degree in co-relation 17084. Up to 2080 conditions per place. [2024-06-14 11:19:10,518 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 124 changer transitions 0/249 dead transitions. [2024-06-14 11:19:10,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 249 transitions, 3460 flow [2024-06-14 11:19:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:19:10,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 11:19:10,520 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2442 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:19:10,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 249 transitions, 3460 flow [2024-06-14 11:19:10,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 249 transitions, 3413 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:10,648 INFO L231 Difference]: Finished difference. Result has 152 places, 222 transitions, 3033 flow [2024-06-14 11:19:10,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=152, PETRI_TRANSITIONS=222} [2024-06-14 11:19:10,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 11:19:10,649 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 222 transitions, 3033 flow [2024-06-14 11:19:10,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:10,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:10,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:10,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:19:10,649 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)] === [2024-06-14 11:19:10,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1072211729, now seen corresponding path program 1 times [2024-06-14 11:19:10,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:10,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774126527] [2024-06-14 11:19:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:10,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774126527] [2024-06-14 11:19:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774126527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:10,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:10,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:10,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531758279] [2024-06-14 11:19:10,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:10,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:10,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:10,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 222 transitions, 3033 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:10,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:10,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:10,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:11,156 INFO L124 PetriNetUnfolderBase]: 1725/2892 cut-off events. [2024-06-14 11:19:11,157 INFO L125 PetriNetUnfolderBase]: For 83467/83467 co-relation queries the response was YES. [2024-06-14 11:19:11,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18996 conditions, 2892 events. 1725/2892 cut-off events. For 83467/83467 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17049 event pairs, 386 based on Foata normal form. 2/2889 useless extension candidates. Maximal degree in co-relation 18920. Up to 2320 conditions per place. [2024-06-14 11:19:11,178 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 157 selfloop transitions, 91 changer transitions 0/254 dead transitions. [2024-06-14 11:19:11,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 254 transitions, 3988 flow [2024-06-14 11:19:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:19:11,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 11:19:11,179 INFO L175 Difference]: Start difference. First operand has 152 places, 222 transitions, 3033 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:19:11,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 254 transitions, 3988 flow [2024-06-14 11:19:11,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 3904 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:11,330 INFO L231 Difference]: Finished difference. Result has 158 places, 232 transitions, 3362 flow [2024-06-14 11:19:11,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3362, PETRI_PLACES=158, PETRI_TRANSITIONS=232} [2024-06-14 11:19:11,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 11:19:11,330 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 232 transitions, 3362 flow [2024-06-14 11:19:11,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:11,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:11,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:11,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:19:11,331 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)] === [2024-06-14 11:19:11,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash -379933867, now seen corresponding path program 2 times [2024-06-14 11:19:11,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:11,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907847660] [2024-06-14 11:19:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:11,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907847660] [2024-06-14 11:19:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907847660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:11,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:11,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10787158] [2024-06-14 11:19:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:11,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:11,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:11,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 232 transitions, 3362 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:11,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:11,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:11,811 INFO L124 PetriNetUnfolderBase]: 1719/2884 cut-off events. [2024-06-14 11:19:11,812 INFO L125 PetriNetUnfolderBase]: For 85214/85214 co-relation queries the response was YES. [2024-06-14 11:19:11,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18858 conditions, 2884 events. 1719/2884 cut-off events. For 85214/85214 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17039 event pairs, 386 based on Foata normal form. 2/2881 useless extension candidates. Maximal degree in co-relation 18778. Up to 2317 conditions per place. [2024-06-14 11:19:11,839 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 87 changer transitions 0/251 dead transitions. [2024-06-14 11:19:11,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 251 transitions, 4108 flow [2024-06-14 11:19:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:19:11,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:19:11,840 INFO L175 Difference]: Start difference. First operand has 158 places, 232 transitions, 3362 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:19:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 251 transitions, 4108 flow [2024-06-14 11:19:12,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 251 transitions, 3981 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:12,030 INFO L231 Difference]: Finished difference. Result has 162 places, 232 transitions, 3418 flow [2024-06-14 11:19:12,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3418, PETRI_PLACES=162, PETRI_TRANSITIONS=232} [2024-06-14 11:19:12,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-14 11:19:12,030 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 232 transitions, 3418 flow [2024-06-14 11:19:12,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:12,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:12,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:19:12,031 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)] === [2024-06-14 11:19:12,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1275262054, now seen corresponding path program 2 times [2024-06-14 11:19:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554788463] [2024-06-14 11:19:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:12,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:12,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:12,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554788463] [2024-06-14 11:19:12,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554788463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:12,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:12,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:12,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143050789] [2024-06-14 11:19:12,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:12,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:12,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:12,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:12,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 232 transitions, 3418 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:12,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:12,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:12,560 INFO L124 PetriNetUnfolderBase]: 1786/2996 cut-off events. [2024-06-14 11:19:12,560 INFO L125 PetriNetUnfolderBase]: For 94871/94871 co-relation queries the response was YES. [2024-06-14 11:19:12,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19914 conditions, 2996 events. 1786/2996 cut-off events. For 94871/94871 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 17836 event pairs, 392 based on Foata normal form. 3/2994 useless extension candidates. Maximal degree in co-relation 19833. Up to 2136 conditions per place. [2024-06-14 11:19:12,588 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 134 selfloop transitions, 129 changer transitions 0/269 dead transitions. [2024-06-14 11:19:12,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 269 transitions, 4532 flow [2024-06-14 11:19:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:19:12,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:19:12,590 INFO L175 Difference]: Start difference. First operand has 162 places, 232 transitions, 3418 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:19:12,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 269 transitions, 4532 flow [2024-06-14 11:19:12,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 269 transitions, 4372 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:12,791 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3756 flow [2024-06-14 11:19:12,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3258, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3756, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-14 11:19:12,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-14 11:19:12,791 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3756 flow [2024-06-14 11:19:12,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:12,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:12,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:19:12,792 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:12,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:12,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1275250894, now seen corresponding path program 3 times [2024-06-14 11:19:12,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:12,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317290040] [2024-06-14 11:19:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:12,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:12,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:12,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317290040] [2024-06-14 11:19:12,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317290040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:12,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:12,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:12,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747472225] [2024-06-14 11:19:12,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:12,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:12,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:12,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:12,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:12,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3756 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:12,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:12,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:13,300 INFO L124 PetriNetUnfolderBase]: 1781/2990 cut-off events. [2024-06-14 11:19:13,300 INFO L125 PetriNetUnfolderBase]: For 98343/98343 co-relation queries the response was YES. [2024-06-14 11:19:13,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20193 conditions, 2990 events. 1781/2990 cut-off events. For 98343/98343 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17797 event pairs, 392 based on Foata normal form. 3/2988 useless extension candidates. Maximal degree in co-relation 20110. Up to 2134 conditions per place. [2024-06-14 11:19:13,328 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 130 changer transitions 0/268 dead transitions. [2024-06-14 11:19:13,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 4597 flow [2024-06-14 11:19:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:19:13,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:19:13,329 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3756 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:19:13,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 4597 flow [2024-06-14 11:19:13,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 268 transitions, 4341 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:13,533 INFO L231 Difference]: Finished difference. Result has 171 places, 247 transitions, 3791 flow [2024-06-14 11:19:13,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3791, PETRI_PLACES=171, PETRI_TRANSITIONS=247} [2024-06-14 11:19:13,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 11:19:13,533 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 247 transitions, 3791 flow [2024-06-14 11:19:13,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:13,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:13,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:13,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:19:13,534 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:13,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash 827533781, now seen corresponding path program 3 times [2024-06-14 11:19:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:13,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222807870] [2024-06-14 11:19:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:13,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:13,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:13,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222807870] [2024-06-14 11:19:13,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222807870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:13,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:13,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:13,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273917989] [2024-06-14 11:19:13,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:13,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:13,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:13,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:13,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 247 transitions, 3791 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:13,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:13,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:13,989 INFO L124 PetriNetUnfolderBase]: 1767/2963 cut-off events. [2024-06-14 11:19:13,989 INFO L125 PetriNetUnfolderBase]: For 101935/101943 co-relation queries the response was YES. [2024-06-14 11:19:14,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19958 conditions, 2963 events. 1767/2963 cut-off events. For 101935/101943 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17583 event pairs, 394 based on Foata normal form. 5/2963 useless extension candidates. Maximal degree in co-relation 19874. Up to 2390 conditions per place. [2024-06-14 11:19:14,018 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 93 changer transitions 0/266 dead transitions. [2024-06-14 11:19:14,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 266 transitions, 4585 flow [2024-06-14 11:19:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:19:14,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 11:19:14,021 INFO L175 Difference]: Start difference. First operand has 171 places, 247 transitions, 3791 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:19:14,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 266 transitions, 4585 flow [2024-06-14 11:19:14,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4312 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:14,283 INFO L231 Difference]: Finished difference. Result has 173 places, 247 transitions, 3711 flow [2024-06-14 11:19:14,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3711, PETRI_PLACES=173, PETRI_TRANSITIONS=247} [2024-06-14 11:19:14,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 11:19:14,283 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 247 transitions, 3711 flow [2024-06-14 11:19:14,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:14,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:14,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:14,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:19:14,284 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:14,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash 347586797, now seen corresponding path program 4 times [2024-06-14 11:19:14,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:14,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799520045] [2024-06-14 11:19:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:14,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799520045] [2024-06-14 11:19:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799520045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:14,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:14,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539670327] [2024-06-14 11:19:14,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:14,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:14,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:14,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:14,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 247 transitions, 3711 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:14,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:14,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:14,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:14,873 INFO L124 PetriNetUnfolderBase]: 1751/2950 cut-off events. [2024-06-14 11:19:14,873 INFO L125 PetriNetUnfolderBase]: For 100608/100608 co-relation queries the response was YES. [2024-06-14 11:19:14,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19506 conditions, 2950 events. 1751/2950 cut-off events. For 100608/100608 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17526 event pairs, 351 based on Foata normal form. 4/2953 useless extension candidates. Maximal degree in co-relation 19421. Up to 2643 conditions per place. [2024-06-14 11:19:14,897 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 37 changer transitions 0/262 dead transitions. [2024-06-14 11:19:14,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 4267 flow [2024-06-14 11:19:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 11:19:14,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:19:14,898 INFO L175 Difference]: Start difference. First operand has 173 places, 247 transitions, 3711 flow. Second operand 7 states and 154 transitions. [2024-06-14 11:19:14,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 4267 flow [2024-06-14 11:19:15,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 262 transitions, 3915 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:15,138 INFO L231 Difference]: Finished difference. Result has 172 places, 247 transitions, 3448 flow [2024-06-14 11:19:15,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=172, PETRI_TRANSITIONS=247} [2024-06-14 11:19:15,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 11:19:15,139 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 247 transitions, 3448 flow [2024-06-14 11:19:15,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:15,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:15,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:15,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:19:15,139 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:15,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:15,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1876861209, now seen corresponding path program 5 times [2024-06-14 11:19:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:15,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273694696] [2024-06-14 11:19:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:15,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:15,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:15,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273694696] [2024-06-14 11:19:15,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273694696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:15,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:15,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:15,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372882460] [2024-06-14 11:19:15,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:15,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:15,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:15,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:15,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 247 transitions, 3448 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:15,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:15,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:15,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:15,609 INFO L124 PetriNetUnfolderBase]: 1743/2936 cut-off events. [2024-06-14 11:19:15,609 INFO L125 PetriNetUnfolderBase]: For 100749/100751 co-relation queries the response was YES. [2024-06-14 11:19:15,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18889 conditions, 2936 events. 1743/2936 cut-off events. For 100749/100751 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17388 event pairs, 359 based on Foata normal form. 6/2941 useless extension candidates. Maximal degree in co-relation 18805. Up to 2381 conditions per place. [2024-06-14 11:19:15,638 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 95 changer transitions 0/274 dead transitions. [2024-06-14 11:19:15,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 4274 flow [2024-06-14 11:19:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 11:19:15,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-14 11:19:15,639 INFO L175 Difference]: Start difference. First operand has 172 places, 247 transitions, 3448 flow. Second operand 6 states and 154 transitions. [2024-06-14 11:19:15,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 4274 flow [2024-06-14 11:19:15,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 274 transitions, 4195 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:15,882 INFO L231 Difference]: Finished difference. Result has 173 places, 250 transitions, 3651 flow [2024-06-14 11:19:15,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3651, PETRI_PLACES=173, PETRI_TRANSITIONS=250} [2024-06-14 11:19:15,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 11:19:15,882 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 250 transitions, 3651 flow [2024-06-14 11:19:15,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:15,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:15,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:15,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:19:15,885 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:15,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:15,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1877068599, now seen corresponding path program 6 times [2024-06-14 11:19:15,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:15,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037179057] [2024-06-14 11:19:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:15,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037179057] [2024-06-14 11:19:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037179057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:15,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:15,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560864871] [2024-06-14 11:19:15,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:16,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:16,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 250 transitions, 3651 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:16,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:16,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:16,456 INFO L124 PetriNetUnfolderBase]: 1719/2897 cut-off events. [2024-06-14 11:19:16,456 INFO L125 PetriNetUnfolderBase]: For 101937/101937 co-relation queries the response was YES. [2024-06-14 11:19:16,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18812 conditions, 2897 events. 1719/2897 cut-off events. For 101937/101937 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17192 event pairs, 351 based on Foata normal form. 4/2900 useless extension candidates. Maximal degree in co-relation 18727. Up to 2361 conditions per place. [2024-06-14 11:19:16,484 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 169 selfloop transitions, 102 changer transitions 0/277 dead transitions. [2024-06-14 11:19:16,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 277 transitions, 4343 flow [2024-06-14 11:19:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:19:16,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:19:16,485 INFO L175 Difference]: Start difference. First operand has 173 places, 250 transitions, 3651 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:19:16,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 277 transitions, 4343 flow [2024-06-14 11:19:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 277 transitions, 4147 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:16,710 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 3693 flow [2024-06-14 11:19:16,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3693, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-14 11:19:16,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-14 11:19:16,711 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 3693 flow [2024-06-14 11:19:16,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:16,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:16,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:16,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:19:16,712 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:16,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:16,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1871362212, now seen corresponding path program 4 times [2024-06-14 11:19:16,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9559540] [2024-06-14 11:19:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:16,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:16,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:16,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9559540] [2024-06-14 11:19:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9559540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:16,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020144249] [2024-06-14 11:19:16,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:16,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:16,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:16,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:16,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 3693 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:16,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:16,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,267 INFO L124 PetriNetUnfolderBase]: 1794/3025 cut-off events. [2024-06-14 11:19:17,267 INFO L125 PetriNetUnfolderBase]: For 107882/107884 co-relation queries the response was YES. [2024-06-14 11:19:17,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19914 conditions, 3025 events. 1794/3025 cut-off events. For 107882/107884 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18091 event pairs, 358 based on Foata normal form. 5/3029 useless extension candidates. Maximal degree in co-relation 19829. Up to 2370 conditions per place. [2024-06-14 11:19:17,298 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 181 selfloop transitions, 108 changer transitions 0/295 dead transitions. [2024-06-14 11:19:17,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 295 transitions, 4923 flow [2024-06-14 11:19:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:19:17,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:19:17,299 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 3693 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:19:17,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 295 transitions, 4923 flow [2024-06-14 11:19:17,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 295 transitions, 4613 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:19:17,462 INFO L231 Difference]: Finished difference. Result has 176 places, 270 transitions, 4000 flow [2024-06-14 11:19:17,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4000, PETRI_PLACES=176, PETRI_TRANSITIONS=270} [2024-06-14 11:19:17,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-14 11:19:17,463 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 270 transitions, 4000 flow [2024-06-14 11:19:17,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:17,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:17,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:19:17,464 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:17,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1730975494, now seen corresponding path program 5 times [2024-06-14 11:19:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:17,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172057892] [2024-06-14 11:19:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:17,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:17,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172057892] [2024-06-14 11:19:17,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172057892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:17,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:17,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:17,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019989876] [2024-06-14 11:19:17,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:17,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:17,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:17,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:17,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 270 transitions, 4000 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:17,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:17,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:17,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,965 INFO L124 PetriNetUnfolderBase]: 1785/3012 cut-off events. [2024-06-14 11:19:17,966 INFO L125 PetriNetUnfolderBase]: For 102410/102412 co-relation queries the response was YES. [2024-06-14 11:19:17,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19802 conditions, 3012 events. 1785/3012 cut-off events. For 102410/102412 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18018 event pairs, 358 based on Foata normal form. 5/3016 useless extension candidates. Maximal degree in co-relation 19716. Up to 2363 conditions per place. [2024-06-14 11:19:17,992 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 120 changer transitions 0/301 dead transitions. [2024-06-14 11:19:17,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 301 transitions, 4963 flow [2024-06-14 11:19:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:19:17,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-14 11:19:17,994 INFO L175 Difference]: Start difference. First operand has 176 places, 270 transitions, 4000 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:19:17,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 301 transitions, 4963 flow [2024-06-14 11:19:18,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 301 transitions, 4854 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:18,259 INFO L231 Difference]: Finished difference. Result has 183 places, 271 transitions, 4239 flow [2024-06-14 11:19:18,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4239, PETRI_PLACES=183, PETRI_TRANSITIONS=271} [2024-06-14 11:19:18,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 11:19:18,260 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 271 transitions, 4239 flow [2024-06-14 11:19:18,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:18,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:18,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:19:18,260 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:18,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash 838825562, now seen corresponding path program 1 times [2024-06-14 11:19:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:18,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601286343] [2024-06-14 11:19:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601286343] [2024-06-14 11:19:18,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601286343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:18,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:18,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:18,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487035682] [2024-06-14 11:19:18,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:18,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:18,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:18,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:18,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:18,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 271 transitions, 4239 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:18,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:18,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:18,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:18,763 INFO L124 PetriNetUnfolderBase]: 1808/3030 cut-off events. [2024-06-14 11:19:18,764 INFO L125 PetriNetUnfolderBase]: For 112102/112110 co-relation queries the response was YES. [2024-06-14 11:19:18,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20658 conditions, 3030 events. 1808/3030 cut-off events. For 112102/112110 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 18073 event pairs, 415 based on Foata normal form. 6/3031 useless extension candidates. Maximal degree in co-relation 20569. Up to 2186 conditions per place. [2024-06-14 11:19:18,796 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 178 changer transitions 0/302 dead transitions. [2024-06-14 11:19:18,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 302 transitions, 5315 flow [2024-06-14 11:19:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:19:18,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:19:18,798 INFO L175 Difference]: Start difference. First operand has 183 places, 271 transitions, 4239 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:19:18,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 302 transitions, 5315 flow [2024-06-14 11:19:19,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 302 transitions, 5135 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:19,075 INFO L231 Difference]: Finished difference. Result has 187 places, 282 transitions, 4615 flow [2024-06-14 11:19:19,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4615, PETRI_PLACES=187, PETRI_TRANSITIONS=282} [2024-06-14 11:19:19,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 11:19:19,075 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 282 transitions, 4615 flow [2024-06-14 11:19:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:19:19,076 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 821897968, now seen corresponding path program 2 times [2024-06-14 11:19:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683160125] [2024-06-14 11:19:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:19,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:19,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683160125] [2024-06-14 11:19:19,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683160125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:19,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:19,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:19,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028547170] [2024-06-14 11:19:19,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:19,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:19,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:19,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:19,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 282 transitions, 4615 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:19,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:19,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:19,637 INFO L124 PetriNetUnfolderBase]: 1850/3122 cut-off events. [2024-06-14 11:19:19,637 INFO L125 PetriNetUnfolderBase]: For 119266/119266 co-relation queries the response was YES. [2024-06-14 11:19:19,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21929 conditions, 3122 events. 1850/3122 cut-off events. For 119266/119266 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18806 event pairs, 351 based on Foata normal form. 2/3123 useless extension candidates. Maximal degree in co-relation 21839. Up to 2757 conditions per place. [2024-06-14 11:19:19,670 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 50 changer transitions 0/314 dead transitions. [2024-06-14 11:19:19,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 314 transitions, 5769 flow [2024-06-14 11:19:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:19:19,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 11:19:19,671 INFO L175 Difference]: Start difference. First operand has 187 places, 282 transitions, 4615 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:19:19,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 314 transitions, 5769 flow [2024-06-14 11:19:19,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 314 transitions, 5524 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:19,989 INFO L231 Difference]: Finished difference. Result has 194 places, 296 transitions, 4839 flow [2024-06-14 11:19:19,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4839, PETRI_PLACES=194, PETRI_TRANSITIONS=296} [2024-06-14 11:19:19,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 11:19:19,990 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 296 transitions, 4839 flow [2024-06-14 11:19:19,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:19,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:19:19,991 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:19,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1877076690, now seen corresponding path program 3 times [2024-06-14 11:19:19,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440388801] [2024-06-14 11:19:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440388801] [2024-06-14 11:19:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440388801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:20,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:20,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694016506] [2024-06-14 11:19:20,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:20,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:20,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 296 transitions, 4839 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:20,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:20,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:20,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:20,574 INFO L124 PetriNetUnfolderBase]: 1857/3141 cut-off events. [2024-06-14 11:19:20,574 INFO L125 PetriNetUnfolderBase]: For 122687/122687 co-relation queries the response was YES. [2024-06-14 11:19:20,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21769 conditions, 3141 events. 1857/3141 cut-off events. For 122687/122687 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19008 event pairs, 350 based on Foata normal form. 3/3143 useless extension candidates. Maximal degree in co-relation 21676. Up to 2430 conditions per place. [2024-06-14 11:19:20,607 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 146 changer transitions 0/331 dead transitions. [2024-06-14 11:19:20,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 331 transitions, 5919 flow [2024-06-14 11:19:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:19:20,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:19:20,608 INFO L175 Difference]: Start difference. First operand has 194 places, 296 transitions, 4839 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:19:20,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 331 transitions, 5919 flow [2024-06-14 11:19:20,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 331 transitions, 5833 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:20,875 INFO L231 Difference]: Finished difference. Result has 198 places, 301 transitions, 5158 flow [2024-06-14 11:19:20,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5158, PETRI_PLACES=198, PETRI_TRANSITIONS=301} [2024-06-14 11:19:20,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 11:19:20,876 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 301 transitions, 5158 flow [2024-06-14 11:19:20,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:20,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:20,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:20,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:19:20,877 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:20,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash 811371509, now seen corresponding path program 1 times [2024-06-14 11:19:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:20,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736735075] [2024-06-14 11:19:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:20,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:20,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:20,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736735075] [2024-06-14 11:19:20,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736735075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:20,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:20,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:20,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268914572] [2024-06-14 11:19:20,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:20,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:20,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:21,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:21,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 301 transitions, 5158 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:21,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:21,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:21,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:21,561 INFO L124 PetriNetUnfolderBase]: 1960/3281 cut-off events. [2024-06-14 11:19:21,561 INFO L125 PetriNetUnfolderBase]: For 149684/149684 co-relation queries the response was YES. [2024-06-14 11:19:21,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23386 conditions, 3281 events. 1960/3281 cut-off events. For 149684/149684 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19744 event pairs, 304 based on Foata normal form. 12/3288 useless extension candidates. Maximal degree in co-relation 23291. Up to 2400 conditions per place. [2024-06-14 11:19:21,613 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 104 changer transitions 0/345 dead transitions. [2024-06-14 11:19:21,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 345 transitions, 6390 flow [2024-06-14 11:19:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:19:21,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 11:19:21,614 INFO L175 Difference]: Start difference. First operand has 198 places, 301 transitions, 5158 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:19:21,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 345 transitions, 6390 flow [2024-06-14 11:19:22,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 345 transitions, 6236 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:22,043 INFO L231 Difference]: Finished difference. Result has 202 places, 307 transitions, 5320 flow [2024-06-14 11:19:22,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5320, PETRI_PLACES=202, PETRI_TRANSITIONS=307} [2024-06-14 11:19:22,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-14 11:19:22,044 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 307 transitions, 5320 flow [2024-06-14 11:19:22,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:22,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:19:22,045 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:22,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash 591174865, now seen corresponding path program 2 times [2024-06-14 11:19:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:22,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818975261] [2024-06-14 11:19:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:22,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818975261] [2024-06-14 11:19:22,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818975261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:22,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:22,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:22,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060139335] [2024-06-14 11:19:22,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:22,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:22,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:22,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 307 transitions, 5320 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:22,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:22,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:22,698 INFO L124 PetriNetUnfolderBase]: 2004/3346 cut-off events. [2024-06-14 11:19:22,698 INFO L125 PetriNetUnfolderBase]: For 151726/151726 co-relation queries the response was YES. [2024-06-14 11:19:22,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24198 conditions, 3346 events. 2004/3346 cut-off events. For 151726/151726 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20203 event pairs, 421 based on Foata normal form. 12/3353 useless extension candidates. Maximal degree in co-relation 24101. Up to 2714 conditions per place. [2024-06-14 11:19:22,733 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 99 changer transitions 0/340 dead transitions. [2024-06-14 11:19:22,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 340 transitions, 6386 flow [2024-06-14 11:19:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:19:22,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:19:22,734 INFO L175 Difference]: Start difference. First operand has 202 places, 307 transitions, 5320 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:19:22,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 340 transitions, 6386 flow [2024-06-14 11:19:23,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 340 transitions, 6210 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:23,042 INFO L231 Difference]: Finished difference. Result has 206 places, 310 transitions, 5405 flow [2024-06-14 11:19:23,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5405, PETRI_PLACES=206, PETRI_TRANSITIONS=310} [2024-06-14 11:19:23,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-14 11:19:23,043 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 310 transitions, 5405 flow [2024-06-14 11:19:23,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:23,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:23,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:19:23,043 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:23,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1029005665, now seen corresponding path program 1 times [2024-06-14 11:19:23,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:23,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601507655] [2024-06-14 11:19:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:23,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:23,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:23,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601507655] [2024-06-14 11:19:23,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601507655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:23,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:23,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928290651] [2024-06-14 11:19:23,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:23,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:23,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:23,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:23,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 310 transitions, 5405 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:23,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:23,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:23,602 INFO L124 PetriNetUnfolderBase]: 2030/3386 cut-off events. [2024-06-14 11:19:23,602 INFO L125 PetriNetUnfolderBase]: For 149940/149940 co-relation queries the response was YES. [2024-06-14 11:19:23,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24930 conditions, 3386 events. 2030/3386 cut-off events. For 149940/149940 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20462 event pairs, 441 based on Foata normal form. 2/3383 useless extension candidates. Maximal degree in co-relation 24831. Up to 2460 conditions per place. [2024-06-14 11:19:23,639 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 191 changer transitions 0/343 dead transitions. [2024-06-14 11:19:23,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 343 transitions, 6600 flow [2024-06-14 11:19:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:19:23,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:19:23,640 INFO L175 Difference]: Start difference. First operand has 206 places, 310 transitions, 5405 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:19:23,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 343 transitions, 6600 flow [2024-06-14 11:19:23,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 343 transitions, 6387 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:23,977 INFO L231 Difference]: Finished difference. Result has 209 places, 320 transitions, 5818 flow [2024-06-14 11:19:23,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5192, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5818, PETRI_PLACES=209, PETRI_TRANSITIONS=320} [2024-06-14 11:19:23,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-14 11:19:23,978 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 320 transitions, 5818 flow [2024-06-14 11:19:23,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:23,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:23,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:19:23,979 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:23,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:23,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1054695911, now seen corresponding path program 1 times [2024-06-14 11:19:23,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:23,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213575041] [2024-06-14 11:19:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:23,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:24,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:24,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213575041] [2024-06-14 11:19:24,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213575041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:24,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:24,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:24,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050062633] [2024-06-14 11:19:24,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:24,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:24,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:24,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 320 transitions, 5818 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:24,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:24,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:24,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:24,564 INFO L124 PetriNetUnfolderBase]: 2040/3403 cut-off events. [2024-06-14 11:19:24,564 INFO L125 PetriNetUnfolderBase]: For 157491/157491 co-relation queries the response was YES. [2024-06-14 11:19:24,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25539 conditions, 3403 events. 2040/3403 cut-off events. For 157491/157491 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20561 event pairs, 418 based on Foata normal form. 2/3400 useless extension candidates. Maximal degree in co-relation 25438. Up to 2804 conditions per place. [2024-06-14 11:19:24,599 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/346 dead transitions. [2024-06-14 11:19:24,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 346 transitions, 6808 flow [2024-06-14 11:19:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:19:24,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 11:19:24,600 INFO L175 Difference]: Start difference. First operand has 209 places, 320 transitions, 5818 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:19:24,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 346 transitions, 6808 flow [2024-06-14 11:19:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 346 transitions, 6551 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:24,984 INFO L231 Difference]: Finished difference. Result has 213 places, 324 transitions, 5832 flow [2024-06-14 11:19:24,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5832, PETRI_PLACES=213, PETRI_TRANSITIONS=324} [2024-06-14 11:19:24,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 11:19:24,985 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 324 transitions, 5832 flow [2024-06-14 11:19:24,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:24,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:24,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:24,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:19:24,985 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:24,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash 705702133, now seen corresponding path program 2 times [2024-06-14 11:19:24,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:24,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367104890] [2024-06-14 11:19:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:24,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367104890] [2024-06-14 11:19:25,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367104890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:25,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:25,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:25,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383852318] [2024-06-14 11:19:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:25,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:25,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:25,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:25,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 324 transitions, 5832 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:25,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:25,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:25,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:25,606 INFO L124 PetriNetUnfolderBase]: 2050/3419 cut-off events. [2024-06-14 11:19:25,607 INFO L125 PetriNetUnfolderBase]: For 163620/163620 co-relation queries the response was YES. [2024-06-14 11:19:25,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25515 conditions, 3419 events. 2050/3419 cut-off events. For 163620/163620 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20698 event pairs, 442 based on Foata normal form. 2/3416 useless extension candidates. Maximal degree in co-relation 25413. Up to 2472 conditions per place. [2024-06-14 11:19:25,646 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 185 changer transitions 0/348 dead transitions. [2024-06-14 11:19:25,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 348 transitions, 6920 flow [2024-06-14 11:19:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:19:25,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 11:19:25,647 INFO L175 Difference]: Start difference. First operand has 213 places, 324 transitions, 5832 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:19:25,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 348 transitions, 6920 flow [2024-06-14 11:19:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 348 transitions, 6708 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:26,071 INFO L231 Difference]: Finished difference. Result has 215 places, 328 transitions, 6076 flow [2024-06-14 11:19:26,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6076, PETRI_PLACES=215, PETRI_TRANSITIONS=328} [2024-06-14 11:19:26,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 11:19:26,072 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 328 transitions, 6076 flow [2024-06-14 11:19:26,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:26,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:26,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:26,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:19:26,073 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:26,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:26,073 INFO L85 PathProgramCache]: Analyzing trace with hash 878185513, now seen corresponding path program 3 times [2024-06-14 11:19:26,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:26,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840047984] [2024-06-14 11:19:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:26,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840047984] [2024-06-14 11:19:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840047984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:26,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202565493] [2024-06-14 11:19:26,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:26,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:26,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:26,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:26,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 328 transitions, 6076 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:26,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:26,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:26,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:26,750 INFO L124 PetriNetUnfolderBase]: 2044/3413 cut-off events. [2024-06-14 11:19:26,750 INFO L125 PetriNetUnfolderBase]: For 168956/168956 co-relation queries the response was YES. [2024-06-14 11:19:26,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25791 conditions, 3413 events. 2044/3413 cut-off events. For 168956/168956 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20667 event pairs, 442 based on Foata normal form. 2/3410 useless extension candidates. Maximal degree in co-relation 25688. Up to 2469 conditions per place. [2024-06-14 11:19:26,794 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 185 changer transitions 0/348 dead transitions. [2024-06-14 11:19:26,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 348 transitions, 7096 flow [2024-06-14 11:19:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:26,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:26,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:19:26,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 11:19:26,795 INFO L175 Difference]: Start difference. First operand has 215 places, 328 transitions, 6076 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:19:26,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 348 transitions, 7096 flow [2024-06-14 11:19:27,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 348 transitions, 6741 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:27,260 INFO L231 Difference]: Finished difference. Result has 218 places, 328 transitions, 6098 flow [2024-06-14 11:19:27,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6098, PETRI_PLACES=218, PETRI_TRANSITIONS=328} [2024-06-14 11:19:27,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 11:19:27,261 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 328 transitions, 6098 flow [2024-06-14 11:19:27,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:27,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:27,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:27,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:19:27,262 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:27,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash 141413913, now seen corresponding path program 2 times [2024-06-14 11:19:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682413961] [2024-06-14 11:19:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:27,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682413961] [2024-06-14 11:19:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682413961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:27,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:27,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:27,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59758266] [2024-06-14 11:19:27,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:27,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:27,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:27,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:27,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 328 transitions, 6098 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:27,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:27,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:27,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:27,883 INFO L124 PetriNetUnfolderBase]: 2054/3435 cut-off events. [2024-06-14 11:19:27,883 INFO L125 PetriNetUnfolderBase]: For 174920/174920 co-relation queries the response was YES. [2024-06-14 11:19:27,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26046 conditions, 3435 events. 2054/3435 cut-off events. For 174920/174920 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 20860 event pairs, 416 based on Foata normal form. 2/3432 useless extension candidates. Maximal degree in co-relation 25942. Up to 2820 conditions per place. [2024-06-14 11:19:27,924 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 96 changer transitions 0/355 dead transitions. [2024-06-14 11:19:27,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 355 transitions, 7244 flow [2024-06-14 11:19:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 11:19:27,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 11:19:27,925 INFO L175 Difference]: Start difference. First operand has 218 places, 328 transitions, 6098 flow. Second operand 8 states and 183 transitions. [2024-06-14 11:19:27,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 355 transitions, 7244 flow [2024-06-14 11:19:28,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 355 transitions, 6888 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:28,342 INFO L231 Difference]: Finished difference. Result has 222 places, 334 transitions, 6047 flow [2024-06-14 11:19:28,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6047, PETRI_PLACES=222, PETRI_TRANSITIONS=334} [2024-06-14 11:19:28,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 11:19:28,343 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 334 transitions, 6047 flow [2024-06-14 11:19:28,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:28,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:28,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:28,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:19:28,343 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:28,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1106829719, now seen corresponding path program 3 times [2024-06-14 11:19:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:28,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034786183] [2024-06-14 11:19:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:28,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:28,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:28,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034786183] [2024-06-14 11:19:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034786183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:28,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839618492] [2024-06-14 11:19:28,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:28,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:28,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:28,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:28,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 334 transitions, 6047 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:28,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:28,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:28,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:29,012 INFO L124 PetriNetUnfolderBase]: 2098/3497 cut-off events. [2024-06-14 11:19:29,012 INFO L125 PetriNetUnfolderBase]: For 192220/192220 co-relation queries the response was YES. [2024-06-14 11:19:29,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26143 conditions, 3497 events. 2098/3497 cut-off events. For 192220/192220 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21247 event pairs, 426 based on Foata normal form. 12/3504 useless extension candidates. Maximal degree in co-relation 26038. Up to 2844 conditions per place. [2024-06-14 11:19:29,047 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 255 selfloop transitions, 99 changer transitions 0/360 dead transitions. [2024-06-14 11:19:29,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 360 transitions, 7069 flow [2024-06-14 11:19:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 11:19:29,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:19:29,048 INFO L175 Difference]: Start difference. First operand has 222 places, 334 transitions, 6047 flow. Second operand 7 states and 168 transitions. [2024-06-14 11:19:29,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 360 transitions, 7069 flow [2024-06-14 11:19:29,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 360 transitions, 6929 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:29,522 INFO L231 Difference]: Finished difference. Result has 226 places, 337 transitions, 6166 flow [2024-06-14 11:19:29,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6166, PETRI_PLACES=226, PETRI_TRANSITIONS=337} [2024-06-14 11:19:29,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 11:19:29,523 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 337 transitions, 6166 flow [2024-06-14 11:19:29,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:29,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:29,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:29,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:19:29,523 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:29,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1107199115, now seen corresponding path program 1 times [2024-06-14 11:19:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:29,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988079478] [2024-06-14 11:19:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:29,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:29,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988079478] [2024-06-14 11:19:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988079478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:29,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:29,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:29,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811235875] [2024-06-14 11:19:29,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:29,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:29,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:29,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 337 transitions, 6166 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:29,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:29,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:29,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:30,128 INFO L124 PetriNetUnfolderBase]: 2106/3522 cut-off events. [2024-06-14 11:19:30,128 INFO L125 PetriNetUnfolderBase]: For 185976/185976 co-relation queries the response was YES. [2024-06-14 11:19:30,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26518 conditions, 3522 events. 2106/3522 cut-off events. For 185976/185976 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21414 event pairs, 388 based on Foata normal form. 2/3523 useless extension candidates. Maximal degree in co-relation 26411. Up to 3176 conditions per place. [2024-06-14 11:19:30,169 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 324 selfloop transitions, 27 changer transitions 0/357 dead transitions. [2024-06-14 11:19:30,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 357 transitions, 6960 flow [2024-06-14 11:19:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:19:30,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:19:30,171 INFO L175 Difference]: Start difference. First operand has 226 places, 337 transitions, 6166 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:19:30,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 357 transitions, 6960 flow [2024-06-14 11:19:30,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 357 transitions, 6741 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:30,539 INFO L231 Difference]: Finished difference. Result has 228 places, 339 transitions, 6058 flow [2024-06-14 11:19:30,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5947, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6058, PETRI_PLACES=228, PETRI_TRANSITIONS=339} [2024-06-14 11:19:30,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 11:19:30,540 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 339 transitions, 6058 flow [2024-06-14 11:19:30,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:30,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:30,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:30,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:19:30,540 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:30,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:30,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1259812291, now seen corresponding path program 3 times [2024-06-14 11:19:30,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:30,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951991797] [2024-06-14 11:19:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:30,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:30,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951991797] [2024-06-14 11:19:30,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951991797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:30,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:30,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:30,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176255843] [2024-06-14 11:19:30,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:30,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:30,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:30,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:30,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 339 transitions, 6058 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:30,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:30,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:30,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:31,162 INFO L124 PetriNetUnfolderBase]: 2103/3505 cut-off events. [2024-06-14 11:19:31,162 INFO L125 PetriNetUnfolderBase]: For 191174/191182 co-relation queries the response was YES. [2024-06-14 11:19:31,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26232 conditions, 3505 events. 2103/3505 cut-off events. For 191174/191182 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21311 event pairs, 422 based on Foata normal form. 4/3504 useless extension candidates. Maximal degree in co-relation 26124. Up to 2898 conditions per place. [2024-06-14 11:19:31,200 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 249 selfloop transitions, 103 changer transitions 0/358 dead transitions. [2024-06-14 11:19:31,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 358 transitions, 7016 flow [2024-06-14 11:19:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 11:19:31,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 11:19:31,201 INFO L175 Difference]: Start difference. First operand has 228 places, 339 transitions, 6058 flow. Second operand 7 states and 162 transitions. [2024-06-14 11:19:31,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 358 transitions, 7016 flow [2024-06-14 11:19:31,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 358 transitions, 6913 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:31,635 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 6167 flow [2024-06-14 11:19:31,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6167, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-14 11:19:31,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 11:19:31,635 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 6167 flow [2024-06-14 11:19:31,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:31,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:31,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:31,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:19:31,636 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:31,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash -295448249, now seen corresponding path program 4 times [2024-06-14 11:19:31,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:31,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284490625] [2024-06-14 11:19:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:31,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:31,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284490625] [2024-06-14 11:19:31,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284490625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:31,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:31,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:31,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895404457] [2024-06-14 11:19:31,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:31,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:31,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:31,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:31,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:31,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:31,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 6167 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:31,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:31,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:31,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:32,250 INFO L124 PetriNetUnfolderBase]: 2100/3497 cut-off events. [2024-06-14 11:19:32,250 INFO L125 PetriNetUnfolderBase]: For 197107/197115 co-relation queries the response was YES. [2024-06-14 11:19:32,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 3497 events. 2100/3497 cut-off events. For 197107/197115 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21211 event pairs, 428 based on Foata normal form. 4/3496 useless extension candidates. Maximal degree in co-relation 26360. Up to 2896 conditions per place. [2024-06-14 11:19:32,286 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 107 changer transitions 0/357 dead transitions. [2024-06-14 11:19:32,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 357 transitions, 7019 flow [2024-06-14 11:19:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:19:32,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:19:32,287 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 6167 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:19:32,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 357 transitions, 7019 flow [2024-06-14 11:19:32,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 357 transitions, 6793 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:32,709 INFO L231 Difference]: Finished difference. Result has 232 places, 339 transitions, 6161 flow [2024-06-14 11:19:32,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5941, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6161, PETRI_PLACES=232, PETRI_TRANSITIONS=339} [2024-06-14 11:19:32,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 11:19:32,710 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 339 transitions, 6161 flow [2024-06-14 11:19:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:32,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:32,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:32,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:19:32,710 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:32,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:32,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1259812477, now seen corresponding path program 4 times [2024-06-14 11:19:32,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:32,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744778240] [2024-06-14 11:19:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:32,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:32,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:32,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744778240] [2024-06-14 11:19:32,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744778240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:32,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:32,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:32,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239269] [2024-06-14 11:19:32,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:32,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:32,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:32,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:32,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 339 transitions, 6161 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:32,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:32,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:32,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:33,295 INFO L124 PetriNetUnfolderBase]: 2090/3478 cut-off events. [2024-06-14 11:19:33,295 INFO L125 PetriNetUnfolderBase]: For 202600/202608 co-relation queries the response was YES. [2024-06-14 11:19:33,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26392 conditions, 3478 events. 2090/3478 cut-off events. For 202600/202608 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21079 event pairs, 453 based on Foata normal form. 5/3478 useless extension candidates. Maximal degree in co-relation 26282. Up to 2545 conditions per place. [2024-06-14 11:19:33,337 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 209 changer transitions 0/359 dead transitions. [2024-06-14 11:19:33,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 359 transitions, 7239 flow [2024-06-14 11:19:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:19:33,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 11:19:33,343 INFO L175 Difference]: Start difference. First operand has 232 places, 339 transitions, 6161 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:19:33,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 359 transitions, 7239 flow [2024-06-14 11:19:33,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 359 transitions, 6997 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:33,847 INFO L231 Difference]: Finished difference. Result has 235 places, 339 transitions, 6350 flow [2024-06-14 11:19:33,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5925, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6350, PETRI_PLACES=235, PETRI_TRANSITIONS=339} [2024-06-14 11:19:33,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 11:19:33,848 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 339 transitions, 6350 flow [2024-06-14 11:19:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:33,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:33,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:33,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:19:33,849 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:33,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1269989467, now seen corresponding path program 5 times [2024-06-14 11:19:33,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:33,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451210] [2024-06-14 11:19:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:33,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:33,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451210] [2024-06-14 11:19:33,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:33,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:33,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345520527] [2024-06-14 11:19:33,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:33,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:33,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:33,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:33,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 339 transitions, 6350 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:33,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:33,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:33,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:34,474 INFO L124 PetriNetUnfolderBase]: 2084/3488 cut-off events. [2024-06-14 11:19:34,474 INFO L125 PetriNetUnfolderBase]: For 196519/196519 co-relation queries the response was YES. [2024-06-14 11:19:34,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26457 conditions, 3488 events. 2084/3488 cut-off events. For 196519/196519 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21211 event pairs, 385 based on Foata normal form. 2/3489 useless extension candidates. Maximal degree in co-relation 26346. Up to 3115 conditions per place. [2024-06-14 11:19:34,510 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 50 changer transitions 0/357 dead transitions. [2024-06-14 11:19:34,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 357 transitions, 7319 flow [2024-06-14 11:19:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:19:34,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 11:19:34,511 INFO L175 Difference]: Start difference. First operand has 235 places, 339 transitions, 6350 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:19:34,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 357 transitions, 7319 flow [2024-06-14 11:19:34,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 357 transitions, 6381 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-14 11:19:34,975 INFO L231 Difference]: Finished difference. Result has 230 places, 339 transitions, 5519 flow [2024-06-14 11:19:34,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5412, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5519, PETRI_PLACES=230, PETRI_TRANSITIONS=339} [2024-06-14 11:19:34,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 11:19:34,975 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 339 transitions, 5519 flow [2024-06-14 11:19:34,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:34,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:34,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:34,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:19:34,976 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:34,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2117308919, now seen corresponding path program 6 times [2024-06-14 11:19:34,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:34,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538104383] [2024-06-14 11:19:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:34,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:35,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:35,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538104383] [2024-06-14 11:19:35,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538104383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:35,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:35,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101258084] [2024-06-14 11:19:35,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:35,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:35,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:35,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:35,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 339 transitions, 5519 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:35,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:35,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:35,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:35,579 INFO L124 PetriNetUnfolderBase]: 2094/3509 cut-off events. [2024-06-14 11:19:35,579 INFO L125 PetriNetUnfolderBase]: For 196033/196035 co-relation queries the response was YES. [2024-06-14 11:19:35,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25685 conditions, 3509 events. 2094/3509 cut-off events. For 196033/196035 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21401 event pairs, 392 based on Foata normal form. 4/3512 useless extension candidates. Maximal degree in co-relation 25575. Up to 2778 conditions per place. [2024-06-14 11:19:35,616 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 130 changer transitions 0/366 dead transitions. [2024-06-14 11:19:35,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 366 transitions, 6700 flow [2024-06-14 11:19:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:19:35,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:19:35,618 INFO L175 Difference]: Start difference. First operand has 230 places, 339 transitions, 5519 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:19:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 366 transitions, 6700 flow [2024-06-14 11:19:36,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 366 transitions, 6582 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:36,126 INFO L231 Difference]: Finished difference. Result has 232 places, 343 transitions, 5747 flow [2024-06-14 11:19:36,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5747, PETRI_PLACES=232, PETRI_TRANSITIONS=343} [2024-06-14 11:19:36,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 11:19:36,126 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 343 transitions, 5747 flow [2024-06-14 11:19:36,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:36,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:36,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:36,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:19:36,127 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:36,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2117546069, now seen corresponding path program 7 times [2024-06-14 11:19:36,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:36,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944192992] [2024-06-14 11:19:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:36,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:36,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:36,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944192992] [2024-06-14 11:19:36,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944192992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:36,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:36,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:36,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330076813] [2024-06-14 11:19:36,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:36,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:36,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:36,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:36,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:36,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 343 transitions, 5747 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:36,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:36,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:36,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:36,744 INFO L124 PetriNetUnfolderBase]: 2088/3502 cut-off events. [2024-06-14 11:19:36,744 INFO L125 PetriNetUnfolderBase]: For 201104/201106 co-relation queries the response was YES. [2024-06-14 11:19:36,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25927 conditions, 3502 events. 2088/3502 cut-off events. For 201104/201106 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21400 event pairs, 392 based on Foata normal form. 4/3505 useless extension candidates. Maximal degree in co-relation 25816. Up to 2775 conditions per place. [2024-06-14 11:19:36,779 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 136 changer transitions 0/368 dead transitions. [2024-06-14 11:19:36,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 368 transitions, 6757 flow [2024-06-14 11:19:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:19:36,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 11:19:36,781 INFO L175 Difference]: Start difference. First operand has 232 places, 343 transitions, 5747 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:19:36,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 368 transitions, 6757 flow [2024-06-14 11:19:37,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 368 transitions, 6483 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:37,470 INFO L231 Difference]: Finished difference. Result has 235 places, 343 transitions, 5752 flow [2024-06-14 11:19:37,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5473, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5752, PETRI_PLACES=235, PETRI_TRANSITIONS=343} [2024-06-14 11:19:37,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 11:19:37,471 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 343 transitions, 5752 flow [2024-06-14 11:19:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:37,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:37,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:37,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:19:37,472 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:37,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1940414549, now seen corresponding path program 8 times [2024-06-14 11:19:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:37,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848577686] [2024-06-14 11:19:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:37,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:37,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848577686] [2024-06-14 11:19:37,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848577686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:37,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:37,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:37,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721197933] [2024-06-14 11:19:37,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:37,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:37,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:37,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:37,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:37,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 343 transitions, 5752 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:37,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:37,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:37,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:38,094 INFO L124 PetriNetUnfolderBase]: 2078/3485 cut-off events. [2024-06-14 11:19:38,094 INFO L125 PetriNetUnfolderBase]: For 203311/203311 co-relation queries the response was YES. [2024-06-14 11:19:38,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25770 conditions, 3485 events. 2078/3485 cut-off events. For 203311/203311 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21259 event pairs, 383 based on Foata normal form. 2/3486 useless extension candidates. Maximal degree in co-relation 25658. Up to 2767 conditions per place. [2024-06-14 11:19:38,131 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 148 changer transitions 0/373 dead transitions. [2024-06-14 11:19:38,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 373 transitions, 6902 flow [2024-06-14 11:19:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 11:19:38,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-14 11:19:38,132 INFO L175 Difference]: Start difference. First operand has 235 places, 343 transitions, 5752 flow. Second operand 8 states and 195 transitions. [2024-06-14 11:19:38,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 373 transitions, 6902 flow [2024-06-14 11:19:38,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 373 transitions, 6640 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:38,641 INFO L231 Difference]: Finished difference. Result has 238 places, 343 transitions, 5798 flow [2024-06-14 11:19:38,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=238, PETRI_TRANSITIONS=343} [2024-06-14 11:19:38,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 11:19:38,641 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 343 transitions, 5798 flow [2024-06-14 11:19:38,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:38,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:38,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:38,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:19:38,642 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:38,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2117669387, now seen corresponding path program 4 times [2024-06-14 11:19:38,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:38,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621570304] [2024-06-14 11:19:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:38,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:38,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:38,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621570304] [2024-06-14 11:19:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621570304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:38,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:38,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:38,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054952269] [2024-06-14 11:19:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:38,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:38,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:38,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:38,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:38,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:38,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 343 transitions, 5798 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:38,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:38,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:38,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:39,356 INFO L124 PetriNetUnfolderBase]: 2228/3731 cut-off events. [2024-06-14 11:19:39,356 INFO L125 PetriNetUnfolderBase]: For 294720/294722 co-relation queries the response was YES. [2024-06-14 11:19:39,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26768 conditions, 3731 events. 2228/3731 cut-off events. For 294720/294722 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22955 event pairs, 326 based on Foata normal form. 56/3786 useless extension candidates. Maximal degree in co-relation 26655. Up to 2754 conditions per place. [2024-06-14 11:19:39,394 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 107 changer transitions 1/382 dead transitions. [2024-06-14 11:19:39,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 382 transitions, 6830 flow [2024-06-14 11:19:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:19:39,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-14 11:19:39,395 INFO L175 Difference]: Start difference. First operand has 238 places, 343 transitions, 5798 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:19:39,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 382 transitions, 6830 flow [2024-06-14 11:19:39,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 382 transitions, 6367 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 11:19:39,968 INFO L231 Difference]: Finished difference. Result has 235 places, 345 transitions, 5607 flow [2024-06-14 11:19:39,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5607, PETRI_PLACES=235, PETRI_TRANSITIONS=345} [2024-06-14 11:19:39,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 11:19:39,968 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 345 transitions, 5607 flow [2024-06-14 11:19:39,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:39,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:39,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:39,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:19:39,969 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:39,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2117299991, now seen corresponding path program 2 times [2024-06-14 11:19:39,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:39,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330731600] [2024-06-14 11:19:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:39,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330731600] [2024-06-14 11:19:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330731600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:40,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:40,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:40,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118281198] [2024-06-14 11:19:40,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:40,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:40,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:40,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 345 transitions, 5607 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:40,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:40,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:40,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:40,636 INFO L124 PetriNetUnfolderBase]: 2226/3728 cut-off events. [2024-06-14 11:19:40,636 INFO L125 PetriNetUnfolderBase]: For 205472/205472 co-relation queries the response was YES. [2024-06-14 11:19:40,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26855 conditions, 3728 events. 2226/3728 cut-off events. For 205472/205472 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22925 event pairs, 430 based on Foata normal form. 2/3729 useless extension candidates. Maximal degree in co-relation 26742. Up to 3388 conditions per place. [2024-06-14 11:19:40,675 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 336 selfloop transitions, 22 changer transitions 0/364 dead transitions. [2024-06-14 11:19:40,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 364 transitions, 6417 flow [2024-06-14 11:19:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:19:40,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:19:40,676 INFO L175 Difference]: Start difference. First operand has 235 places, 345 transitions, 5607 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:19:40,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 364 transitions, 6417 flow [2024-06-14 11:19:41,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 364 transitions, 6175 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:41,270 INFO L231 Difference]: Finished difference. Result has 236 places, 347 transitions, 5470 flow [2024-06-14 11:19:41,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5470, PETRI_PLACES=236, PETRI_TRANSITIONS=347} [2024-06-14 11:19:41,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 11:19:41,271 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 347 transitions, 5470 flow [2024-06-14 11:19:41,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:41,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:41,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:41,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:19:41,271 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:41,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:41,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1939271777, now seen corresponding path program 3 times [2024-06-14 11:19:41,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048471322] [2024-06-14 11:19:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:41,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:41,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048471322] [2024-06-14 11:19:41,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048471322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:41,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:41,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437228109] [2024-06-14 11:19:41,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:41,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:41,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:41,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:41,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:41,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:41,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 347 transitions, 5470 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:41,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:41,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:41,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:41,897 INFO L124 PetriNetUnfolderBase]: 2234/3740 cut-off events. [2024-06-14 11:19:41,897 INFO L125 PetriNetUnfolderBase]: For 203327/203327 co-relation queries the response was YES. [2024-06-14 11:19:41,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26411 conditions, 3740 events. 2234/3740 cut-off events. For 203327/203327 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22975 event pairs, 432 based on Foata normal form. 2/3741 useless extension candidates. Maximal degree in co-relation 26297. Up to 3403 conditions per place. [2024-06-14 11:19:41,936 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 19 changer transitions 0/365 dead transitions. [2024-06-14 11:19:41,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 365 transitions, 6282 flow [2024-06-14 11:19:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 11:19:41,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 11:19:41,937 INFO L175 Difference]: Start difference. First operand has 236 places, 347 transitions, 5470 flow. Second operand 5 states and 118 transitions. [2024-06-14 11:19:41,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 365 transitions, 6282 flow [2024-06-14 11:19:42,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 365 transitions, 6191 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:42,474 INFO L231 Difference]: Finished difference. Result has 237 places, 349 transitions, 5480 flow [2024-06-14 11:19:42,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5480, PETRI_PLACES=237, PETRI_TRANSITIONS=349} [2024-06-14 11:19:42,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 11:19:42,475 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 349 transitions, 5480 flow [2024-06-14 11:19:42,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:42,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:42,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:42,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:19:42,476 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:42,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1939689347, now seen corresponding path program 4 times [2024-06-14 11:19:42,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:42,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075482089] [2024-06-14 11:19:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:42,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:42,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:42,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075482089] [2024-06-14 11:19:42,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075482089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:42,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:42,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:42,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616817177] [2024-06-14 11:19:42,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:42,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:42,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:42,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:42,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:42,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 349 transitions, 5480 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:42,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:42,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:42,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:43,140 INFO L124 PetriNetUnfolderBase]: 2229/3733 cut-off events. [2024-06-14 11:19:43,140 INFO L125 PetriNetUnfolderBase]: For 205674/205674 co-relation queries the response was YES. [2024-06-14 11:19:43,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26281 conditions, 3733 events. 2229/3733 cut-off events. For 205674/205674 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 22967 event pairs, 429 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 26166. Up to 3382 conditions per place. [2024-06-14 11:19:43,182 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 340 selfloop transitions, 23 changer transitions 0/369 dead transitions. [2024-06-14 11:19:43,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 369 transitions, 6308 flow [2024-06-14 11:19:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:19:43,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 11:19:43,183 INFO L175 Difference]: Start difference. First operand has 237 places, 349 transitions, 5480 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:19:43,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 369 transitions, 6308 flow [2024-06-14 11:19:43,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 369 transitions, 6223 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:43,737 INFO L231 Difference]: Finished difference. Result has 240 places, 351 transitions, 5508 flow [2024-06-14 11:19:43,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5508, PETRI_PLACES=240, PETRI_TRANSITIONS=351} [2024-06-14 11:19:43,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-14 11:19:43,738 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 351 transitions, 5508 flow [2024-06-14 11:19:43,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:43,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:43,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:43,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:19:43,738 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:43,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1496173279, now seen corresponding path program 1 times [2024-06-14 11:19:43,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453610869] [2024-06-14 11:19:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453610869] [2024-06-14 11:19:43,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453610869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:43,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:43,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:43,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47081582] [2024-06-14 11:19:43,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:43,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:43,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:43,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:43,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 351 transitions, 5508 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:43,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:43,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:43,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:44,458 INFO L124 PetriNetUnfolderBase]: 2332/3882 cut-off events. [2024-06-14 11:19:44,458 INFO L125 PetriNetUnfolderBase]: For 251750/251758 co-relation queries the response was YES. [2024-06-14 11:19:44,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27657 conditions, 3882 events. 2332/3882 cut-off events. For 251750/251758 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 23959 event pairs, 414 based on Foata normal form. 15/3892 useless extension candidates. Maximal degree in co-relation 27541. Up to 2990 conditions per place. [2024-06-14 11:19:44,500 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 115 changer transitions 0/387 dead transitions. [2024-06-14 11:19:44,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 387 transitions, 6704 flow [2024-06-14 11:19:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:19:44,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-14 11:19:44,501 INFO L175 Difference]: Start difference. First operand has 240 places, 351 transitions, 5508 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:19:44,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 387 transitions, 6704 flow [2024-06-14 11:19:44,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 387 transitions, 6607 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:44,927 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 5753 flow [2024-06-14 11:19:44,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5411, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5753, PETRI_PLACES=243, PETRI_TRANSITIONS=357} [2024-06-14 11:19:44,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 11:19:44,928 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 5753 flow [2024-06-14 11:19:44,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:44,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:44,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:44,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:19:44,928 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:44,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1499030239, now seen corresponding path program 2 times [2024-06-14 11:19:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:44,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613921291] [2024-06-14 11:19:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:45,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:45,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613921291] [2024-06-14 11:19:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613921291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:45,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:45,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:45,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097219470] [2024-06-14 11:19:45,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:45,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:45,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:45,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:45,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:45,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 357 transitions, 5753 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:45,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:45,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:45,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:45,643 INFO L124 PetriNetUnfolderBase]: 2376/3949 cut-off events. [2024-06-14 11:19:45,643 INFO L125 PetriNetUnfolderBase]: For 261336/261344 co-relation queries the response was YES. [2024-06-14 11:19:45,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28581 conditions, 3949 events. 2376/3949 cut-off events. For 261336/261344 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24379 event pairs, 501 based on Foata normal form. 15/3959 useless extension candidates. Maximal degree in co-relation 28464. Up to 3296 conditions per place. [2024-06-14 11:19:45,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 110 changer transitions 0/382 dead transitions. [2024-06-14 11:19:45,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 382 transitions, 6747 flow [2024-06-14 11:19:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:19:45,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 11:19:45,691 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 5753 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:19:45,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 382 transitions, 6747 flow [2024-06-14 11:19:46,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 382 transitions, 6531 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:46,117 INFO L231 Difference]: Finished difference. Result has 247 places, 360 transitions, 5826 flow [2024-06-14 11:19:46,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5551, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5826, PETRI_PLACES=247, PETRI_TRANSITIONS=360} [2024-06-14 11:19:46,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-14 11:19:46,117 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 360 transitions, 5826 flow [2024-06-14 11:19:46,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:46,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:46,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:19:46,118 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:46,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash -290970671, now seen corresponding path program 3 times [2024-06-14 11:19:46,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:46,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142277697] [2024-06-14 11:19:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:46,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142277697] [2024-06-14 11:19:46,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142277697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:46,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:46,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:46,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830193305] [2024-06-14 11:19:46,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:46,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:46,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:46,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:46,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:46,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:46,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 360 transitions, 5826 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:46,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:46,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:46,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:46,962 INFO L124 PetriNetUnfolderBase]: 2448/4076 cut-off events. [2024-06-14 11:19:46,962 INFO L125 PetriNetUnfolderBase]: For 282567/282567 co-relation queries the response was YES. [2024-06-14 11:19:46,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29514 conditions, 4076 events. 2448/4076 cut-off events. For 282567/282567 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25305 event pairs, 468 based on Foata normal form. 20/4095 useless extension candidates. Maximal degree in co-relation 29395. Up to 3637 conditions per place. [2024-06-14 11:19:47,010 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 337 selfloop transitions, 42 changer transitions 0/385 dead transitions. [2024-06-14 11:19:47,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 385 transitions, 6752 flow [2024-06-14 11:19:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 11:19:47,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 11:19:47,011 INFO L175 Difference]: Start difference. First operand has 247 places, 360 transitions, 5826 flow. Second operand 8 states and 175 transitions. [2024-06-14 11:19:47,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 385 transitions, 6752 flow [2024-06-14 11:19:47,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 385 transitions, 6507 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:47,475 INFO L231 Difference]: Finished difference. Result has 250 places, 365 transitions, 5781 flow [2024-06-14 11:19:47,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5781, PETRI_PLACES=250, PETRI_TRANSITIONS=365} [2024-06-14 11:19:47,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 11:19:47,475 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 365 transitions, 5781 flow [2024-06-14 11:19:47,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:47,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:47,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:47,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:19:47,476 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:47,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash -290785973, now seen corresponding path program 1 times [2024-06-14 11:19:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:47,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481916227] [2024-06-14 11:19:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:47,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:47,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:47,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481916227] [2024-06-14 11:19:47,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481916227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:47,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:47,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:47,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816031803] [2024-06-14 11:19:47,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:47,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:47,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:47,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:47,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:47,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:47,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 365 transitions, 5781 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:47,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:47,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:47,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:48,173 INFO L124 PetriNetUnfolderBase]: 2456/4090 cut-off events. [2024-06-14 11:19:48,173 INFO L125 PetriNetUnfolderBase]: For 255111/255111 co-relation queries the response was YES. [2024-06-14 11:19:48,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29546 conditions, 4090 events. 2456/4090 cut-off events. For 255111/255111 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25437 event pairs, 468 based on Foata normal form. 2/4091 useless extension candidates. Maximal degree in co-relation 29426. Up to 3743 conditions per place. [2024-06-14 11:19:48,218 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 353 selfloop transitions, 24 changer transitions 0/383 dead transitions. [2024-06-14 11:19:48,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 383 transitions, 6617 flow [2024-06-14 11:19:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 11:19:48,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-14 11:19:48,219 INFO L175 Difference]: Start difference. First operand has 250 places, 365 transitions, 5781 flow. Second operand 7 states and 149 transitions. [2024-06-14 11:19:48,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 383 transitions, 6617 flow [2024-06-14 11:19:48,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 383 transitions, 6495 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:48,760 INFO L231 Difference]: Finished difference. Result has 253 places, 368 transitions, 5768 flow [2024-06-14 11:19:48,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5768, PETRI_PLACES=253, PETRI_TRANSITIONS=368} [2024-06-14 11:19:48,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-14 11:19:48,761 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 368 transitions, 5768 flow [2024-06-14 11:19:48,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:48,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:48,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:19:48,762 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:48,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:48,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1940168657, now seen corresponding path program 4 times [2024-06-14 11:19:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989440068] [2024-06-14 11:19:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:48,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:48,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:48,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989440068] [2024-06-14 11:19:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989440068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:48,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:48,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144732704] [2024-06-14 11:19:48,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:48,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:48,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:48,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:48,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 368 transitions, 5768 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:48,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:48,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:48,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:49,608 INFO L124 PetriNetUnfolderBase]: 2619/4355 cut-off events. [2024-06-14 11:19:49,608 INFO L125 PetriNetUnfolderBase]: For 366717/366717 co-relation queries the response was YES. [2024-06-14 11:19:49,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30541 conditions, 4355 events. 2619/4355 cut-off events. For 366717/366717 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 27366 event pairs, 433 based on Foata normal form. 54/4408 useless extension candidates. Maximal degree in co-relation 30419. Up to 3307 conditions per place. [2024-06-14 11:19:49,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 286 selfloop transitions, 116 changer transitions 1/409 dead transitions. [2024-06-14 11:19:49,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 409 transitions, 6904 flow [2024-06-14 11:19:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:49,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 11:19:49,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-14 11:19:49,653 INFO L175 Difference]: Start difference. First operand has 253 places, 368 transitions, 5768 flow. Second operand 8 states and 202 transitions. [2024-06-14 11:19:49,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 409 transitions, 6904 flow [2024-06-14 11:19:50,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 409 transitions, 6821 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:50,205 INFO L231 Difference]: Finished difference. Result has 256 places, 371 transitions, 6018 flow [2024-06-14 11:19:50,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6018, PETRI_PLACES=256, PETRI_TRANSITIONS=371} [2024-06-14 11:19:50,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 11:19:50,205 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 371 transitions, 6018 flow [2024-06-14 11:19:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:50,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:50,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:50,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:19:50,206 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:50,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:50,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1939983959, now seen corresponding path program 2 times [2024-06-14 11:19:50,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:50,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911758603] [2024-06-14 11:19:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:50,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:50,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911758603] [2024-06-14 11:19:50,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911758603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:50,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:50,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:50,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706637227] [2024-06-14 11:19:50,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:50,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:50,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:50,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:50,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 371 transitions, 6018 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:50,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:50,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:50,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:50,994 INFO L124 PetriNetUnfolderBase]: 2622/4360 cut-off events. [2024-06-14 11:19:50,994 INFO L125 PetriNetUnfolderBase]: For 270209/270209 co-relation queries the response was YES. [2024-06-14 11:19:51,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31410 conditions, 4360 events. 2622/4360 cut-off events. For 270209/270209 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27340 event pairs, 515 based on Foata normal form. 2/4361 useless extension candidates. Maximal degree in co-relation 31287. Up to 4006 conditions per place. [2024-06-14 11:19:51,061 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 355 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-06-14 11:19:51,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 390 transitions, 6910 flow [2024-06-14 11:19:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 11:19:51,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:19:51,062 INFO L175 Difference]: Start difference. First operand has 256 places, 371 transitions, 6018 flow. Second operand 6 states and 132 transitions. [2024-06-14 11:19:51,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 390 transitions, 6910 flow [2024-06-14 11:19:51,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 390 transitions, 6630 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:51,902 INFO L231 Difference]: Finished difference. Result has 256 places, 376 transitions, 5898 flow [2024-06-14 11:19:51,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5898, PETRI_PLACES=256, PETRI_TRANSITIONS=376} [2024-06-14 11:19:51,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 11:19:51,903 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 376 transitions, 5898 flow [2024-06-14 11:19:51,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:51,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:51,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:51,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:19:51,903 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:51,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1712082809, now seen corresponding path program 3 times [2024-06-14 11:19:51,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:51,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350512798] [2024-06-14 11:19:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:52,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:52,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350512798] [2024-06-14 11:19:52,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350512798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:52,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:52,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:52,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933660900] [2024-06-14 11:19:52,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:52,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:52,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:52,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:52,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:52,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:52,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 376 transitions, 5898 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:52,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:52,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:52,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:52,798 INFO L124 PetriNetUnfolderBase]: 2630/4372 cut-off events. [2024-06-14 11:19:52,798 INFO L125 PetriNetUnfolderBase]: For 266275/266275 co-relation queries the response was YES. [2024-06-14 11:19:52,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30782 conditions, 4372 events. 2630/4372 cut-off events. For 266275/266275 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 27379 event pairs, 517 based on Foata normal form. 2/4373 useless extension candidates. Maximal degree in co-relation 30658. Up to 4012 conditions per place. [2024-06-14 11:19:52,843 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 356 selfloop transitions, 29 changer transitions 0/391 dead transitions. [2024-06-14 11:19:52,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 391 transitions, 6742 flow [2024-06-14 11:19:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 11:19:52,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:19:52,844 INFO L175 Difference]: Start difference. First operand has 256 places, 376 transitions, 5898 flow. Second operand 5 states and 115 transitions. [2024-06-14 11:19:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 391 transitions, 6742 flow [2024-06-14 11:19:53,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 391 transitions, 6668 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:53,434 INFO L231 Difference]: Finished difference. Result has 259 places, 378 transitions, 5939 flow [2024-06-14 11:19:53,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5939, PETRI_PLACES=259, PETRI_TRANSITIONS=378} [2024-06-14 11:19:53,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 11:19:53,434 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 378 transitions, 5939 flow [2024-06-14 11:19:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:53,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:53,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:53,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:19:53,435 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:53,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:53,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1645709259, now seen corresponding path program 4 times [2024-06-14 11:19:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:53,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547718961] [2024-06-14 11:19:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:53,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:53,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:53,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547718961] [2024-06-14 11:19:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547718961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:53,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405333662] [2024-06-14 11:19:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:53,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:53,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 378 transitions, 5939 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:53,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:53,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:53,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:54,137 INFO L124 PetriNetUnfolderBase]: 2625/4358 cut-off events. [2024-06-14 11:19:54,137 INFO L125 PetriNetUnfolderBase]: For 262031/262033 co-relation queries the response was YES. [2024-06-14 11:19:54,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30567 conditions, 4358 events. 2625/4358 cut-off events. For 262031/262033 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 27259 event pairs, 521 based on Foata normal form. 4/4361 useless extension candidates. Maximal degree in co-relation 30442. Up to 3991 conditions per place. [2024-06-14 11:19:54,184 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 355 selfloop transitions, 30 changer transitions 0/391 dead transitions. [2024-06-14 11:19:54,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 391 transitions, 6777 flow [2024-06-14 11:19:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 11:19:54,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 11:19:54,185 INFO L175 Difference]: Start difference. First operand has 259 places, 378 transitions, 5939 flow. Second operand 5 states and 112 transitions. [2024-06-14 11:19:54,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 391 transitions, 6777 flow [2024-06-14 11:19:54,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 391 transitions, 6688 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:54,770 INFO L231 Difference]: Finished difference. Result has 261 places, 380 transitions, 5961 flow [2024-06-14 11:19:54,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5961, PETRI_PLACES=261, PETRI_TRANSITIONS=380} [2024-06-14 11:19:54,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 11:19:54,771 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 380 transitions, 5961 flow [2024-06-14 11:19:54,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:54,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:54,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:19:54,772 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:54,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash -617285971, now seen corresponding path program 1 times [2024-06-14 11:19:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701786850] [2024-06-14 11:19:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:54,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:54,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701786850] [2024-06-14 11:19:54,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701786850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:54,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:54,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:54,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187808995] [2024-06-14 11:19:54,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:54,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:54,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:54,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:54,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:54,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 380 transitions, 5961 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:54,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:54,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:54,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:55,719 INFO L124 PetriNetUnfolderBase]: 2939/4872 cut-off events. [2024-06-14 11:19:55,719 INFO L125 PetriNetUnfolderBase]: For 424605/424605 co-relation queries the response was YES. [2024-06-14 11:19:55,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35473 conditions, 4872 events. 2939/4872 cut-off events. For 424605/424605 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 30909 event pairs, 576 based on Foata normal form. 36/4903 useless extension candidates. Maximal degree in co-relation 35347. Up to 2682 conditions per place. [2024-06-14 11:19:55,769 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 232 changer transitions 7/431 dead transitions. [2024-06-14 11:19:55,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 431 transitions, 7603 flow [2024-06-14 11:19:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 11:19:55,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-14 11:19:55,770 INFO L175 Difference]: Start difference. First operand has 261 places, 380 transitions, 5961 flow. Second operand 8 states and 209 transitions. [2024-06-14 11:19:55,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 431 transitions, 7603 flow [2024-06-14 11:19:56,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 431 transitions, 7512 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:56,616 INFO L231 Difference]: Finished difference. Result has 266 places, 383 transitions, 6420 flow [2024-06-14 11:19:56,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6420, PETRI_PLACES=266, PETRI_TRANSITIONS=383} [2024-06-14 11:19:56,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 11:19:56,616 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 383 transitions, 6420 flow [2024-06-14 11:19:56,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:56,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:56,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:19:56,617 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:56,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:56,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1725449001, now seen corresponding path program 2 times [2024-06-14 11:19:56,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:56,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636411999] [2024-06-14 11:19:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:56,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636411999] [2024-06-14 11:19:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636411999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:56,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893542548] [2024-06-14 11:19:56,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:56,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:56,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:56,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:56,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 383 transitions, 6420 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:56,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:56,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:56,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:57,547 INFO L124 PetriNetUnfolderBase]: 3021/5032 cut-off events. [2024-06-14 11:19:57,547 INFO L125 PetriNetUnfolderBase]: For 456169/456169 co-relation queries the response was YES. [2024-06-14 11:19:57,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37245 conditions, 5032 events. 3021/5032 cut-off events. For 456169/456169 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32300 event pairs, 791 based on Foata normal form. 42/5069 useless extension candidates. Maximal degree in co-relation 37118. Up to 3853 conditions per place. [2024-06-14 11:19:57,607 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 217 changer transitions 3/418 dead transitions. [2024-06-14 11:19:57,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 418 transitions, 7798 flow [2024-06-14 11:19:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 11:19:57,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-14 11:19:57,608 INFO L175 Difference]: Start difference. First operand has 266 places, 383 transitions, 6420 flow. Second operand 8 states and 198 transitions. [2024-06-14 11:19:57,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 418 transitions, 7798 flow [2024-06-14 11:19:58,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 418 transitions, 7452 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:58,607 INFO L231 Difference]: Finished difference. Result has 270 places, 384 transitions, 6568 flow [2024-06-14 11:19:58,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=270, PETRI_TRANSITIONS=384} [2024-06-14 11:19:58,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 11:19:58,607 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 384 transitions, 6568 flow [2024-06-14 11:19:58,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:58,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:58,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:58,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:19:58,608 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:58,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1146552657, now seen corresponding path program 3 times [2024-06-14 11:19:58,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:58,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828360100] [2024-06-14 11:19:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828360100] [2024-06-14 11:19:58,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828360100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:58,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:58,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:58,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785983283] [2024-06-14 11:19:58,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:58,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:58,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:58,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 384 transitions, 6568 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:58,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:58,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:58,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:59,524 INFO L124 PetriNetUnfolderBase]: 3119/5198 cut-off events. [2024-06-14 11:19:59,525 INFO L125 PetriNetUnfolderBase]: For 456317/456317 co-relation queries the response was YES. [2024-06-14 11:19:59,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38501 conditions, 5198 events. 3119/5198 cut-off events. For 456317/456317 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 33604 event pairs, 775 based on Foata normal form. 36/5229 useless extension candidates. Maximal degree in co-relation 38372. Up to 3809 conditions per place. [2024-06-14 11:19:59,583 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 220 changer transitions 6/425 dead transitions. [2024-06-14 11:19:59,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 425 transitions, 8000 flow [2024-06-14 11:19:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 11:19:59,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-14 11:19:59,584 INFO L175 Difference]: Start difference. First operand has 270 places, 384 transitions, 6568 flow. Second operand 8 states and 203 transitions. [2024-06-14 11:19:59,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 425 transitions, 8000 flow [2024-06-14 11:20:00,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 425 transitions, 7540 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:00,543 INFO L231 Difference]: Finished difference. Result has 272 places, 385 transitions, 6600 flow [2024-06-14 11:20:00,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6108, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6600, PETRI_PLACES=272, PETRI_TRANSITIONS=385} [2024-06-14 11:20:00,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 11:20:00,544 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 385 transitions, 6600 flow [2024-06-14 11:20:00,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:00,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:00,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:20:00,545 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:00,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -868507827, now seen corresponding path program 1 times [2024-06-14 11:20:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835597487] [2024-06-14 11:20:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:00,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:00,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835597487] [2024-06-14 11:20:00,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835597487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:00,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:00,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681345936] [2024-06-14 11:20:00,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:00,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:00,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:00,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:00,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:00,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:00,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 385 transitions, 6600 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) [2024-06-14 11:20:00,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:00,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:00,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:01,394 INFO L124 PetriNetUnfolderBase]: 3118/5212 cut-off events. [2024-06-14 11:20:01,394 INFO L125 PetriNetUnfolderBase]: For 397203/397213 co-relation queries the response was YES. [2024-06-14 11:20:01,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38998 conditions, 5212 events. 3118/5212 cut-off events. For 397203/397213 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33844 event pairs, 830 based on Foata normal form. 6/5216 useless extension candidates. Maximal degree in co-relation 38868. Up to 4538 conditions per place. [2024-06-14 11:20:01,456 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 104 changer transitions 0/416 dead transitions. [2024-06-14 11:20:01,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 416 transitions, 8108 flow [2024-06-14 11:20:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:20:01,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 11:20:01,457 INFO L175 Difference]: Start difference. First operand has 272 places, 385 transitions, 6600 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:20:01,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 416 transitions, 8108 flow [2024-06-14 11:20:02,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 416 transitions, 7621 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:02,360 INFO L231 Difference]: Finished difference. Result has 272 places, 397 transitions, 6561 flow [2024-06-14 11:20:02,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6561, PETRI_PLACES=272, PETRI_TRANSITIONS=397} [2024-06-14 11:20:02,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 11:20:02,361 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 397 transitions, 6561 flow [2024-06-14 11:20:02,361 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) [2024-06-14 11:20:02,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:02,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:02,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:20:02,361 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:02,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash -192841185, now seen corresponding path program 2 times [2024-06-14 11:20:02,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:02,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138403176] [2024-06-14 11:20:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:02,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:02,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138403176] [2024-06-14 11:20:02,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138403176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:02,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:02,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:02,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132782944] [2024-06-14 11:20:02,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:02,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:02,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:02,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:02,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 397 transitions, 6561 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) [2024-06-14 11:20:02,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:02,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:02,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:03,251 INFO L124 PetriNetUnfolderBase]: 3115/5206 cut-off events. [2024-06-14 11:20:03,251 INFO L125 PetriNetUnfolderBase]: For 400786/400796 co-relation queries the response was YES. [2024-06-14 11:20:03,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38386 conditions, 5206 events. 3115/5206 cut-off events. For 400786/400796 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33799 event pairs, 831 based on Foata normal form. 6/5210 useless extension candidates. Maximal degree in co-relation 38255. Up to 4535 conditions per place. [2024-06-14 11:20:03,311 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 307 selfloop transitions, 100 changer transitions 0/413 dead transitions. [2024-06-14 11:20:03,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 413 transitions, 7827 flow [2024-06-14 11:20:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:20:03,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 11:20:03,312 INFO L175 Difference]: Start difference. First operand has 272 places, 397 transitions, 6561 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:20:03,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 413 transitions, 7827 flow [2024-06-14 11:20:04,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 413 transitions, 7681 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 11:20:04,195 INFO L231 Difference]: Finished difference. Result has 276 places, 397 transitions, 6621 flow [2024-06-14 11:20:04,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6415, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6621, PETRI_PLACES=276, PETRI_TRANSITIONS=397} [2024-06-14 11:20:04,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-14 11:20:04,196 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 397 transitions, 6621 flow [2024-06-14 11:20:04,196 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) [2024-06-14 11:20:04,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:04,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:04,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:20:04,196 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:04,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash -198502095, now seen corresponding path program 3 times [2024-06-14 11:20:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:04,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178178416] [2024-06-14 11:20:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:04,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:04,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178178416] [2024-06-14 11:20:04,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178178416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:04,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:04,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:04,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739556170] [2024-06-14 11:20:04,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:04,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:04,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:04,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:04,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:04,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:04,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 397 transitions, 6621 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) [2024-06-14 11:20:04,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:04,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:04,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:05,149 INFO L124 PetriNetUnfolderBase]: 3112/5206 cut-off events. [2024-06-14 11:20:05,149 INFO L125 PetriNetUnfolderBase]: For 410416/410426 co-relation queries the response was YES. [2024-06-14 11:20:05,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38485 conditions, 5206 events. 3112/5206 cut-off events. For 410416/410426 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33859 event pairs, 830 based on Foata normal form. 11/5215 useless extension candidates. Maximal degree in co-relation 38353. Up to 4532 conditions per place. [2024-06-14 11:20:05,217 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 307 selfloop transitions, 105 changer transitions 0/418 dead transitions. [2024-06-14 11:20:05,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 418 transitions, 7777 flow [2024-06-14 11:20:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:20:05,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 11:20:05,218 INFO L175 Difference]: Start difference. First operand has 276 places, 397 transitions, 6621 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:20:05,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 418 transitions, 7777 flow [2024-06-14 11:20:06,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 418 transitions, 7578 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:06,137 INFO L231 Difference]: Finished difference. Result has 279 places, 397 transitions, 6638 flow [2024-06-14 11:20:06,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6638, PETRI_PLACES=279, PETRI_TRANSITIONS=397} [2024-06-14 11:20:06,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 11:20:06,137 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 397 transitions, 6638 flow [2024-06-14 11:20:06,137 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) [2024-06-14 11:20:06,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:06,138 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] [2024-06-14 11:20:06,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:20:06,138 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:06,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash -198382125, now seen corresponding path program 4 times [2024-06-14 11:20:06,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:06,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969352763] [2024-06-14 11:20:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:06,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:06,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:06,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969352763] [2024-06-14 11:20:06,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969352763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:06,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:06,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:06,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45420427] [2024-06-14 11:20:06,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:06,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:06,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:06,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:06,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 397 transitions, 6638 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:06,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:06,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:06,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:07,060 INFO L124 PetriNetUnfolderBase]: 3117/5195 cut-off events. [2024-06-14 11:20:07,060 INFO L125 PetriNetUnfolderBase]: For 420381/420381 co-relation queries the response was YES. [2024-06-14 11:20:07,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38612 conditions, 5195 events. 3117/5195 cut-off events. For 420381/420381 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33652 event pairs, 808 based on Foata normal form. 1/5191 useless extension candidates. Maximal degree in co-relation 38480. Up to 4538 conditions per place. [2024-06-14 11:20:07,120 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 118 changer transitions 0/425 dead transitions. [2024-06-14 11:20:07,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 425 transitions, 7876 flow [2024-06-14 11:20:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:20:07,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 11:20:07,121 INFO L175 Difference]: Start difference. First operand has 279 places, 397 transitions, 6638 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:20:07,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 425 transitions, 7876 flow [2024-06-14 11:20:08,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 425 transitions, 7471 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:08,062 INFO L231 Difference]: Finished difference. Result has 279 places, 400 transitions, 6529 flow [2024-06-14 11:20:08,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6529, PETRI_PLACES=279, PETRI_TRANSITIONS=400} [2024-06-14 11:20:08,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 11:20:08,062 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 400 transitions, 6529 flow [2024-06-14 11:20:08,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:08,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:08,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:08,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:20:08,063 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:08,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1664166153, now seen corresponding path program 1 times [2024-06-14 11:20:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:08,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287611212] [2024-06-14 11:20:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:08,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:08,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:08,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287611212] [2024-06-14 11:20:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287611212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:08,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:08,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265872175] [2024-06-14 11:20:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:08,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:08,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 400 transitions, 6529 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:08,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:08,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:08,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:09,006 INFO L124 PetriNetUnfolderBase]: 3143/5237 cut-off events. [2024-06-14 11:20:09,007 INFO L125 PetriNetUnfolderBase]: For 435947/435947 co-relation queries the response was YES. [2024-06-14 11:20:09,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39148 conditions, 5237 events. 3143/5237 cut-off events. For 435947/435947 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33969 event pairs, 832 based on Foata normal form. 2/5234 useless extension candidates. Maximal degree in co-relation 39017. Up to 4218 conditions per place. [2024-06-14 11:20:09,067 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 220 changer transitions 0/432 dead transitions. [2024-06-14 11:20:09,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 432 transitions, 8011 flow [2024-06-14 11:20:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 11:20:09,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 11:20:09,068 INFO L175 Difference]: Start difference. First operand has 279 places, 400 transitions, 6529 flow. Second operand 8 states and 190 transitions. [2024-06-14 11:20:09,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 432 transitions, 8011 flow [2024-06-14 11:20:09,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 432 transitions, 7875 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:09,878 INFO L231 Difference]: Finished difference. Result has 284 places, 408 transitions, 6982 flow [2024-06-14 11:20:09,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6393, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6982, PETRI_PLACES=284, PETRI_TRANSITIONS=408} [2024-06-14 11:20:09,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-14 11:20:09,879 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 408 transitions, 6982 flow [2024-06-14 11:20:09,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:09,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:09,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:20:09,880 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:09,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:09,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1664190891, now seen corresponding path program 5 times [2024-06-14 11:20:09,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:09,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355988073] [2024-06-14 11:20:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:09,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:09,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355988073] [2024-06-14 11:20:09,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355988073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:09,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:09,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:09,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809760895] [2024-06-14 11:20:09,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:09,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:09,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:09,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:09,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:09,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 408 transitions, 6982 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:09,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:09,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:09,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:10,739 INFO L124 PetriNetUnfolderBase]: 3140/5241 cut-off events. [2024-06-14 11:20:10,740 INFO L125 PetriNetUnfolderBase]: For 445082/445082 co-relation queries the response was YES. [2024-06-14 11:20:10,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39621 conditions, 5241 events. 3140/5241 cut-off events. For 445082/445082 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34088 event pairs, 800 based on Foata normal form. 1/5237 useless extension candidates. Maximal degree in co-relation 39488. Up to 4571 conditions per place. [2024-06-14 11:20:10,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 314 selfloop transitions, 108 changer transitions 0/428 dead transitions. [2024-06-14 11:20:10,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 428 transitions, 8312 flow [2024-06-14 11:20:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:20:10,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:20:10,799 INFO L175 Difference]: Start difference. First operand has 284 places, 408 transitions, 6982 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:20:10,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 428 transitions, 8312 flow [2024-06-14 11:20:11,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 428 transitions, 7820 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:11,694 INFO L231 Difference]: Finished difference. Result has 286 places, 408 transitions, 6714 flow [2024-06-14 11:20:11,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6714, PETRI_PLACES=286, PETRI_TRANSITIONS=408} [2024-06-14 11:20:11,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 11:20:11,694 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 408 transitions, 6714 flow [2024-06-14 11:20:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:11,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:11,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:11,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:20:11,695 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:11,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash 257838143, now seen corresponding path program 2 times [2024-06-14 11:20:11,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:11,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667712001] [2024-06-14 11:20:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:11,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:11,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:11,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667712001] [2024-06-14 11:20:11,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667712001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:11,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:11,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:11,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475096898] [2024-06-14 11:20:11,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:11,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:11,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:11,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:11,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 408 transitions, 6714 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:11,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:11,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:11,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:12,607 INFO L124 PetriNetUnfolderBase]: 3134/5222 cut-off events. [2024-06-14 11:20:12,607 INFO L125 PetriNetUnfolderBase]: For 451645/451645 co-relation queries the response was YES. [2024-06-14 11:20:12,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39117 conditions, 5222 events. 3134/5222 cut-off events. For 451645/451645 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33851 event pairs, 836 based on Foata normal form. 2/5219 useless extension candidates. Maximal degree in co-relation 38983. Up to 4211 conditions per place. [2024-06-14 11:20:12,667 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 218 changer transitions 0/431 dead transitions. [2024-06-14 11:20:12,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 431 transitions, 7916 flow [2024-06-14 11:20:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:20:12,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 11:20:12,668 INFO L175 Difference]: Start difference. First operand has 286 places, 408 transitions, 6714 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:20:12,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 431 transitions, 7916 flow [2024-06-14 11:20:13,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 431 transitions, 7710 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:13,642 INFO L231 Difference]: Finished difference. Result has 290 places, 408 transitions, 6951 flow [2024-06-14 11:20:13,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6508, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6951, PETRI_PLACES=290, PETRI_TRANSITIONS=408} [2024-06-14 11:20:13,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-14 11:20:13,643 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 408 transitions, 6951 flow [2024-06-14 11:20:13,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:13,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:13,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:13,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:20:13,643 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:13,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1784694849, now seen corresponding path program 6 times [2024-06-14 11:20:13,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:13,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389352415] [2024-06-14 11:20:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:13,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389352415] [2024-06-14 11:20:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389352415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:13,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202504423] [2024-06-14 11:20:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:13,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:13,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 408 transitions, 6951 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:13,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:13,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:13,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:14,558 INFO L124 PetriNetUnfolderBase]: 3131/5227 cut-off events. [2024-06-14 11:20:14,558 INFO L125 PetriNetUnfolderBase]: For 457871/457871 co-relation queries the response was YES. [2024-06-14 11:20:14,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39520 conditions, 5227 events. 3131/5227 cut-off events. For 457871/457871 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33942 event pairs, 801 based on Foata normal form. 1/5223 useless extension candidates. Maximal degree in co-relation 39385. Up to 4560 conditions per place. [2024-06-14 11:20:14,618 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 113 changer transitions 0/429 dead transitions. [2024-06-14 11:20:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 429 transitions, 8147 flow [2024-06-14 11:20:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 11:20:14,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 11:20:14,619 INFO L175 Difference]: Start difference. First operand has 290 places, 408 transitions, 6951 flow. Second operand 9 states and 199 transitions. [2024-06-14 11:20:14,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 429 transitions, 8147 flow [2024-06-14 11:20:15,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 429 transitions, 7700 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:15,648 INFO L231 Difference]: Finished difference. Result has 292 places, 408 transitions, 6736 flow [2024-06-14 11:20:15,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6504, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6736, PETRI_PLACES=292, PETRI_TRANSITIONS=408} [2024-06-14 11:20:15,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 11:20:15,649 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 408 transitions, 6736 flow [2024-06-14 11:20:15,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:15,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:15,649 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] [2024-06-14 11:20:15,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:20:15,649 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:15,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1461299617, now seen corresponding path program 3 times [2024-06-14 11:20:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769836098] [2024-06-14 11:20:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:15,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:15,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:15,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769836098] [2024-06-14 11:20:15,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769836098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:15,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:15,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:15,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067250922] [2024-06-14 11:20:15,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:15,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:15,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:15,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:15,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 408 transitions, 6736 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:15,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:15,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:15,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:16,640 INFO L124 PetriNetUnfolderBase]: 3165/5279 cut-off events. [2024-06-14 11:20:16,640 INFO L125 PetriNetUnfolderBase]: For 480829/480829 co-relation queries the response was YES. [2024-06-14 11:20:16,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39991 conditions, 5279 events. 3165/5279 cut-off events. For 480829/480829 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34306 event pairs, 836 based on Foata normal form. 2/5276 useless extension candidates. Maximal degree in co-relation 39855. Up to 4243 conditions per place. [2024-06-14 11:20:16,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 214 changer transitions 0/441 dead transitions. [2024-06-14 11:20:16,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 441 transitions, 8310 flow [2024-06-14 11:20:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 11:20:16,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 11:20:16,705 INFO L175 Difference]: Start difference. First operand has 292 places, 408 transitions, 6736 flow. Second operand 9 states and 205 transitions. [2024-06-14 11:20:16,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 441 transitions, 8310 flow [2024-06-14 11:20:17,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 441 transitions, 7980 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:17,776 INFO L231 Difference]: Finished difference. Result has 291 places, 418 transitions, 7017 flow [2024-06-14 11:20:17,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6406, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7017, PETRI_PLACES=291, PETRI_TRANSITIONS=418} [2024-06-14 11:20:17,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 11:20:17,776 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 418 transitions, 7017 flow [2024-06-14 11:20:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:17,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:17,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:20:17,777 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:17,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1453947967, now seen corresponding path program 4 times [2024-06-14 11:20:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47698460] [2024-06-14 11:20:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:17,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:17,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47698460] [2024-06-14 11:20:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47698460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:17,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:17,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:17,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464998771] [2024-06-14 11:20:17,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:17,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:17,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:17,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:17,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 418 transitions, 7017 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:17,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:17,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:17,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:18,742 INFO L124 PetriNetUnfolderBase]: 3167/5276 cut-off events. [2024-06-14 11:20:18,742 INFO L125 PetriNetUnfolderBase]: For 488751/488751 co-relation queries the response was YES. [2024-06-14 11:20:18,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40399 conditions, 5276 events. 3167/5276 cut-off events. For 488751/488751 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 34227 event pairs, 842 based on Foata normal form. 2/5273 useless extension candidates. Maximal degree in co-relation 40263. Up to 4244 conditions per place. [2024-06-14 11:20:18,806 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 216 changer transitions 0/441 dead transitions. [2024-06-14 11:20:18,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 441 transitions, 8305 flow [2024-06-14 11:20:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 11:20:18,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 11:20:18,807 INFO L175 Difference]: Start difference. First operand has 291 places, 418 transitions, 7017 flow. Second operand 8 states and 186 transitions. [2024-06-14 11:20:18,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 441 transitions, 8305 flow [2024-06-14 11:20:20,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 441 transitions, 7907 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:20,054 INFO L231 Difference]: Finished difference. Result has 294 places, 421 transitions, 7122 flow [2024-06-14 11:20:20,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7122, PETRI_PLACES=294, PETRI_TRANSITIONS=421} [2024-06-14 11:20:20,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 11:20:20,055 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 421 transitions, 7122 flow [2024-06-14 11:20:20,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:20,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:20,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:20,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:20:20,055 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:20,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 209541971, now seen corresponding path program 5 times [2024-06-14 11:20:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:20,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921876780] [2024-06-14 11:20:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:20,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:20,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:20,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921876780] [2024-06-14 11:20:20,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921876780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:20,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:20,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:20,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269166313] [2024-06-14 11:20:20,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:20,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:20,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:20,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:20,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:20,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 421 transitions, 7122 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:20,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:20,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:20,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:20,956 INFO L124 PetriNetUnfolderBase]: 3177/5307 cut-off events. [2024-06-14 11:20:20,956 INFO L125 PetriNetUnfolderBase]: For 502447/502447 co-relation queries the response was YES. [2024-06-14 11:20:21,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40668 conditions, 5307 events. 3177/5307 cut-off events. For 502447/502447 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34596 event pairs, 824 based on Foata normal form. 2/5304 useless extension candidates. Maximal degree in co-relation 40530. Up to 4254 conditions per place. [2024-06-14 11:20:21,022 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 224 changer transitions 0/449 dead transitions. [2024-06-14 11:20:21,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 449 transitions, 8655 flow [2024-06-14 11:20:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 11:20:21,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:20:21,023 INFO L175 Difference]: Start difference. First operand has 294 places, 421 transitions, 7122 flow. Second operand 9 states and 207 transitions. [2024-06-14 11:20:21,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 449 transitions, 8655 flow [2024-06-14 11:20:22,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 449 transitions, 8324 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:22,351 INFO L231 Difference]: Finished difference. Result has 298 places, 427 transitions, 7375 flow [2024-06-14 11:20:22,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6796, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7375, PETRI_PLACES=298, PETRI_TRANSITIONS=427} [2024-06-14 11:20:22,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-14 11:20:22,351 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 427 transitions, 7375 flow [2024-06-14 11:20:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:22,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:22,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:22,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:20:22,352 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:22,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1461176485, now seen corresponding path program 4 times [2024-06-14 11:20:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060613848] [2024-06-14 11:20:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:22,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060613848] [2024-06-14 11:20:22,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060613848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:22,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:22,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:22,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166491188] [2024-06-14 11:20:22,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:22,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:22,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:22,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 427 transitions, 7375 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:22,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:22,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:22,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:23,498 INFO L124 PetriNetUnfolderBase]: 3309/5508 cut-off events. [2024-06-14 11:20:23,498 INFO L125 PetriNetUnfolderBase]: For 647429/647429 co-relation queries the response was YES. [2024-06-14 11:20:23,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42023 conditions, 5508 events. 3309/5508 cut-off events. For 647429/647429 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36053 event pairs, 890 based on Foata normal form. 42/5545 useless extension candidates. Maximal degree in co-relation 41883. Up to 4272 conditions per place. [2024-06-14 11:20:23,584 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 222 changer transitions 3/455 dead transitions. [2024-06-14 11:20:23,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 455 transitions, 8733 flow [2024-06-14 11:20:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 11:20:23,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 11:20:23,585 INFO L175 Difference]: Start difference. First operand has 298 places, 427 transitions, 7375 flow. Second operand 8 states and 191 transitions. [2024-06-14 11:20:23,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 455 transitions, 8733 flow [2024-06-14 11:20:25,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 455 transitions, 8207 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:25,145 INFO L231 Difference]: Finished difference. Result has 300 places, 428 transitions, 7356 flow [2024-06-14 11:20:25,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7356, PETRI_PLACES=300, PETRI_TRANSITIONS=428} [2024-06-14 11:20:25,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-14 11:20:25,146 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 428 transitions, 7356 flow [2024-06-14 11:20:25,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:25,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:25,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:25,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:20:25,146 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:25,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:25,147 INFO L85 PathProgramCache]: Analyzing trace with hash -47689623, now seen corresponding path program 5 times [2024-06-14 11:20:25,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:25,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966000546] [2024-06-14 11:20:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:25,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:25,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:25,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966000546] [2024-06-14 11:20:25,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966000546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:25,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:25,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:25,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913794095] [2024-06-14 11:20:25,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:25,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:25,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:25,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:25,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 428 transitions, 7356 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:25,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:25,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:25,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:26,213 INFO L124 PetriNetUnfolderBase]: 3431/5734 cut-off events. [2024-06-14 11:20:26,213 INFO L125 PetriNetUnfolderBase]: For 661980/661980 co-relation queries the response was YES. [2024-06-14 11:20:26,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43308 conditions, 5734 events. 3431/5734 cut-off events. For 661980/661980 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37964 event pairs, 950 based on Foata normal form. 42/5771 useless extension candidates. Maximal degree in co-relation 43167. Up to 4474 conditions per place. [2024-06-14 11:20:26,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 222 changer transitions 3/456 dead transitions. [2024-06-14 11:20:26,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 456 transitions, 8724 flow [2024-06-14 11:20:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:20:26,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:20:26,287 INFO L175 Difference]: Start difference. First operand has 300 places, 428 transitions, 7356 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:20:26,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 456 transitions, 8724 flow [2024-06-14 11:20:27,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 456 transitions, 8246 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:27,666 INFO L231 Difference]: Finished difference. Result has 302 places, 429 transitions, 7389 flow [2024-06-14 11:20:27,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6878, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7389, PETRI_PLACES=302, PETRI_TRANSITIONS=429} [2024-06-14 11:20:27,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 11:20:27,667 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 429 transitions, 7389 flow [2024-06-14 11:20:27,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:27,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:27,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:27,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:20:27,667 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:27,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash 592191235, now seen corresponding path program 6 times [2024-06-14 11:20:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366625260] [2024-06-14 11:20:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:27,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:27,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366625260] [2024-06-14 11:20:27,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366625260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:27,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:27,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321965770] [2024-06-14 11:20:27,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:27,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:27,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:27,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:27,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 429 transitions, 7389 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:27,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:27,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:27,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:28,814 INFO L124 PetriNetUnfolderBase]: 3529/5900 cut-off events. [2024-06-14 11:20:28,814 INFO L125 PetriNetUnfolderBase]: For 659551/659551 co-relation queries the response was YES. [2024-06-14 11:20:28,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44117 conditions, 5900 events. 3529/5900 cut-off events. For 659551/659551 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39339 event pairs, 934 based on Foata normal form. 36/5931 useless extension candidates. Maximal degree in co-relation 43975. Up to 4246 conditions per place. [2024-06-14 11:20:28,887 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 227 changer transitions 6/463 dead transitions. [2024-06-14 11:20:28,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 463 transitions, 8813 flow [2024-06-14 11:20:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:20:28,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:20:28,888 INFO L175 Difference]: Start difference. First operand has 302 places, 429 transitions, 7389 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:20:28,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 463 transitions, 8813 flow [2024-06-14 11:20:30,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 463 transitions, 8331 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:30,503 INFO L231 Difference]: Finished difference. Result has 304 places, 430 transitions, 7423 flow [2024-06-14 11:20:30,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6907, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7423, PETRI_PLACES=304, PETRI_TRANSITIONS=430} [2024-06-14 11:20:30,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 11:20:30,504 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 430 transitions, 7423 flow [2024-06-14 11:20:30,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:30,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:30,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:30,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:20:30,504 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:30,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:30,505 INFO L85 PathProgramCache]: Analyzing trace with hash -36565149, now seen corresponding path program 1 times [2024-06-14 11:20:30,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:30,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988784312] [2024-06-14 11:20:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:30,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:30,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:30,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988784312] [2024-06-14 11:20:30,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988784312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:30,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:30,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:30,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19446608] [2024-06-14 11:20:30,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:30,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:30,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:30,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:30,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:30,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:30,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 430 transitions, 7423 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:30,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:30,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:30,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:31,645 INFO L124 PetriNetUnfolderBase]: 3741/6286 cut-off events. [2024-06-14 11:20:31,645 INFO L125 PetriNetUnfolderBase]: For 733682/733682 co-relation queries the response was YES. [2024-06-14 11:20:31,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47748 conditions, 6286 events. 3741/6286 cut-off events. For 733682/733682 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42635 event pairs, 988 based on Foata normal form. 36/6317 useless extension candidates. Maximal degree in co-relation 47605. Up to 4202 conditions per place. [2024-06-14 11:20:31,726 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 220 changer transitions 0/467 dead transitions. [2024-06-14 11:20:31,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 467 transitions, 9071 flow [2024-06-14 11:20:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:31,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 11:20:31,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:20:31,727 INFO L175 Difference]: Start difference. First operand has 304 places, 430 transitions, 7423 flow. Second operand 8 states and 196 transitions. [2024-06-14 11:20:31,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 467 transitions, 9071 flow [2024-06-14 11:20:33,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 467 transitions, 8574 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:33,415 INFO L231 Difference]: Finished difference. Result has 307 places, 434 transitions, 7516 flow [2024-06-14 11:20:33,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7516, PETRI_PLACES=307, PETRI_TRANSITIONS=434} [2024-06-14 11:20:33,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 11:20:33,416 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 434 transitions, 7516 flow [2024-06-14 11:20:33,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:33,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:33,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:33,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:20:33,417 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:33,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:33,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1452755629, now seen corresponding path program 6 times [2024-06-14 11:20:33,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:33,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124171938] [2024-06-14 11:20:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:33,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:33,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:33,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124171938] [2024-06-14 11:20:33,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124171938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:33,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:33,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:33,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172773719] [2024-06-14 11:20:33,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:33,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:33,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:33,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:33,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:33,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 434 transitions, 7516 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:33,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:33,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:33,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:34,606 INFO L124 PetriNetUnfolderBase]: 3738/6281 cut-off events. [2024-06-14 11:20:34,606 INFO L125 PetriNetUnfolderBase]: For 633966/633974 co-relation queries the response was YES. [2024-06-14 11:20:34,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47797 conditions, 6281 events. 3738/6281 cut-off events. For 633966/633974 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42778 event pairs, 1068 based on Foata normal form. 4/6280 useless extension candidates. Maximal degree in co-relation 47652. Up to 5188 conditions per place. [2024-06-14 11:20:34,700 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 244 changer transitions 0/457 dead transitions. [2024-06-14 11:20:34,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 457 transitions, 9162 flow [2024-06-14 11:20:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 11:20:34,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 11:20:34,701 INFO L175 Difference]: Start difference. First operand has 307 places, 434 transitions, 7516 flow. Second operand 8 states and 186 transitions. [2024-06-14 11:20:34,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 457 transitions, 9162 flow [2024-06-14 11:20:36,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 457 transitions, 8841 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:36,324 INFO L231 Difference]: Finished difference. Result has 311 places, 435 transitions, 7717 flow [2024-06-14 11:20:36,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7195, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7717, PETRI_PLACES=311, PETRI_TRANSITIONS=435} [2024-06-14 11:20:36,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 11:20:36,325 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 435 transitions, 7717 flow [2024-06-14 11:20:36,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:36,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:36,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:36,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:20:36,325 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:36,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash 290924785, now seen corresponding path program 7 times [2024-06-14 11:20:36,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:36,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978683880] [2024-06-14 11:20:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:36,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:36,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978683880] [2024-06-14 11:20:36,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978683880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:36,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:36,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:36,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091342471] [2024-06-14 11:20:36,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:36,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:36,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:36,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:36,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:36,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 435 transitions, 7717 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:36,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:36,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:36,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:37,679 INFO L124 PetriNetUnfolderBase]: 3743/6288 cut-off events. [2024-06-14 11:20:37,679 INFO L125 PetriNetUnfolderBase]: For 643199/643207 co-relation queries the response was YES. [2024-06-14 11:20:37,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48170 conditions, 6288 events. 3743/6288 cut-off events. For 643199/643207 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42831 event pairs, 1068 based on Foata normal form. 4/6287 useless extension candidates. Maximal degree in co-relation 48023. Up to 5192 conditions per place. [2024-06-14 11:20:37,774 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-14 11:20:37,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 459 transitions, 9244 flow [2024-06-14 11:20:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:20:37,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 11:20:37,775 INFO L175 Difference]: Start difference. First operand has 311 places, 435 transitions, 7717 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:20:37,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 459 transitions, 9244 flow [2024-06-14 11:20:39,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 459 transitions, 8547 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:39,488 INFO L231 Difference]: Finished difference. Result has 312 places, 438 transitions, 7607 flow [2024-06-14 11:20:39,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7607, PETRI_PLACES=312, PETRI_TRANSITIONS=438} [2024-06-14 11:20:39,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-14 11:20:39,489 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 438 transitions, 7607 flow [2024-06-14 11:20:39,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:39,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:39,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:39,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:20:39,489 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:39,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:39,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1995581233, now seen corresponding path program 7 times [2024-06-14 11:20:39,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:39,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584630446] [2024-06-14 11:20:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:39,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:39,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584630446] [2024-06-14 11:20:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584630446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:39,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:39,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:20:39,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435728929] [2024-06-14 11:20:39,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:39,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:20:39,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:20:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:20:39,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:39,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 438 transitions, 7607 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:39,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:39,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:39,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:40,707 INFO L124 PetriNetUnfolderBase]: 3740/6314 cut-off events. [2024-06-14 11:20:40,708 INFO L125 PetriNetUnfolderBase]: For 651683/651693 co-relation queries the response was YES. [2024-06-14 11:20:40,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47861 conditions, 6314 events. 3740/6314 cut-off events. For 651683/651693 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 43237 event pairs, 1089 based on Foata normal form. 6/6318 useless extension candidates. Maximal degree in co-relation 47714. Up to 5560 conditions per place. [2024-06-14 11:20:40,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 345 selfloop transitions, 102 changer transitions 0/453 dead transitions. [2024-06-14 11:20:40,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 453 transitions, 8707 flow [2024-06-14 11:20:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:20:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:20:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 11:20:40,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 11:20:40,799 INFO L175 Difference]: Start difference. First operand has 312 places, 438 transitions, 7607 flow. Second operand 7 states and 156 transitions. [2024-06-14 11:20:40,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 453 transitions, 8707 flow [2024-06-14 11:20:43,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 453 transitions, 8272 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:43,054 INFO L231 Difference]: Finished difference. Result has 314 places, 438 transitions, 7382 flow [2024-06-14 11:20:43,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7172, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7382, PETRI_PLACES=314, PETRI_TRANSITIONS=438} [2024-06-14 11:20:43,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-14 11:20:43,055 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 438 transitions, 7382 flow [2024-06-14 11:20:43,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:43,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:43,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:43,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:20:43,055 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:43,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash -483414125, now seen corresponding path program 8 times [2024-06-14 11:20:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:43,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733950358] [2024-06-14 11:20:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:43,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:43,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733950358] [2024-06-14 11:20:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733950358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:43,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494496409] [2024-06-14 11:20:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:43,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:43,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 438 transitions, 7382 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:43,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:43,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:43,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:44,223 INFO L124 PetriNetUnfolderBase]: 3737/6281 cut-off events. [2024-06-14 11:20:44,223 INFO L125 PetriNetUnfolderBase]: For 660439/660447 co-relation queries the response was YES. [2024-06-14 11:20:44,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47417 conditions, 6281 events. 3737/6281 cut-off events. For 660439/660447 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42834 event pairs, 1074 based on Foata normal form. 4/6280 useless extension candidates. Maximal degree in co-relation 47269. Up to 5188 conditions per place. [2024-06-14 11:20:44,304 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 257 changer transitions 0/459 dead transitions. [2024-06-14 11:20:44,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 459 transitions, 8854 flow [2024-06-14 11:20:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:20:44,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 11:20:44,305 INFO L175 Difference]: Start difference. First operand has 314 places, 438 transitions, 7382 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:20:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 459 transitions, 8854 flow [2024-06-14 11:20:46,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 8745 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:46,140 INFO L231 Difference]: Finished difference. Result has 319 places, 438 transitions, 7793 flow [2024-06-14 11:20:46,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7273, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7793, PETRI_PLACES=319, PETRI_TRANSITIONS=438} [2024-06-14 11:20:46,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 11:20:46,140 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 438 transitions, 7793 flow [2024-06-14 11:20:46,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:46,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:46,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:20:46,141 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:46,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:46,141 INFO L85 PathProgramCache]: Analyzing trace with hash 399481963, now seen corresponding path program 9 times [2024-06-14 11:20:46,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:46,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434178425] [2024-06-14 11:20:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:46,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:46,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434178425] [2024-06-14 11:20:46,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434178425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:46,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:46,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191221469] [2024-06-14 11:20:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:46,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:46,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:46,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:46,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:46,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 438 transitions, 7793 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:46,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:46,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:46,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,361 INFO L124 PetriNetUnfolderBase]: 3734/6278 cut-off events. [2024-06-14 11:20:47,361 INFO L125 PetriNetUnfolderBase]: For 675026/675034 co-relation queries the response was YES. [2024-06-14 11:20:47,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48004 conditions, 6278 events. 3734/6278 cut-off events. For 675026/675034 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42823 event pairs, 1074 based on Foata normal form. 4/6277 useless extension candidates. Maximal degree in co-relation 47854. Up to 5186 conditions per place. [2024-06-14 11:20:47,446 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 247 changer transitions 0/459 dead transitions. [2024-06-14 11:20:47,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 459 transitions, 9271 flow [2024-06-14 11:20:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 11:20:47,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:20:47,447 INFO L175 Difference]: Start difference. First operand has 319 places, 438 transitions, 7793 flow. Second operand 8 states and 184 transitions. [2024-06-14 11:20:47,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 459 transitions, 9271 flow [2024-06-14 11:20:49,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 459 transitions, 8392 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:49,767 INFO L231 Difference]: Finished difference. Result has 316 places, 438 transitions, 7414 flow [2024-06-14 11:20:49,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7414, PETRI_PLACES=316, PETRI_TRANSITIONS=438} [2024-06-14 11:20:49,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 11:20:49,768 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 438 transitions, 7414 flow [2024-06-14 11:20:49,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:49,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:49,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:20:49,768 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:49,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash -430016241, now seen corresponding path program 10 times [2024-06-14 11:20:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501619210] [2024-06-14 11:20:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:49,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:49,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501619210] [2024-06-14 11:20:49,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501619210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:49,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:49,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:20:49,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445638151] [2024-06-14 11:20:49,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:49,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:20:49,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:20:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:20:49,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:49,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 438 transitions, 7414 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:49,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:49,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:49,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:51,030 INFO L124 PetriNetUnfolderBase]: 3731/6299 cut-off events. [2024-06-14 11:20:51,030 INFO L125 PetriNetUnfolderBase]: For 679509/679509 co-relation queries the response was YES. [2024-06-14 11:20:51,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47543 conditions, 6299 events. 3731/6299 cut-off events. For 679509/679509 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43131 event pairs, 1022 based on Foata normal form. 1/6299 useless extension candidates. Maximal degree in co-relation 47394. Up to 5792 conditions per place. [2024-06-14 11:20:51,124 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 396 selfloop transitions, 53 changer transitions 0/455 dead transitions. [2024-06-14 11:20:51,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 455 transitions, 8528 flow [2024-06-14 11:20:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:20:51,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 11:20:51,125 INFO L175 Difference]: Start difference. First operand has 316 places, 438 transitions, 7414 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:20:51,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 455 transitions, 8528 flow [2024-06-14 11:20:52,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 455 transitions, 8010 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:52,901 INFO L231 Difference]: Finished difference. Result has 318 places, 438 transitions, 7008 flow [2024-06-14 11:20:52,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7008, PETRI_PLACES=318, PETRI_TRANSITIONS=438} [2024-06-14 11:20:52,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 11:20:52,902 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 438 transitions, 7008 flow [2024-06-14 11:20:52,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:20:52,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:52,902 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] [2024-06-14 11:20:52,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:20:52,903 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:52,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:52,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1503271637, now seen corresponding path program 8 times [2024-06-14 11:20:52,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:52,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840361913] [2024-06-14 11:20:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:52,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:52,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840361913] [2024-06-14 11:20:52,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840361913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:52,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:52,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:52,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330171497] [2024-06-14 11:20:52,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:52,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:52,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:53,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:53,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 438 transitions, 7008 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) [2024-06-14 11:20:53,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:53,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:53,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:54,179 INFO L124 PetriNetUnfolderBase]: 3733/6305 cut-off events. [2024-06-14 11:20:54,180 INFO L125 PetriNetUnfolderBase]: For 691381/691383 co-relation queries the response was YES. [2024-06-14 11:20:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47002 conditions, 6305 events. 3733/6305 cut-off events. For 691381/691383 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 43168 event pairs, 1031 based on Foata normal form. 4/6308 useless extension candidates. Maximal degree in co-relation 46852. Up to 5571 conditions per place. [2024-06-14 11:20:54,254 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 361 selfloop transitions, 97 changer transitions 0/464 dead transitions. [2024-06-14 11:20:54,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 464 transitions, 8232 flow [2024-06-14 11:20:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:20:54,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 11:20:54,257 INFO L175 Difference]: Start difference. First operand has 318 places, 438 transitions, 7008 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:20:54,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 464 transitions, 8232 flow [2024-06-14 11:20:56,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 464 transitions, 8102 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:56,476 INFO L231 Difference]: Finished difference. Result has 316 places, 441 transitions, 7160 flow [2024-06-14 11:20:56,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6878, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7160, PETRI_PLACES=316, PETRI_TRANSITIONS=441} [2024-06-14 11:20:56,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 11:20:56,476 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 441 transitions, 7160 flow [2024-06-14 11:20:56,476 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) [2024-06-14 11:20:56,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:56,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:20:56,477 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:20:56,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:56,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1352643855, now seen corresponding path program 9 times [2024-06-14 11:20:56,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:56,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304606351] [2024-06-14 11:20:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:56,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:56,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304606351] [2024-06-14 11:20:56,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304606351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:56,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:56,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:20:56,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598579220] [2024-06-14 11:20:56,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:56,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:20:56,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:56,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:20:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:20:56,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:56,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 441 transitions, 7160 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) [2024-06-14 11:20:56,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:56,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:56,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:57,688 INFO L124 PetriNetUnfolderBase]: 3727/6297 cut-off events. [2024-06-14 11:20:57,688 INFO L125 PetriNetUnfolderBase]: For 699298/699300 co-relation queries the response was YES. [2024-06-14 11:20:57,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47102 conditions, 6297 events. 3727/6297 cut-off events. For 699298/699300 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43117 event pairs, 1031 based on Foata normal form. 4/6300 useless extension candidates. Maximal degree in co-relation 46951. Up to 5565 conditions per place. [2024-06-14 11:20:57,780 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 362 selfloop transitions, 98 changer transitions 0/466 dead transitions. [2024-06-14 11:20:57,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 466 transitions, 8144 flow [2024-06-14 11:20:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:20:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:20:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 11:20:57,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-14 11:20:57,781 INFO L175 Difference]: Start difference. First operand has 316 places, 441 transitions, 7160 flow. Second operand 6 states and 155 transitions. [2024-06-14 11:20:57,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 466 transitions, 8144 flow [2024-06-14 11:21:00,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 466 transitions, 7934 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:21:00,417 INFO L231 Difference]: Finished difference. Result has 317 places, 441 transitions, 7160 flow [2024-06-14 11:21:00,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7160, PETRI_PLACES=317, PETRI_TRANSITIONS=441} [2024-06-14 11:21:00,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-14 11:21:00,418 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 441 transitions, 7160 flow [2024-06-14 11:21:00,418 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) [2024-06-14 11:21:00,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:00,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:00,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:21:00,418 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:21:00,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1352632323, now seen corresponding path program 11 times [2024-06-14 11:21:00,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:00,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822594795] [2024-06-14 11:21:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:00,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:00,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822594795] [2024-06-14 11:21:00,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822594795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:00,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:00,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:00,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229868434] [2024-06-14 11:21:00,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:00,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:00,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:00,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:00,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:00,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 441 transitions, 7160 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:00,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:00,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:00,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:01,654 INFO L124 PetriNetUnfolderBase]: 3724/6292 cut-off events. [2024-06-14 11:21:01,654 INFO L125 PetriNetUnfolderBase]: For 690502/690502 co-relation queries the response was YES. [2024-06-14 11:21:01,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46988 conditions, 6292 events. 3724/6292 cut-off events. For 690502/690502 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43057 event pairs, 1022 based on Foata normal form. 1/6292 useless extension candidates. Maximal degree in co-relation 46837. Up to 5784 conditions per place. [2024-06-14 11:21:01,741 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-14 11:21:01,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 457 transitions, 8100 flow [2024-06-14 11:21:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:21:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:21:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:21:01,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:21:01,742 INFO L175 Difference]: Start difference. First operand has 317 places, 441 transitions, 7160 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:21:01,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 457 transitions, 8100 flow [2024-06-14 11:21:03,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 457 transitions, 7784 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 11:21:03,977 INFO L231 Difference]: Finished difference. Result has 319 places, 441 transitions, 6956 flow [2024-06-14 11:21:03,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6956, PETRI_PLACES=319, PETRI_TRANSITIONS=441} [2024-06-14 11:21:03,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 11:21:03,977 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 441 transitions, 6956 flow [2024-06-14 11:21:03,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:03,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:03,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:03,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:21:03,978 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)] === [2024-06-14 11:21:03,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:03,978 INFO L85 PathProgramCache]: Analyzing trace with hash -729554913, now seen corresponding path program 12 times [2024-06-14 11:21:03,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:03,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346809602] [2024-06-14 11:21:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:03,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:04,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346809602] [2024-06-14 11:21:04,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346809602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:04,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:04,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:04,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718521333] [2024-06-14 11:21:04,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:04,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:04,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:04,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 441 transitions, 6956 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:04,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:04,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:04,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:05,207 INFO L124 PetriNetUnfolderBase]: 3721/6288 cut-off events. [2024-06-14 11:21:05,207 INFO L125 PetriNetUnfolderBase]: For 668916/668916 co-relation queries the response was YES. [2024-06-14 11:21:05,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46282 conditions, 6288 events. 3721/6288 cut-off events. For 668916/668916 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43074 event pairs, 1022 based on Foata normal form. 1/6288 useless extension candidates. Maximal degree in co-relation 46131. Up to 5439 conditions per place. [2024-06-14 11:21:05,289 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 158 changer transitions 0/471 dead transitions. [2024-06-14 11:21:05,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 471 transitions, 8316 flow [2024-06-14 11:21:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:21:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:21:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 11:21:05,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-14 11:21:05,290 INFO L175 Difference]: Start difference. First operand has 319 places, 441 transitions, 6956 flow. Second operand 9 states and 212 transitions. [2024-06-14 11:21:05,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 471 transitions, 8316 flow [2024-06-14 11:21:07,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 471 transitions, 8172 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 11:21:07,772 INFO L231 Difference]: Finished difference. Result has 320 places, 441 transitions, 7138 flow [2024-06-14 11:21:07,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6812, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7138, PETRI_PLACES=320, PETRI_TRANSITIONS=441} [2024-06-14 11:21:07,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 11:21:07,772 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 441 transitions, 7138 flow [2024-06-14 11:21:07,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:07,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:07,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:07,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:21:07,773 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)] === [2024-06-14 11:21:07,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:07,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1219417859, now seen corresponding path program 13 times [2024-06-14 11:21:07,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:07,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773175952] [2024-06-14 11:21:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:07,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:07,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:07,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773175952] [2024-06-14 11:21:07,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773175952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:07,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:07,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:07,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177811677] [2024-06-14 11:21:07,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:07,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:07,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 441 transitions, 7138 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:07,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:07,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:07,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:09,061 INFO L124 PetriNetUnfolderBase]: 3731/6307 cut-off events. [2024-06-14 11:21:09,062 INFO L125 PetriNetUnfolderBase]: For 689217/689219 co-relation queries the response was YES. [2024-06-14 11:21:09,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46990 conditions, 6307 events. 3731/6307 cut-off events. For 689217/689219 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 43247 event pairs, 1031 based on Foata normal form. 4/6310 useless extension candidates. Maximal degree in co-relation 46838. Up to 5449 conditions per place. [2024-06-14 11:21:09,150 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 145 changer transitions 0/471 dead transitions. [2024-06-14 11:21:09,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 471 transitions, 8585 flow [2024-06-14 11:21:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 11:21:09,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 11:21:09,151 INFO L175 Difference]: Start difference. First operand has 320 places, 441 transitions, 7138 flow. Second operand 8 states and 190 transitions. [2024-06-14 11:21:09,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 471 transitions, 8585 flow [2024-06-14 11:21:11,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 471 transitions, 8149 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-14 11:21:11,335 INFO L231 Difference]: Finished difference. Result has 318 places, 445 transitions, 7098 flow [2024-06-14 11:21:11,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7098, PETRI_PLACES=318, PETRI_TRANSITIONS=445} [2024-06-14 11:21:11,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 11:21:11,335 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 445 transitions, 7098 flow [2024-06-14 11:21:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:11,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:11,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:11,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:21:11,335 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)] === [2024-06-14 11:21:11,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash 721394463, now seen corresponding path program 14 times [2024-06-14 11:21:11,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:11,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848910428] [2024-06-14 11:21:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:11,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:11,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:11,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848910428] [2024-06-14 11:21:11,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848910428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:11,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:11,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:11,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867294453] [2024-06-14 11:21:11,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:11,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:11,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:11,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:11,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 445 transitions, 7098 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:11,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:11,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:11,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:12,650 INFO L124 PetriNetUnfolderBase]: 3736/6315 cut-off events. [2024-06-14 11:21:12,650 INFO L125 PetriNetUnfolderBase]: For 684854/684854 co-relation queries the response was YES. [2024-06-14 11:21:12,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46839 conditions, 6315 events. 3736/6315 cut-off events. For 684854/684854 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43278 event pairs, 1022 based on Foata normal form. 1/6315 useless extension candidates. Maximal degree in co-relation 46688. Up to 5453 conditions per place. [2024-06-14 11:21:12,730 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 160 changer transitions 0/478 dead transitions. [2024-06-14 11:21:12,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 478 transitions, 8547 flow [2024-06-14 11:21:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:21:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:21:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 11:21:12,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 11:21:12,731 INFO L175 Difference]: Start difference. First operand has 318 places, 445 transitions, 7098 flow. Second operand 9 states and 211 transitions. [2024-06-14 11:21:12,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 478 transitions, 8547 flow [2024-06-14 11:21:14,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 478 transitions, 8217 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:21:14,971 INFO L231 Difference]: Finished difference. Result has 321 places, 448 transitions, 7169 flow [2024-06-14 11:21:14,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7169, PETRI_PLACES=321, PETRI_TRANSITIONS=448} [2024-06-14 11:21:14,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 11:21:14,972 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 448 transitions, 7169 flow [2024-06-14 11:21:14,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:14,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:14,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:14,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:21:14,972 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)] === [2024-06-14 11:21:14,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:14,972 INFO L85 PathProgramCache]: Analyzing trace with hash -379716015, now seen corresponding path program 15 times [2024-06-14 11:21:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:14,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101556110] [2024-06-14 11:21:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:15,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:15,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101556110] [2024-06-14 11:21:15,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101556110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:15,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:15,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:15,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718745928] [2024-06-14 11:21:15,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:15,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:15,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:15,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:15,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 448 transitions, 7169 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:16,236 INFO L124 PetriNetUnfolderBase]: 3738/6321 cut-off events. [2024-06-14 11:21:16,237 INFO L125 PetriNetUnfolderBase]: For 699311/699313 co-relation queries the response was YES. [2024-06-14 11:21:16,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46938 conditions, 6321 events. 3738/6321 cut-off events. For 699311/699313 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43306 event pairs, 1031 based on Foata normal form. 4/6324 useless extension candidates. Maximal degree in co-relation 46786. Up to 5457 conditions per place. [2024-06-14 11:21:16,323 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 144 changer transitions 0/476 dead transitions. [2024-06-14 11:21:16,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 476 transitions, 8786 flow [2024-06-14 11:21:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:21:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:21:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 11:21:16,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 11:21:16,324 INFO L175 Difference]: Start difference. First operand has 321 places, 448 transitions, 7169 flow. Second operand 9 states and 206 transitions. [2024-06-14 11:21:16,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 476 transitions, 8786 flow [2024-06-14 11:21:18,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 476 transitions, 8485 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 11:21:18,852 INFO L231 Difference]: Finished difference. Result has 323 places, 451 transitions, 7240 flow [2024-06-14 11:21:18,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6880, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7240, PETRI_PLACES=323, PETRI_TRANSITIONS=451} [2024-06-14 11:21:18,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-14 11:21:18,853 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 451 transitions, 7240 flow [2024-06-14 11:21:18,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:18,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:18,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:18,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:21:18,853 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)] === [2024-06-14 11:21:18,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:18,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1304359471, now seen corresponding path program 7 times [2024-06-14 11:21:18,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:18,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584411348] [2024-06-14 11:21:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:18,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584411348] [2024-06-14 11:21:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584411348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:18,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284024937] [2024-06-14 11:21:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:18,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:18,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:18,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:18,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 451 transitions, 7240 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:18,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:18,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:18,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:20,103 INFO L124 PetriNetUnfolderBase]: 3870/6537 cut-off events. [2024-06-14 11:21:20,103 INFO L125 PetriNetUnfolderBase]: For 872778/872780 co-relation queries the response was YES. [2024-06-14 11:21:20,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48136 conditions, 6537 events. 3870/6537 cut-off events. For 872778/872780 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45091 event pairs, 1075 based on Foata normal form. 44/6580 useless extension candidates. Maximal degree in co-relation 47984. Up to 5475 conditions per place. [2024-06-14 11:21:20,185 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 327 selfloop transitions, 146 changer transitions 3/482 dead transitions. [2024-06-14 11:21:20,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 482 transitions, 8720 flow [2024-06-14 11:21:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:21:20,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:21:20,186 INFO L175 Difference]: Start difference. First operand has 323 places, 451 transitions, 7240 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:21:20,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 482 transitions, 8720 flow [2024-06-14 11:21:22,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 482 transitions, 8332 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 11:21:22,749 INFO L231 Difference]: Finished difference. Result has 324 places, 452 transitions, 7218 flow [2024-06-14 11:21:22,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7218, PETRI_PLACES=324, PETRI_TRANSITIONS=452} [2024-06-14 11:21:22,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 11:21:22,750 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 452 transitions, 7218 flow [2024-06-14 11:21:22,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:22,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:22,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:22,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:21:22,751 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)] === [2024-06-14 11:21:22,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1315084231, now seen corresponding path program 8 times [2024-06-14 11:21:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:22,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062478584] [2024-06-14 11:21:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:22,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:22,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062478584] [2024-06-14 11:21:22,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062478584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:22,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:22,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736988234] [2024-06-14 11:21:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:22,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:22,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:22,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:22,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:22,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:22,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 452 transitions, 7218 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:22,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:22,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:22,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:24,135 INFO L124 PetriNetUnfolderBase]: 3966/6709 cut-off events. [2024-06-14 11:21:24,135 INFO L125 PetriNetUnfolderBase]: For 857707/857709 co-relation queries the response was YES. [2024-06-14 11:21:24,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48563 conditions, 6709 events. 3966/6709 cut-off events. For 857707/857709 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 46573 event pairs, 1121 based on Foata normal form. 44/6752 useless extension candidates. Maximal degree in co-relation 48410. Up to 5639 conditions per place. [2024-06-14 11:21:24,233 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 158 changer transitions 3/489 dead transitions. [2024-06-14 11:21:24,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 489 transitions, 8732 flow [2024-06-14 11:21:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 11:21:24,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-14 11:21:24,234 INFO L175 Difference]: Start difference. First operand has 324 places, 452 transitions, 7218 flow. Second operand 8 states and 199 transitions. [2024-06-14 11:21:24,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 489 transitions, 8732 flow [2024-06-14 11:21:26,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 489 transitions, 8390 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:21:26,871 INFO L231 Difference]: Finished difference. Result has 326 places, 453 transitions, 7267 flow [2024-06-14 11:21:26,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7267, PETRI_PLACES=326, PETRI_TRANSITIONS=453} [2024-06-14 11:21:26,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 11:21:26,871 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 453 transitions, 7267 flow [2024-06-14 11:21:26,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:26,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:26,872 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] [2024-06-14 11:21:26,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:21:26,872 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)] === [2024-06-14 11:21:26,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1223240531, now seen corresponding path program 9 times [2024-06-14 11:21:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80355627] [2024-06-14 11:21:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:26,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:26,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:26,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80355627] [2024-06-14 11:21:26,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80355627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:26,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:26,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:26,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181496495] [2024-06-14 11:21:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:26,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:26,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:27,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:27,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 453 transitions, 7267 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:27,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:27,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:27,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:28,293 INFO L124 PetriNetUnfolderBase]: 4125/6994 cut-off events. [2024-06-14 11:21:28,293 INFO L125 PetriNetUnfolderBase]: For 902217/902219 co-relation queries the response was YES. [2024-06-14 11:21:28,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50369 conditions, 6994 events. 4125/6994 cut-off events. For 902217/902219 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 48950 event pairs, 1018 based on Foata normal form. 38/7031 useless extension candidates. Maximal degree in co-relation 50215. Up to 5004 conditions per place. [2024-06-14 11:21:28,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 168 changer transitions 4/498 dead transitions. [2024-06-14 11:21:28,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 498 transitions, 8953 flow [2024-06-14 11:21:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 11:21:28,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 11:21:28,396 INFO L175 Difference]: Start difference. First operand has 326 places, 453 transitions, 7267 flow. Second operand 8 states and 208 transitions. [2024-06-14 11:21:28,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 498 transitions, 8953 flow [2024-06-14 11:21:31,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 498 transitions, 8587 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:21:31,371 INFO L231 Difference]: Finished difference. Result has 328 places, 452 transitions, 7214 flow [2024-06-14 11:21:31,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6901, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7214, PETRI_PLACES=328, PETRI_TRANSITIONS=452} [2024-06-14 11:21:31,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 11:21:31,372 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 452 transitions, 7214 flow [2024-06-14 11:21:31,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:31,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:31,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:31,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:21:31,372 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)] === [2024-06-14 11:21:31,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1712274905, now seen corresponding path program 2 times [2024-06-14 11:21:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:31,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559769718] [2024-06-14 11:21:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:31,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:31,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:31,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559769718] [2024-06-14 11:21:31,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559769718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:31,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:31,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:31,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121036250] [2024-06-14 11:21:31,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:31,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:31,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:31,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:31,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 452 transitions, 7214 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:31,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:31,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:31,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:32,852 INFO L124 PetriNetUnfolderBase]: 4390/7457 cut-off events. [2024-06-14 11:21:32,852 INFO L125 PetriNetUnfolderBase]: For 1041224/1041226 co-relation queries the response was YES. [2024-06-14 11:21:32,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54997 conditions, 7457 events. 4390/7457 cut-off events. For 1041224/1041226 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 53104 event pairs, 1060 based on Foata normal form. 44/7500 useless extension candidates. Maximal degree in co-relation 54842. Up to 5752 conditions per place. [2024-06-14 11:21:32,952 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 110 changer transitions 0/497 dead transitions. [2024-06-14 11:21:32,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 497 transitions, 8658 flow [2024-06-14 11:21:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:21:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:21:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 11:21:32,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-14 11:21:32,953 INFO L175 Difference]: Start difference. First operand has 328 places, 452 transitions, 7214 flow. Second operand 7 states and 185 transitions. [2024-06-14 11:21:32,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 497 transitions, 8658 flow [2024-06-14 11:21:35,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 497 transitions, 8216 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 11:21:35,451 INFO L231 Difference]: Finished difference. Result has 329 places, 458 transitions, 7181 flow [2024-06-14 11:21:35,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7181, PETRI_PLACES=329, PETRI_TRANSITIONS=458} [2024-06-14 11:21:35,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-14 11:21:35,452 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 458 transitions, 7181 flow [2024-06-14 11:21:35,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:35,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:35,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:21:35,452 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)] === [2024-06-14 11:21:35,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:35,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1211789627, now seen corresponding path program 3 times [2024-06-14 11:21:35,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:35,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389589221] [2024-06-14 11:21:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:35,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389589221] [2024-06-14 11:21:35,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389589221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:35,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:35,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:35,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100519577] [2024-06-14 11:21:35,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:35,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:35,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:35,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 458 transitions, 7181 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:35,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:35,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:35,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:37,198 INFO L124 PetriNetUnfolderBase]: 4505/7692 cut-off events. [2024-06-14 11:21:37,198 INFO L125 PetriNetUnfolderBase]: For 1001773/1001775 co-relation queries the response was YES. [2024-06-14 11:21:37,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56061 conditions, 7692 events. 4505/7692 cut-off events. For 1001773/1001775 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 55455 event pairs, 1309 based on Foata normal form. 38/7729 useless extension candidates. Maximal degree in co-relation 55904. Up to 5946 conditions per place. [2024-06-14 11:21:37,285 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 143 changer transitions 0/498 dead transitions. [2024-06-14 11:21:37,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 498 transitions, 8983 flow [2024-06-14 11:21:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 11:21:37,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-14 11:21:37,286 INFO L175 Difference]: Start difference. First operand has 329 places, 458 transitions, 7181 flow. Second operand 8 states and 197 transitions. [2024-06-14 11:21:37,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 498 transitions, 8983 flow [2024-06-14 11:21:41,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 498 transitions, 8781 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 11:21:41,250 INFO L231 Difference]: Finished difference. Result has 334 places, 462 transitions, 7430 flow [2024-06-14 11:21:41,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7430, PETRI_PLACES=334, PETRI_TRANSITIONS=462} [2024-06-14 11:21:41,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 11:21:41,251 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 462 transitions, 7430 flow [2024-06-14 11:21:41,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:41,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:41,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:41,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:21:41,251 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)] === [2024-06-14 11:21:41,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1269446105, now seen corresponding path program 4 times [2024-06-14 11:21:41,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:41,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776804988] [2024-06-14 11:21:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:41,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:41,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:41,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776804988] [2024-06-14 11:21:41,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776804988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:41,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:41,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:41,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474833926] [2024-06-14 11:21:41,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:41,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:41,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:41,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:41,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 462 transitions, 7430 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:41,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:41,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:41,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:42,950 INFO L124 PetriNetUnfolderBase]: 4954/8467 cut-off events. [2024-06-14 11:21:42,950 INFO L125 PetriNetUnfolderBase]: For 1265104/1265106 co-relation queries the response was YES. [2024-06-14 11:21:43,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64752 conditions, 8467 events. 4954/8467 cut-off events. For 1265104/1265106 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 61919 event pairs, 1199 based on Foata normal form. 44/8510 useless extension candidates. Maximal degree in co-relation 64593. Up to 4666 conditions per place. [2024-06-14 11:21:43,097 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 114 changer transitions 0/513 dead transitions. [2024-06-14 11:21:43,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 513 transitions, 9166 flow [2024-06-14 11:21:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:21:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:21:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 11:21:43,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-14 11:21:43,098 INFO L175 Difference]: Start difference. First operand has 334 places, 462 transitions, 7430 flow. Second operand 7 states and 188 transitions. [2024-06-14 11:21:43,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 513 transitions, 9166 flow [2024-06-14 11:21:47,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 513 transitions, 8922 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 11:21:47,433 INFO L231 Difference]: Finished difference. Result has 339 places, 469 transitions, 7669 flow [2024-06-14 11:21:47,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7669, PETRI_PLACES=339, PETRI_TRANSITIONS=469} [2024-06-14 11:21:47,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 11:21:47,434 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 469 transitions, 7669 flow [2024-06-14 11:21:47,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:47,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:47,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:47,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:21:47,434 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)] === [2024-06-14 11:21:47,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash -571703117, now seen corresponding path program 1 times [2024-06-14 11:21:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:47,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405857889] [2024-06-14 11:21:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:47,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:47,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405857889] [2024-06-14 11:21:47,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405857889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:47,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:47,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:47,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143832899] [2024-06-14 11:21:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:47,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:47,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:47,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:47,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:47,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 469 transitions, 7669 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:47,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:47,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:47,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:49,285 INFO L124 PetriNetUnfolderBase]: 5235/8945 cut-off events. [2024-06-14 11:21:49,285 INFO L125 PetriNetUnfolderBase]: For 1433218/1433226 co-relation queries the response was YES. [2024-06-14 11:21:49,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71037 conditions, 8945 events. 5235/8945 cut-off events. For 1433218/1433226 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 66951 event pairs, 1641 based on Foata normal form. 39/8979 useless extension candidates. Maximal degree in co-relation 70874. Up to 6372 conditions per place. [2024-06-14 11:21:49,423 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 213 selfloop transitions, 285 changer transitions 7/511 dead transitions. [2024-06-14 11:21:49,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9299 flow [2024-06-14 11:21:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 11:21:49,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-14 11:21:49,424 INFO L175 Difference]: Start difference. First operand has 339 places, 469 transitions, 7669 flow. Second operand 8 states and 201 transitions. [2024-06-14 11:21:49,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9299 flow [2024-06-14 11:21:54,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 511 transitions, 9105 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 11:21:54,666 INFO L231 Difference]: Finished difference. Result has 344 places, 471 transitions, 8109 flow [2024-06-14 11:21:54,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8109, PETRI_PLACES=344, PETRI_TRANSITIONS=471} [2024-06-14 11:21:54,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 11:21:54,667 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 471 transitions, 8109 flow [2024-06-14 11:21:54,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:54,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:54,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:54,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:21:54,667 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)] === [2024-06-14 11:21:54,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:54,668 INFO L85 PathProgramCache]: Analyzing trace with hash -861389911, now seen corresponding path program 2 times [2024-06-14 11:21:54,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:54,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875634385] [2024-06-14 11:21:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:54,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875634385] [2024-06-14 11:21:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875634385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:54,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:21:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77087315] [2024-06-14 11:21:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:21:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:54,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:21:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:21:54,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:54,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 471 transitions, 8109 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:21:54,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:54,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:54,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:56,998 INFO L124 PetriNetUnfolderBase]: 5317/9097 cut-off events. [2024-06-14 11:21:56,998 INFO L125 PetriNetUnfolderBase]: For 1463339/1463347 co-relation queries the response was YES. [2024-06-14 11:21:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71939 conditions, 9097 events. 5317/9097 cut-off events. For 1463339/1463347 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 68294 event pairs, 1932 based on Foata normal form. 45/9137 useless extension candidates. Maximal degree in co-relation 71775. Up to 7602 conditions per place. [2024-06-14 11:21:57,128 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 267 changer transitions 3/498 dead transitions. [2024-06-14 11:21:57,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 498 transitions, 9425 flow [2024-06-14 11:21:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 11:21:57,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 11:21:57,130 INFO L175 Difference]: Start difference. First operand has 344 places, 471 transitions, 8109 flow. Second operand 8 states and 190 transitions. [2024-06-14 11:21:57,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 498 transitions, 9425 flow [2024-06-14 11:22:02,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 498 transitions, 8668 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 11:22:02,417 INFO L231 Difference]: Finished difference. Result has 346 places, 472 transitions, 7947 flow [2024-06-14 11:22:02,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7947, PETRI_PLACES=346, PETRI_TRANSITIONS=472} [2024-06-14 11:22:02,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 11:22:02,418 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 472 transitions, 7947 flow [2024-06-14 11:22:02,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:02,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:02,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:02,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:22:02,418 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)] === [2024-06-14 11:22:02,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash -938596365, now seen corresponding path program 3 times [2024-06-14 11:22:02,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:02,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353318674] [2024-06-14 11:22:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:02,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:02,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:02,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353318674] [2024-06-14 11:22:02,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353318674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:02,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:02,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:22:02,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460576777] [2024-06-14 11:22:02,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:02,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:22:02,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:22:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:22:02,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:02,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 472 transitions, 7947 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:02,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:02,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:02,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:04,597 INFO L124 PetriNetUnfolderBase]: 5415/9264 cut-off events. [2024-06-14 11:22:04,598 INFO L125 PetriNetUnfolderBase]: For 1461917/1461925 co-relation queries the response was YES. [2024-06-14 11:22:04,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72067 conditions, 9264 events. 5415/9264 cut-off events. For 1461917/1461925 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 69838 event pairs, 1916 based on Foata normal form. 39/9298 useless extension candidates. Maximal degree in co-relation 71903. Up to 7558 conditions per place. [2024-06-14 11:22:04,724 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 270 changer transitions 6/505 dead transitions. [2024-06-14 11:22:04,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 505 transitions, 9301 flow [2024-06-14 11:22:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:22:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:22:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 11:22:04,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-14 11:22:04,725 INFO L175 Difference]: Start difference. First operand has 346 places, 472 transitions, 7947 flow. Second operand 8 states and 195 transitions. [2024-06-14 11:22:04,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 505 transitions, 9301 flow [2024-06-14 11:22:10,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 505 transitions, 8741 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:22:10,178 INFO L231 Difference]: Finished difference. Result has 348 places, 473 transitions, 7966 flow [2024-06-14 11:22:10,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7966, PETRI_PLACES=348, PETRI_TRANSITIONS=473} [2024-06-14 11:22:10,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 11:22:10,178 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 473 transitions, 7966 flow [2024-06-14 11:22:10,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:10,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:10,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:22:10,178 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)] === [2024-06-14 11:22:10,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:10,179 INFO L85 PathProgramCache]: Analyzing trace with hash -430007313, now seen corresponding path program 4 times [2024-06-14 11:22:10,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:10,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339970903] [2024-06-14 11:22:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:10,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:10,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:10,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339970903] [2024-06-14 11:22:10,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339970903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:10,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:10,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:22:10,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655688066] [2024-06-14 11:22:10,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:10,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:22:10,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:22:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:22:10,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:10,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 473 transitions, 7966 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:10,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:10,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:10,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:12,421 INFO L124 PetriNetUnfolderBase]: 5441/9333 cut-off events. [2024-06-14 11:22:12,421 INFO L125 PetriNetUnfolderBase]: For 1397073/1397073 co-relation queries the response was YES. [2024-06-14 11:22:12,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72696 conditions, 9333 events. 5441/9333 cut-off events. For 1397073/1397073 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 70558 event pairs, 1903 based on Foata normal form. 16/9348 useless extension candidates. Maximal degree in co-relation 72531. Up to 8551 conditions per place. [2024-06-14 11:22:12,540 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 55 changer transitions 0/495 dead transitions. [2024-06-14 11:22:12,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 495 transitions, 9060 flow [2024-06-14 11:22:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:22:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:22:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 11:22:12,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 11:22:12,541 INFO L175 Difference]: Start difference. First operand has 348 places, 473 transitions, 7966 flow. Second operand 9 states and 192 transitions. [2024-06-14 11:22:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 495 transitions, 9060 flow [2024-06-14 11:22:18,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 495 transitions, 8489 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 11:22:18,532 INFO L231 Difference]: Finished difference. Result has 351 places, 475 transitions, 7569 flow [2024-06-14 11:22:18,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7395, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7569, PETRI_PLACES=351, PETRI_TRANSITIONS=475} [2024-06-14 11:22:18,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-14 11:22:18,533 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 475 transitions, 7569 flow [2024-06-14 11:22:18,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:18,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:18,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:18,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:22:18,534 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)] === [2024-06-14 11:22:18,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash -430155183, now seen corresponding path program 5 times [2024-06-14 11:22:18,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:18,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433064382] [2024-06-14 11:22:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:18,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:18,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:18,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433064382] [2024-06-14 11:22:18,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433064382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:18,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:18,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:22:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417354058] [2024-06-14 11:22:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:18,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:22:18,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:22:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:22:18,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:18,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 475 transitions, 7569 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:18,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:18,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:18,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:20,773 INFO L124 PetriNetUnfolderBase]: 5527/9471 cut-off events. [2024-06-14 11:22:20,773 INFO L125 PetriNetUnfolderBase]: For 1446937/1446937 co-relation queries the response was YES. [2024-06-14 11:22:20,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73951 conditions, 9471 events. 5527/9471 cut-off events. For 1446937/1446937 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 71655 event pairs, 1899 based on Foata normal form. 12/9482 useless extension candidates. Maximal degree in co-relation 73785. Up to 8511 conditions per place. [2024-06-14 11:22:20,900 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 62 changer transitions 0/502 dead transitions. [2024-06-14 11:22:20,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 502 transitions, 8927 flow [2024-06-14 11:22:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:22:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:22:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:22:20,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:22:20,901 INFO L175 Difference]: Start difference. First operand has 351 places, 475 transitions, 7569 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:22:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 502 transitions, 8927 flow [2024-06-14 11:22:27,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 502 transitions, 8783 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 11:22:27,229 INFO L231 Difference]: Finished difference. Result has 353 places, 478 transitions, 7648 flow [2024-06-14 11:22:27,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7425, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7648, PETRI_PLACES=353, PETRI_TRANSITIONS=478} [2024-06-14 11:22:27,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 11:22:27,229 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 478 transitions, 7648 flow [2024-06-14 11:22:27,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:27,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:27,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:27,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:22:27,229 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)] === [2024-06-14 11:22:27,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1489917395, now seen corresponding path program 1 times [2024-06-14 11:22:27,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:27,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841304284] [2024-06-14 11:22:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:27,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:27,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:27,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841304284] [2024-06-14 11:22:27,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841304284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:27,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:27,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:22:27,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079439213] [2024-06-14 11:22:27,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:27,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:22:27,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:22:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:22:27,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:27,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 478 transitions, 7648 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:27,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:27,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:27,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:29,613 INFO L124 PetriNetUnfolderBase]: 5692/9692 cut-off events. [2024-06-14 11:22:29,613 INFO L125 PetriNetUnfolderBase]: For 1574825/1574825 co-relation queries the response was YES. [2024-06-14 11:22:29,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77955 conditions, 9692 events. 5692/9692 cut-off events. For 1574825/1574825 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 73118 event pairs, 1929 based on Foata normal form. 12/9703 useless extension candidates. Maximal degree in co-relation 77788. Up to 8757 conditions per place. [2024-06-14 11:22:29,745 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 39 changer transitions 0/508 dead transitions. [2024-06-14 11:22:29,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 508 transitions, 9081 flow [2024-06-14 11:22:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:22:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:22:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 11:22:29,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 11:22:29,746 INFO L175 Difference]: Start difference. First operand has 353 places, 478 transitions, 7648 flow. Second operand 9 states and 192 transitions. [2024-06-14 11:22:29,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 508 transitions, 9081 flow [2024-06-14 11:22:35,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 508 transitions, 8973 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:22:35,488 INFO L231 Difference]: Finished difference. Result has 358 places, 484 transitions, 7804 flow [2024-06-14 11:22:35,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7540, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7804, PETRI_PLACES=358, PETRI_TRANSITIONS=484} [2024-06-14 11:22:35,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 11:22:35,488 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 484 transitions, 7804 flow [2024-06-14 11:22:35,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:35,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:35,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:35,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:22:35,489 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)] === [2024-06-14 11:22:35,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash -15537327, now seen corresponding path program 6 times [2024-06-14 11:22:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768886323] [2024-06-14 11:22:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768886323] [2024-06-14 11:22:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768886323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:35,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:35,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:22:35,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456961227] [2024-06-14 11:22:35,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:22:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:22:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:22:35,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:35,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 484 transitions, 7804 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:35,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:35,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:35,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:37,970 INFO L124 PetriNetUnfolderBase]: 5811/9937 cut-off events. [2024-06-14 11:22:37,971 INFO L125 PetriNetUnfolderBase]: For 1746175/1746175 co-relation queries the response was YES. [2024-06-14 11:22:38,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79345 conditions, 9937 events. 5811/9937 cut-off events. For 1746175/1746175 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 75677 event pairs, 2031 based on Foata normal form. 42/9978 useless extension candidates. Maximal degree in co-relation 79175. Up to 8592 conditions per place. [2024-06-14 11:22:38,119 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 167 changer transitions 3/521 dead transitions. [2024-06-14 11:22:38,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 521 transitions, 9202 flow [2024-06-14 11:22:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:22:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:22:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 11:22:38,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:22:38,120 INFO L175 Difference]: Start difference. First operand has 358 places, 484 transitions, 7804 flow. Second operand 9 states and 216 transitions. [2024-06-14 11:22:38,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 521 transitions, 9202 flow [2024-06-14 11:22:44,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 521 transitions, 9089 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:22:44,006 INFO L231 Difference]: Finished difference. Result has 362 places, 485 transitions, 8085 flow [2024-06-14 11:22:44,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8085, PETRI_PLACES=362, PETRI_TRANSITIONS=485} [2024-06-14 11:22:44,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-14 11:22:44,006 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 485 transitions, 8085 flow [2024-06-14 11:22:44,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:44,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:44,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:44,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:22:44,007 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)] === [2024-06-14 11:22:44,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash -15685197, now seen corresponding path program 7 times [2024-06-14 11:22:44,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:44,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050783927] [2024-06-14 11:22:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:44,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:44,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050783927] [2024-06-14 11:22:44,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050783927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:44,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:44,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:22:44,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142591682] [2024-06-14 11:22:44,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:44,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:22:44,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:44,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:22:44,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:22:44,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:44,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 485 transitions, 8085 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:44,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:44,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:44,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:46,395 INFO L124 PetriNetUnfolderBase]: 6049/10349 cut-off events. [2024-06-14 11:22:46,395 INFO L125 PetriNetUnfolderBase]: For 1900622/1900622 co-relation queries the response was YES. [2024-06-14 11:22:46,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84351 conditions, 10349 events. 6049/10349 cut-off events. For 1900622/1900622 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 79534 event pairs, 1893 based on Foata normal form. 36/10384 useless extension candidates. Maximal degree in co-relation 84180. Up to 8039 conditions per place. [2024-06-14 11:22:46,530 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 183 changer transitions 4/532 dead transitions. [2024-06-14 11:22:46,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 532 transitions, 9763 flow [2024-06-14 11:22:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:22:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:22:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 11:22:46,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:22:46,531 INFO L175 Difference]: Start difference. First operand has 362 places, 485 transitions, 8085 flow. Second operand 9 states and 225 transitions. [2024-06-14 11:22:46,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 532 transitions, 9763 flow [2024-06-14 11:22:54,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 532 transitions, 9471 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:22:54,571 INFO L231 Difference]: Finished difference. Result has 365 places, 486 transitions, 8206 flow [2024-06-14 11:22:54,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7793, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8206, PETRI_PLACES=365, PETRI_TRANSITIONS=486} [2024-06-14 11:22:54,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 11:22:54,572 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 486 transitions, 8206 flow [2024-06-14 11:22:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:54,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:54,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:54,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:22:54,572 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)] === [2024-06-14 11:22:54,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1534958687, now seen corresponding path program 2 times [2024-06-14 11:22:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081103700] [2024-06-14 11:22:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:54,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:54,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:54,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081103700] [2024-06-14 11:22:54,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081103700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:54,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:54,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:22:54,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739174894] [2024-06-14 11:22:54,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:54,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:22:54,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:22:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:22:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:54,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 486 transitions, 8206 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:22:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:57,209 INFO L124 PetriNetUnfolderBase]: 6301/10769 cut-off events. [2024-06-14 11:22:57,210 INFO L125 PetriNetUnfolderBase]: For 2070898/2070898 co-relation queries the response was YES. [2024-06-14 11:22:57,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89385 conditions, 10769 events. 6301/10769 cut-off events. For 2070898/2070898 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 83389 event pairs, 1888 based on Foata normal form. 42/10806 useless extension candidates. Maximal degree in co-relation 89213. Up to 8516 conditions per place. [2024-06-14 11:22:57,377 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 128 changer transitions 0/537 dead transitions. [2024-06-14 11:22:57,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 537 transitions, 9812 flow [2024-06-14 11:22:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:22:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:22:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 11:22:57,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-14 11:22:57,377 INFO L175 Difference]: Start difference. First operand has 365 places, 486 transitions, 8206 flow. Second operand 8 states and 207 transitions. [2024-06-14 11:22:57,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 537 transitions, 9812 flow [2024-06-14 11:23:05,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 537 transitions, 9451 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 11:23:05,723 INFO L231 Difference]: Finished difference. Result has 368 places, 494 transitions, 8379 flow [2024-06-14 11:23:05,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7851, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8379, PETRI_PLACES=368, PETRI_TRANSITIONS=494} [2024-06-14 11:23:05,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 11:23:05,723 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 494 transitions, 8379 flow [2024-06-14 11:23:05,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:05,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:05,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:05,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:23:05,724 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)] === [2024-06-14 11:23:05,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:05,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1269261407, now seen corresponding path program 3 times [2024-06-14 11:23:05,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:05,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969429027] [2024-06-14 11:23:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:05,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:05,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:05,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969429027] [2024-06-14 11:23:05,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969429027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:05,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:05,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:23:05,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150615859] [2024-06-14 11:23:05,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:05,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:23:05,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:05,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:23:05,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:23:05,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:05,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 494 transitions, 8379 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:05,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:05,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:05,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:08,458 INFO L124 PetriNetUnfolderBase]: 6399/10990 cut-off events. [2024-06-14 11:23:08,458 INFO L125 PetriNetUnfolderBase]: For 1997998/1998000 co-relation queries the response was YES. [2024-06-14 11:23:08,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89387 conditions, 10990 events. 6399/10990 cut-off events. For 1997998/1998000 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 85253 event pairs, 1817 based on Foata normal form. 44/11033 useless extension candidates. Maximal degree in co-relation 89213. Up to 6224 conditions per place. [2024-06-14 11:23:08,626 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 419 selfloop transitions, 114 changer transitions 0/539 dead transitions. [2024-06-14 11:23:08,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 539 transitions, 10075 flow [2024-06-14 11:23:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 11:23:08,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6550522648083623 [2024-06-14 11:23:08,627 INFO L175 Difference]: Start difference. First operand has 368 places, 494 transitions, 8379 flow. Second operand 7 states and 188 transitions. [2024-06-14 11:23:08,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 539 transitions, 10075 flow [2024-06-14 11:23:17,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 539 transitions, 9799 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 11:23:17,150 INFO L231 Difference]: Finished difference. Result has 369 places, 496 transitions, 8409 flow [2024-06-14 11:23:17,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8409, PETRI_PLACES=369, PETRI_TRANSITIONS=496} [2024-06-14 11:23:17,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 11:23:17,150 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 496 transitions, 8409 flow [2024-06-14 11:23:17,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:17,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:17,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:17,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:23:17,151 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)] === [2024-06-14 11:23:17,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1530992112, now seen corresponding path program 1 times [2024-06-14 11:23:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:17,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578173588] [2024-06-14 11:23:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:17,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578173588] [2024-06-14 11:23:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578173588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:17,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:17,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:23:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859668700] [2024-06-14 11:23:17,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:23:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:23:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:23:17,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:17,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 496 transitions, 8409 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:17,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:17,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:17,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:19,715 INFO L124 PetriNetUnfolderBase]: 6466/11065 cut-off events. [2024-06-14 11:23:19,715 INFO L125 PetriNetUnfolderBase]: For 1822724/1822724 co-relation queries the response was YES. [2024-06-14 11:23:19,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90298 conditions, 11065 events. 6466/11065 cut-off events. For 1822724/1822724 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 86104 event pairs, 2135 based on Foata normal form. 2/11059 useless extension candidates. Maximal degree in co-relation 90124. Up to 9435 conditions per place. [2024-06-14 11:23:20,006 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 406 selfloop transitions, 125 changer transitions 0/537 dead transitions. [2024-06-14 11:23:20,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 537 transitions, 10210 flow [2024-06-14 11:23:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:23:20,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 11:23:20,007 INFO L175 Difference]: Start difference. First operand has 369 places, 496 transitions, 8409 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:23:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 537 transitions, 10210 flow [2024-06-14 11:23:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 537 transitions, 9940 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 11:23:26,964 INFO L231 Difference]: Finished difference. Result has 373 places, 504 transitions, 8631 flow [2024-06-14 11:23:26,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8151, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8631, PETRI_PLACES=373, PETRI_TRANSITIONS=504} [2024-06-14 11:23:26,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 11:23:26,965 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 504 transitions, 8631 flow [2024-06-14 11:23:26,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:26,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:26,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:26,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:23:26,966 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)] === [2024-06-14 11:23:26,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1956002796, now seen corresponding path program 2 times [2024-06-14 11:23:26,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:26,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054101171] [2024-06-14 11:23:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:26,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054101171] [2024-06-14 11:23:27,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054101171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:27,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:27,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:23:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046669742] [2024-06-14 11:23:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:23:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:23:27,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:23:27,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:27,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 504 transitions, 8631 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:27,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:27,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:27,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:29,715 INFO L124 PetriNetUnfolderBase]: 6533/11170 cut-off events. [2024-06-14 11:23:29,715 INFO L125 PetriNetUnfolderBase]: For 1872080/1872080 co-relation queries the response was YES. [2024-06-14 11:23:29,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91586 conditions, 11170 events. 6533/11170 cut-off events. For 1872080/1872080 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 86884 event pairs, 2126 based on Foata normal form. 2/11164 useless extension candidates. Maximal degree in co-relation 91411. Up to 9479 conditions per place. [2024-06-14 11:23:29,860 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 406 selfloop transitions, 129 changer transitions 1/542 dead transitions. [2024-06-14 11:23:29,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 542 transitions, 10408 flow [2024-06-14 11:23:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:23:29,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 11:23:29,861 INFO L175 Difference]: Start difference. First operand has 373 places, 504 transitions, 8631 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:23:29,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 542 transitions, 10408 flow [2024-06-14 11:23:37,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 542 transitions, 10197 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 11:23:37,656 INFO L231 Difference]: Finished difference. Result has 378 places, 508 transitions, 8775 flow [2024-06-14 11:23:37,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8775, PETRI_PLACES=378, PETRI_TRANSITIONS=508} [2024-06-14 11:23:37,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 11:23:37,656 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 508 transitions, 8775 flow [2024-06-14 11:23:37,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:37,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:37,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:37,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:23:37,657 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)] === [2024-06-14 11:23:37,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:37,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1903624266, now seen corresponding path program 3 times [2024-06-14 11:23:37,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:37,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530803086] [2024-06-14 11:23:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:37,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:37,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530803086] [2024-06-14 11:23:37,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530803086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:37,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:37,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:23:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139894912] [2024-06-14 11:23:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:37,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:23:37,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:23:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:23:37,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:37,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 508 transitions, 8775 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:37,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:37,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:37,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:40,215 INFO L124 PetriNetUnfolderBase]: 6528/11188 cut-off events. [2024-06-14 11:23:40,215 INFO L125 PetriNetUnfolderBase]: For 1900337/1900337 co-relation queries the response was YES. [2024-06-14 11:23:40,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92089 conditions, 11188 events. 6528/11188 cut-off events. For 1900337/1900337 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 87607 event pairs, 2444 based on Foata normal form. 2/11177 useless extension candidates. Maximal degree in co-relation 91912. Up to 10095 conditions per place. [2024-06-14 11:23:40,378 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 416 selfloop transitions, 115 changer transitions 0/537 dead transitions. [2024-06-14 11:23:40,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 10155 flow [2024-06-14 11:23:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:23:40,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 11:23:40,379 INFO L175 Difference]: Start difference. First operand has 378 places, 508 transitions, 8775 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:23:40,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 10155 flow [2024-06-14 11:23:49,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 537 transitions, 9928 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:23:49,171 INFO L231 Difference]: Finished difference. Result has 383 places, 511 transitions, 8849 flow [2024-06-14 11:23:49,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8553, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8849, PETRI_PLACES=383, PETRI_TRANSITIONS=511} [2024-06-14 11:23:49,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-14 11:23:49,172 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 511 transitions, 8849 flow [2024-06-14 11:23:49,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:49,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:49,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:49,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:23:49,173 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)] === [2024-06-14 11:23:49,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash 123922154, now seen corresponding path program 4 times [2024-06-14 11:23:49,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:49,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66680349] [2024-06-14 11:23:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:49,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:49,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66680349] [2024-06-14 11:23:49,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66680349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:49,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:49,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:23:49,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775179891] [2024-06-14 11:23:49,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:49,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:23:49,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:49,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:23:49,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:23:49,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:49,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 511 transitions, 8849 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:23:49,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:49,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:49,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:51,867 INFO L124 PetriNetUnfolderBase]: 6536/11208 cut-off events. [2024-06-14 11:23:51,867 INFO L125 PetriNetUnfolderBase]: For 1936451/1936451 co-relation queries the response was YES. [2024-06-14 11:23:51,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92453 conditions, 11208 events. 6536/11208 cut-off events. For 1936451/1936451 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 87782 event pairs, 2454 based on Foata normal form. 2/11205 useless extension candidates. Maximal degree in co-relation 92274. Up to 10147 conditions per place. [2024-06-14 11:23:52,027 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 418 selfloop transitions, 110 changer transitions 0/534 dead transitions. [2024-06-14 11:23:52,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 534 transitions, 10007 flow [2024-06-14 11:23:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:23:52,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:23:52,028 INFO L175 Difference]: Start difference. First operand has 383 places, 511 transitions, 8849 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:23:52,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 534 transitions, 10007 flow [2024-06-14 11:24:00,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 534 transitions, 9716 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 11:24:00,167 INFO L231 Difference]: Finished difference. Result has 386 places, 513 transitions, 8837 flow [2024-06-14 11:24:00,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8837, PETRI_PLACES=386, PETRI_TRANSITIONS=513} [2024-06-14 11:24:00,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-14 11:24:00,168 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 513 transitions, 8837 flow [2024-06-14 11:24:00,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:24:00,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:00,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:00,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:24:00,168 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)] === [2024-06-14 11:24:00,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:00,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1948777536, now seen corresponding path program 5 times [2024-06-14 11:24:00,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:00,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405234556] [2024-06-14 11:24:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:00,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:00,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:00,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405234556] [2024-06-14 11:24:00,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405234556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:00,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:00,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:24:00,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487601979] [2024-06-14 11:24:00,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:00,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:24:00,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:00,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:24:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:24:00,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:00,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 513 transitions, 8837 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:24:00,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:00,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:00,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:02,917 INFO L124 PetriNetUnfolderBase]: 6577/11245 cut-off events. [2024-06-14 11:24:02,917 INFO L125 PetriNetUnfolderBase]: For 2002904/2002904 co-relation queries the response was YES. [2024-06-14 11:24:03,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93656 conditions, 11245 events. 6577/11245 cut-off events. For 2002904/2002904 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 87870 event pairs, 2449 based on Foata normal form. 2/11230 useless extension candidates. Maximal degree in co-relation 93476. Up to 10073 conditions per place. [2024-06-14 11:24:03,198 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 418 selfloop transitions, 113 changer transitions 1/538 dead transitions. [2024-06-14 11:24:03,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 538 transitions, 10235 flow [2024-06-14 11:24:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:24:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:24:03,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:24:03,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 11:24:03,200 INFO L175 Difference]: Start difference. First operand has 386 places, 513 transitions, 8837 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:24:03,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 538 transitions, 10235 flow [2024-06-14 11:24:10,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 538 transitions, 10004 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 11:24:10,740 INFO L231 Difference]: Finished difference. Result has 389 places, 514 transitions, 8874 flow [2024-06-14 11:24:10,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8874, PETRI_PLACES=389, PETRI_TRANSITIONS=514} [2024-06-14 11:24:10,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 11:24:10,741 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 514 transitions, 8874 flow [2024-06-14 11:24:10,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:24:10,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:10,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:10,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:24:10,742 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)] === [2024-06-14 11:24:10,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1988502548, now seen corresponding path program 6 times [2024-06-14 11:24:10,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:10,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316685787] [2024-06-14 11:24:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:10,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:10,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316685787] [2024-06-14 11:24:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316685787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:10,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:10,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:24:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429978171] [2024-06-14 11:24:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:10,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:24:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:24:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:24:10,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:10,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 514 transitions, 8874 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:24:10,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:10,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:10,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:13,536 INFO L124 PetriNetUnfolderBase]: 6572/11268 cut-off events. [2024-06-14 11:24:13,536 INFO L125 PetriNetUnfolderBase]: For 2028524/2028524 co-relation queries the response was YES. [2024-06-14 11:24:13,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93966 conditions, 11268 events. 6572/11268 cut-off events. For 2028524/2028524 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 88231 event pairs, 2478 based on Foata normal form. 2/11265 useless extension candidates. Maximal degree in co-relation 93784. Up to 10203 conditions per place. [2024-06-14 11:24:13,705 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 420 selfloop transitions, 106 changer transitions 0/532 dead transitions. [2024-06-14 11:24:13,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 532 transitions, 9970 flow [2024-06-14 11:24:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:24:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:24:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:24:13,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:24:13,706 INFO L175 Difference]: Start difference. First operand has 389 places, 514 transitions, 8874 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:24:13,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 532 transitions, 9970 flow [2024-06-14 11:24:21,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 532 transitions, 9744 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:24:21,291 INFO L231 Difference]: Finished difference. Result has 392 places, 514 transitions, 8865 flow [2024-06-14 11:24:21,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8648, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8865, PETRI_PLACES=392, PETRI_TRANSITIONS=514} [2024-06-14 11:24:21,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-14 11:24:21,291 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 514 transitions, 8865 flow [2024-06-14 11:24:21,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:24:21,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:21,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:21,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:24:21,292 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)] === [2024-06-14 11:24:21,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash -504442930, now seen corresponding path program 1 times [2024-06-14 11:24:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:21,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008561038] [2024-06-14 11:24:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:21,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:21,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008561038] [2024-06-14 11:24:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008561038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:21,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:21,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:24:21,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226039379] [2024-06-14 11:24:21,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:24:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:24:21,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:24:21,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:21,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 514 transitions, 8865 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:24:21,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:21,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:21,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand