./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:50:25,724 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:50:25,792 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:50:25,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:50:25,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:50:25,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:50:25,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:50:25,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:50:25,827 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:50:25,830 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:50:25,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:50:25,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:50:25,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:50:25,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:50:25,833 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:50:25,833 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:50:25,833 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:50:25,833 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:50:25,833 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:50:25,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:50:25,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:50:25,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:50:25,835 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:50:25,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:50:25,835 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:50:25,836 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:50:25,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:50:25,836 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:50:25,836 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:50:25,837 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:50:25,837 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:50:25,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:50:25,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:50:25,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:50:25,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:50:25,838 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:50:25,838 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:50:25,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:50:25,839 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:50:25,839 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:50:25,839 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:50:25,840 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:50:25,840 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:50:25,840 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:50:26,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:50:26,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:50:26,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:50:26,095 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:50:26,095 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:50:26,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:50:27,134 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:50:27,340 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:50:27,341 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:50:27,355 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667f33153/b99abd360ddd47ba89a477b45cbabc48/FLAG93df32440 [2024-06-27 17:50:27,366 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667f33153/b99abd360ddd47ba89a477b45cbabc48 [2024-06-27 17:50:27,369 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:50:27,369 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:50:27,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 17:50:27,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:50:27,472 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:50:27,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:50:27,473 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:50:27,476 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:50:27,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:50:27" (1/2) ... [2024-06-27 17:50:27,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2541e613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:27, skipping insertion in model container [2024-06-27 17:50:27,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:50:27" (1/2) ... [2024-06-27 17:50:27,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7cb83df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:50:27, skipping insertion in model container [2024-06-27 17:50:27,481 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:27" (2/2) ... [2024-06-27 17:50:27,481 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2541e613 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27, skipping insertion in model container [2024-06-27 17:50:27,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:27" (2/2) ... [2024-06-27 17:50:27,481 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:50:27,514 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:50:27,515 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:50:27,515 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:50:27,515 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:50:27,515 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:50:27,515 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-27 17:50:27,552 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:50:27,702 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:50:27,846 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:50:27,854 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:50:27,885 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:50:27,937 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:50:27,970 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:50:27,970 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27 WrapperNode [2024-06-27 17:50:27,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:50:27,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:50:27,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:50:27,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:50:27,977 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 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,004 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 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,028 INFO L138 Inliner]: procedures = 175, calls = 39, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-06-27 17:50:28,028 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:50:28,029 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:50:28,029 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:50:28,029 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:50:28,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,059 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 17:50:28,060 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:50:28,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:50:28,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:50:28,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:50:28,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (1/1) ... [2024-06-27 17:50:28,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:50:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:50:28,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:50:28,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:50:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:50:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:50:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:50:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:50:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:50:28,130 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:50:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:50:28,131 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:50:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:50:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:50:28,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:50:28,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:50:28,132 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:50:28,216 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:50:28,218 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:50:28,422 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:50:28,423 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:50:28,515 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:50:28,515 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:50:28,516 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:50:28 BoogieIcfgContainer [2024-06-27 17:50:28,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:50:28,518 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:50:28,518 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:50:28,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:50:28,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:50:27" (1/4) ... [2024-06-27 17:50:28,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5585bd55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:50:28, skipping insertion in model container [2024-06-27 17:50:28,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:50:27" (2/4) ... [2024-06-27 17:50:28,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5585bd55 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:50:28, skipping insertion in model container [2024-06-27 17:50:28,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:50:27" (3/4) ... [2024-06-27 17:50:28,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5585bd55 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:50:28, skipping insertion in model container [2024-06-27 17:50:28,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:50:28" (4/4) ... [2024-06-27 17:50:28,524 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:50:28,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:50:28,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 17:50:28,538 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:50:28,574 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:50:28,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 44 transitions, 100 flow [2024-06-27 17:50:28,637 INFO L124 PetriNetUnfolderBase]: 1/41 cut-off events. [2024-06-27 17:50:28,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:50:28,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 1/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-06-27 17:50:28,641 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 44 transitions, 100 flow [2024-06-27 17:50:28,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 38 transitions, 85 flow [2024-06-27 17:50:28,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:50:28,661 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;@405ee4ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:50:28,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 17:50:28,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:50:28,666 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 17:50:28,666 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:50:28,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:28,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:50:28,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:28,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:28,671 INFO L85 PathProgramCache]: Analyzing trace with hash 206032635, now seen corresponding path program 1 times [2024-06-27 17:50:28,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:28,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952753711] [2024-06-27 17:50:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:28,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:28,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:28,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952753711] [2024-06-27 17:50:28,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952753711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:28,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:28,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:50:28,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654115971] [2024-06-27 17:50:28,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:28,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:50:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:28,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:50:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:50:29,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-06-27 17:50:29,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:29,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-06-27 17:50:29,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:29,225 INFO L124 PetriNetUnfolderBase]: 759/1377 cut-off events. [2024-06-27 17:50:29,225 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:50:29,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2581 conditions, 1377 events. 759/1377 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7724 event pairs, 534 based on Foata normal form. 1/1344 useless extension candidates. Maximal degree in co-relation 2569. Up to 1147 conditions per place. [2024-06-27 17:50:29,237 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-06-27 17:50:29,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 185 flow [2024-06-27 17:50:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:50:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:50:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-27 17:50:29,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7196969696969697 [2024-06-27 17:50:29,248 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 85 flow. Second operand 3 states and 95 transitions. [2024-06-27 17:50:29,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 185 flow [2024-06-27 17:50:29,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:29,254 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 112 flow [2024-06-27 17:50:29,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 17:50:29,258 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2024-06-27 17:50:29,258 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 112 flow [2024-06-27 17:50:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:29,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:50:29,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:29,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash 448096154, now seen corresponding path program 1 times [2024-06-27 17:50:29,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:29,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683411072] [2024-06-27 17:50:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683411072] [2024-06-27 17:50:29,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683411072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:29,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:29,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:29,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770352140] [2024-06-27 17:50:29,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:29,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:29,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:29,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2024-06-27 17:50:29,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:29,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:29,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:29,680 INFO L124 PetriNetUnfolderBase]: 1224/2158 cut-off events. [2024-06-27 17:50:29,681 INFO L125 PetriNetUnfolderBase]: For 304/306 co-relation queries the response was YES. [2024-06-27 17:50:29,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 2158 events. 1224/2158 cut-off events. For 304/306 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12561 event pairs, 628 based on Foata normal form. 5/2139 useless extension candidates. Maximal degree in co-relation 4564. Up to 1784 conditions per place. [2024-06-27 17:50:29,693 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 46 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-06-27 17:50:29,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 284 flow [2024-06-27 17:50:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 17:50:29,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 17:50:29,697 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 112 flow. Second operand 4 states and 121 transitions. [2024-06-27 17:50:29,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 284 flow [2024-06-27 17:50:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:29,700 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 164 flow [2024-06-27 17:50:29,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-06-27 17:50:29,700 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-06-27 17:50:29,701 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 164 flow [2024-06-27 17:50:29,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 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) [2024-06-27 17:50:29,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:29,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:29,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:50:29,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:29,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1123686361, now seen corresponding path program 1 times [2024-06-27 17:50:29,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672284016] [2024-06-27 17:50:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:29,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672284016] [2024-06-27 17:50:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672284016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:29,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:29,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592985117] [2024-06-27 17:50:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:29,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:29,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:29,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:29,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:29,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:29,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:30,109 INFO L124 PetriNetUnfolderBase]: 1215/1983 cut-off events. [2024-06-27 17:50:30,110 INFO L125 PetriNetUnfolderBase]: For 804/812 co-relation queries the response was YES. [2024-06-27 17:50:30,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1983 events. 1215/1983 cut-off events. For 804/812 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10933 event pairs, 298 based on Foata normal form. 14/1992 useless extension candidates. Maximal degree in co-relation 4849. Up to 1731 conditions per place. [2024-06-27 17:50:30,119 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 52 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-27 17:50:30,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 352 flow [2024-06-27 17:50:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:50:30,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-06-27 17:50:30,122 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 164 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:50:30,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 352 flow [2024-06-27 17:50:30,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 350 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:30,124 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 195 flow [2024-06-27 17:50:30,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 17:50:30,125 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 8 predicate places. [2024-06-27 17:50:30,125 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 195 flow [2024-06-27 17:50:30,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:30,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:50:30,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:30,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1049378498, now seen corresponding path program 1 times [2024-06-27 17:50:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:30,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559894159] [2024-06-27 17:50:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:30,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:30,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:30,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559894159] [2024-06-27 17:50:30,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559894159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:30,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:30,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:30,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33878434] [2024-06-27 17:50:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:30,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:30,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:30,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:30,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:30,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:30,411 INFO L124 PetriNetUnfolderBase]: 1223/2024 cut-off events. [2024-06-27 17:50:30,411 INFO L125 PetriNetUnfolderBase]: For 1539/1541 co-relation queries the response was YES. [2024-06-27 17:50:30,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5279 conditions, 2024 events. 1223/2024 cut-off events. For 1539/1541 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11333 event pairs, 538 based on Foata normal form. 5/2014 useless extension candidates. Maximal degree in co-relation 5261. Up to 1755 conditions per place. [2024-06-27 17:50:30,425 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 54 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 17:50:30,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 423 flow [2024-06-27 17:50:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 17:50:30,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-06-27 17:50:30,428 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 195 flow. Second operand 4 states and 120 transitions. [2024-06-27 17:50:30,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 423 flow [2024-06-27 17:50:30,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 398 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:30,435 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 251 flow [2024-06-27 17:50:30,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-27 17:50:30,436 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2024-06-27 17:50:30,436 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 251 flow [2024-06-27 17:50:30,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:30,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:30,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:50:30,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:30,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash 262926025, now seen corresponding path program 1 times [2024-06-27 17:50:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:30,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678517317] [2024-06-27 17:50:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:30,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:30,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:30,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678517317] [2024-06-27 17:50:30,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678517317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:30,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:30,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:30,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574974287] [2024-06-27 17:50:30,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:30,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:30,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:30,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:30,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:30,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:30,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 251 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:30,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:30,726 INFO L124 PetriNetUnfolderBase]: 1240/2061 cut-off events. [2024-06-27 17:50:30,727 INFO L125 PetriNetUnfolderBase]: For 2534/2546 co-relation queries the response was YES. [2024-06-27 17:50:30,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 2061 events. 1240/2061 cut-off events. For 2534/2546 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11600 event pairs, 392 based on Foata normal form. 14/2070 useless extension candidates. Maximal degree in co-relation 6052. Up to 1743 conditions per place. [2024-06-27 17:50:30,740 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 61 selfloop transitions, 16 changer transitions 0/90 dead transitions. [2024-06-27 17:50:30,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 528 flow [2024-06-27 17:50:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:50:30,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6772727272727272 [2024-06-27 17:50:30,742 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 251 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:50:30,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 528 flow [2024-06-27 17:50:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 522 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:30,746 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 331 flow [2024-06-27 17:50:30,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-27 17:50:30,746 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2024-06-27 17:50:30,746 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 331 flow [2024-06-27 17:50:30,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:30,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:30,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:50:30,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:30,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1941989415, now seen corresponding path program 2 times [2024-06-27 17:50:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:30,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443525259] [2024-06-27 17:50:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:30,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443525259] [2024-06-27 17:50:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443525259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:30,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:30,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:30,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92178087] [2024-06-27 17:50:30,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:30,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:30,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:30,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:30,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:30,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:30,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:30,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:30,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:30,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,052 INFO L124 PetriNetUnfolderBase]: 1235/2126 cut-off events. [2024-06-27 17:50:31,053 INFO L125 PetriNetUnfolderBase]: For 3924/3936 co-relation queries the response was YES. [2024-06-27 17:50:31,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6602 conditions, 2126 events. 1235/2126 cut-off events. For 3924/3936 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12399 event pairs, 566 based on Foata normal form. 14/2115 useless extension candidates. Maximal degree in co-relation 6579. Up to 1751 conditions per place. [2024-06-27 17:50:31,065 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 56 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-06-27 17:50:31,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 518 flow [2024-06-27 17:50:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-27 17:50:31,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 17:50:31,066 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 331 flow. Second operand 4 states and 121 transitions. [2024-06-27 17:50:31,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 518 flow [2024-06-27 17:50:31,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 487 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:31,073 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 338 flow [2024-06-27 17:50:31,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 17:50:31,076 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 18 predicate places. [2024-06-27 17:50:31,076 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 338 flow [2024-06-27 17:50:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:50:31,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1941989601, now seen corresponding path program 1 times [2024-06-27 17:50:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30643623] [2024-06-27 17:50:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30643623] [2024-06-27 17:50:31,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30643623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475327279] [2024-06-27 17:50:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:31,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:31,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 338 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:31,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,372 INFO L124 PetriNetUnfolderBase]: 1307/2174 cut-off events. [2024-06-27 17:50:31,372 INFO L125 PetriNetUnfolderBase]: For 4549/4561 co-relation queries the response was YES. [2024-06-27 17:50:31,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7049 conditions, 2174 events. 1307/2174 cut-off events. For 4549/4561 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12288 event pairs, 369 based on Foata normal form. 15/2186 useless extension candidates. Maximal degree in co-relation 7024. Up to 1782 conditions per place. [2024-06-27 17:50:31,388 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 56 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-27 17:50:31,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 607 flow [2024-06-27 17:50:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:50:31,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-06-27 17:50:31,389 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 338 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:50:31,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 607 flow [2024-06-27 17:50:31,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 581 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:31,396 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 447 flow [2024-06-27 17:50:31,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 17:50:31,397 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 21 predicate places. [2024-06-27 17:50:31,397 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 447 flow [2024-06-27 17:50:31,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:50:31,398 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,399 INFO L85 PathProgramCache]: Analyzing trace with hash 463536511, now seen corresponding path program 2 times [2024-06-27 17:50:31,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139285402] [2024-06-27 17:50:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139285402] [2024-06-27 17:50:31,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139285402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721536752] [2024-06-27 17:50:31,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:31,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:31,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 447 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:31,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:31,689 INFO L124 PetriNetUnfolderBase]: 1329/2197 cut-off events. [2024-06-27 17:50:31,690 INFO L125 PetriNetUnfolderBase]: For 6501/6515 co-relation queries the response was YES. [2024-06-27 17:50:31,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8009 conditions, 2197 events. 1329/2197 cut-off events. For 6501/6515 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12449 event pairs, 391 based on Foata normal form. 17/2203 useless extension candidates. Maximal degree in co-relation 7982. Up to 1746 conditions per place. [2024-06-27 17:50:31,702 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 63 selfloop transitions, 31 changer transitions 0/107 dead transitions. [2024-06-27 17:50:31,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 107 transitions, 801 flow [2024-06-27 17:50:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-27 17:50:31,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-06-27 17:50:31,704 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 447 flow. Second operand 5 states and 150 transitions. [2024-06-27 17:50:31,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 107 transitions, 801 flow [2024-06-27 17:50:31,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 770 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:31,713 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 598 flow [2024-06-27 17:50:31,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=598, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-27 17:50:31,713 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 26 predicate places. [2024-06-27 17:50:31,713 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 598 flow [2024-06-27 17:50:31,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:31,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:31,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:50:31,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:31,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash 463545439, now seen corresponding path program 1 times [2024-06-27 17:50:31,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:31,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943524705] [2024-06-27 17:50:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:31,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:31,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:31,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943524705] [2024-06-27 17:50:31,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943524705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:31,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:31,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:31,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803136273] [2024-06-27 17:50:31,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:31,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:31,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:31,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:31,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:31,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:31,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:31,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,030 INFO L124 PetriNetUnfolderBase]: 1395/2336 cut-off events. [2024-06-27 17:50:32,030 INFO L125 PetriNetUnfolderBase]: For 7987/7993 co-relation queries the response was YES. [2024-06-27 17:50:32,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9039 conditions, 2336 events. 1395/2336 cut-off events. For 7987/7993 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13575 event pairs, 524 based on Foata normal form. 18/2338 useless extension candidates. Maximal degree in co-relation 9009. Up to 1893 conditions per place. [2024-06-27 17:50:32,047 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 13 changer transitions 0/115 dead transitions. [2024-06-27 17:50:32,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 936 flow [2024-06-27 17:50:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:50:32,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6772727272727272 [2024-06-27 17:50:32,049 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 598 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:50:32,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 936 flow [2024-06-27 17:50:32,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 115 transitions, 900 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-27 17:50:32,059 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 622 flow [2024-06-27 17:50:32,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=622, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2024-06-27 17:50:32,059 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 31 predicate places. [2024-06-27 17:50:32,059 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 622 flow [2024-06-27 17:50:32,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:50:32,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:32,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1652182609, now seen corresponding path program 1 times [2024-06-27 17:50:32,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414561598] [2024-06-27 17:50:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414561598] [2024-06-27 17:50:32,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414561598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:50:32,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708664581] [2024-06-27 17:50:32,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:50:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:50:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:50:32,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:50:32,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 622 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:50:32,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,309 INFO L124 PetriNetUnfolderBase]: 1284/2120 cut-off events. [2024-06-27 17:50:32,310 INFO L125 PetriNetUnfolderBase]: For 7873/7878 co-relation queries the response was YES. [2024-06-27 17:50:32,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8262 conditions, 2120 events. 1284/2120 cut-off events. For 7873/7878 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12061 event pairs, 350 based on Foata normal form. 6/2094 useless extension candidates. Maximal degree in co-relation 8229. Up to 1831 conditions per place. [2024-06-27 17:50:32,324 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 70 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-06-27 17:50:32,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 833 flow [2024-06-27 17:50:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:50:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:50:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 17:50:32,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647727272727273 [2024-06-27 17:50:32,325 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 622 flow. Second operand 4 states and 117 transitions. [2024-06-27 17:50:32,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 833 flow [2024-06-27 17:50:32,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 799 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:32,334 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 653 flow [2024-06-27 17:50:32,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=653, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-27 17:50:32,334 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 33 predicate places. [2024-06-27 17:50:32,335 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 653 flow [2024-06-27 17:50:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:50:32,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:32,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -439226689, now seen corresponding path program 1 times [2024-06-27 17:50:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866139037] [2024-06-27 17:50:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866139037] [2024-06-27 17:50:32,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866139037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:32,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441438492] [2024-06-27 17:50:32,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:32,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:32,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:32,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:32,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 653 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:32,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:32,700 INFO L124 PetriNetUnfolderBase]: 1494/2463 cut-off events. [2024-06-27 17:50:32,700 INFO L125 PetriNetUnfolderBase]: For 8871/8885 co-relation queries the response was YES. [2024-06-27 17:50:32,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 2463 events. 1494/2463 cut-off events. For 8871/8885 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14249 event pairs, 353 based on Foata normal form. 17/2475 useless extension candidates. Maximal degree in co-relation 9538. Up to 1892 conditions per place. [2024-06-27 17:50:32,717 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 96 selfloop transitions, 42 changer transitions 0/151 dead transitions. [2024-06-27 17:50:32,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 151 transitions, 1227 flow [2024-06-27 17:50:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-06-27 17:50:32,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-06-27 17:50:32,719 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 653 flow. Second operand 9 states and 261 transitions. [2024-06-27 17:50:32,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 151 transitions, 1227 flow [2024-06-27 17:50:32,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 1215 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 17:50:32,731 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 847 flow [2024-06-27 17:50:32,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=847, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-27 17:50:32,732 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 43 predicate places. [2024-06-27 17:50:32,732 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 847 flow [2024-06-27 17:50:32,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:32,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:32,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:50:32,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:32,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash 72130849, now seen corresponding path program 2 times [2024-06-27 17:50:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:32,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950057209] [2024-06-27 17:50:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:32,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:32,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950057209] [2024-06-27 17:50:32,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950057209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156046181] [2024-06-27 17:50:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:32,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:32,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:32,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:32,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 847 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:32,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:32,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:32,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,118 INFO L124 PetriNetUnfolderBase]: 1524/2529 cut-off events. [2024-06-27 17:50:33,118 INFO L125 PetriNetUnfolderBase]: For 12743/12757 co-relation queries the response was YES. [2024-06-27 17:50:33,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10858 conditions, 2529 events. 1524/2529 cut-off events. For 12743/12757 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14752 event pairs, 362 based on Foata normal form. 17/2535 useless extension candidates. Maximal degree in co-relation 10819. Up to 1976 conditions per place. [2024-06-27 17:50:33,135 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 34 changer transitions 0/139 dead transitions. [2024-06-27 17:50:33,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1316 flow [2024-06-27 17:50:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:50:33,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6931818181818182 [2024-06-27 17:50:33,136 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 847 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:50:33,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1316 flow [2024-06-27 17:50:33,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1219 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:33,158 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 901 flow [2024-06-27 17:50:33,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=901, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-27 17:50:33,159 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 46 predicate places. [2024-06-27 17:50:33,159 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 901 flow [2024-06-27 17:50:33,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:50:33,160 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:33,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,160 INFO L85 PathProgramCache]: Analyzing trace with hash 72136429, now seen corresponding path program 3 times [2024-06-27 17:50:33,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108136690] [2024-06-27 17:50:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108136690] [2024-06-27 17:50:33,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108136690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:33,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213448712] [2024-06-27 17:50:33,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:33,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:33,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:33,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 901 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:33,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:33,563 INFO L124 PetriNetUnfolderBase]: 1532/2532 cut-off events. [2024-06-27 17:50:33,564 INFO L125 PetriNetUnfolderBase]: For 14152/14166 co-relation queries the response was YES. [2024-06-27 17:50:33,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11289 conditions, 2532 events. 1532/2532 cut-off events. For 14152/14166 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14795 event pairs, 354 based on Foata normal form. 17/2548 useless extension candidates. Maximal degree in co-relation 11247. Up to 1987 conditions per place. [2024-06-27 17:50:33,587 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 95 selfloop transitions, 42 changer transitions 0/150 dead transitions. [2024-06-27 17:50:33,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 1371 flow [2024-06-27 17:50:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 17:50:33,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619318181818182 [2024-06-27 17:50:33,589 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 901 flow. Second operand 8 states and 233 transitions. [2024-06-27 17:50:33,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 1371 flow [2024-06-27 17:50:33,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 150 transitions, 1296 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:33,614 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 969 flow [2024-06-27 17:50:33,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2024-06-27 17:50:33,615 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 51 predicate places. [2024-06-27 17:50:33,615 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 969 flow [2024-06-27 17:50:33,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:33,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:33,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:50:33,616 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:33,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:33,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1484730895, now seen corresponding path program 4 times [2024-06-27 17:50:33,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:33,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35854716] [2024-06-27 17:50:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:33,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35854716] [2024-06-27 17:50:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35854716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:33,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750032254] [2024-06-27 17:50:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:33,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:33,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 969 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:33,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:33,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:33,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,062 INFO L124 PetriNetUnfolderBase]: 1580/2630 cut-off events. [2024-06-27 17:50:34,062 INFO L125 PetriNetUnfolderBase]: For 16597/16611 co-relation queries the response was YES. [2024-06-27 17:50:34,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11845 conditions, 2630 events. 1580/2630 cut-off events. For 16597/16611 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15587 event pairs, 377 based on Foata normal form. 17/2634 useless extension candidates. Maximal degree in co-relation 11802. Up to 1925 conditions per place. [2024-06-27 17:50:34,087 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 94 selfloop transitions, 60 changer transitions 0/167 dead transitions. [2024-06-27 17:50:34,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 167 transitions, 1603 flow [2024-06-27 17:50:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:50:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:50:34,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 17:50:34,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2024-06-27 17:50:34,088 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 969 flow. Second operand 8 states and 238 transitions. [2024-06-27 17:50:34,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 167 transitions, 1603 flow [2024-06-27 17:50:34,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 167 transitions, 1499 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 17:50:34,112 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 1141 flow [2024-06-27 17:50:34,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1141, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-06-27 17:50:34,113 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 54 predicate places. [2024-06-27 17:50:34,113 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 1141 flow [2024-06-27 17:50:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:50:34,114 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:34,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash 789818086, now seen corresponding path program 1 times [2024-06-27 17:50:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166166041] [2024-06-27 17:50:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166166041] [2024-06-27 17:50:34,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166166041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:34,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509974543] [2024-06-27 17:50:34,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:34,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:34,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:34,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 1141 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:34,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,509 INFO L124 PetriNetUnfolderBase]: 1607/2649 cut-off events. [2024-06-27 17:50:34,509 INFO L125 PetriNetUnfolderBase]: For 20594/20608 co-relation queries the response was YES. [2024-06-27 17:50:34,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12927 conditions, 2649 events. 1607/2649 cut-off events. For 20594/20608 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15547 event pairs, 218 based on Foata normal form. 18/2658 useless extension candidates. Maximal degree in co-relation 12882. Up to 2150 conditions per place. [2024-06-27 17:50:34,528 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 122 selfloop transitions, 23 changer transitions 0/158 dead transitions. [2024-06-27 17:50:34,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 158 transitions, 1637 flow [2024-06-27 17:50:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:50:34,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:50:34,530 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 1141 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:50:34,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 158 transitions, 1637 flow [2024-06-27 17:50:34,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 158 transitions, 1537 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:34,558 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1174 flow [2024-06-27 17:50:34,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1174, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-27 17:50:34,559 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 57 predicate places. [2024-06-27 17:50:34,559 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1174 flow [2024-06-27 17:50:34,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:34,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:34,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:50:34,560 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:34,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash 792675046, now seen corresponding path program 2 times [2024-06-27 17:50:34,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:34,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103254404] [2024-06-27 17:50:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:34,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:34,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103254404] [2024-06-27 17:50:34,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103254404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:34,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:34,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970276243] [2024-06-27 17:50:34,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:34,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:34,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:34,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:34,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1174 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:34,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:34,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:34,981 INFO L124 PetriNetUnfolderBase]: 1634/2776 cut-off events. [2024-06-27 17:50:34,982 INFO L125 PetriNetUnfolderBase]: For 23704/23718 co-relation queries the response was YES. [2024-06-27 17:50:34,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13465 conditions, 2776 events. 1634/2776 cut-off events. For 23704/23718 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16779 event pairs, 555 based on Foata normal form. 18/2758 useless extension candidates. Maximal degree in co-relation 13418. Up to 2275 conditions per place. [2024-06-27 17:50:35,000 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 124 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2024-06-27 17:50:35,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 157 transitions, 1578 flow [2024-06-27 17:50:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 17:50:35,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6553030303030303 [2024-06-27 17:50:35,002 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1174 flow. Second operand 6 states and 173 transitions. [2024-06-27 17:50:35,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 157 transitions, 1578 flow [2024-06-27 17:50:35,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1501 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:35,032 INFO L231 Difference]: Finished difference. Result has 109 places, 126 transitions, 1190 flow [2024-06-27 17:50:35,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1190, PETRI_PLACES=109, PETRI_TRANSITIONS=126} [2024-06-27 17:50:35,032 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 61 predicate places. [2024-06-27 17:50:35,032 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 126 transitions, 1190 flow [2024-06-27 17:50:35,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:50:35,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:35,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2058914778, now seen corresponding path program 3 times [2024-06-27 17:50:35,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328315096] [2024-06-27 17:50:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328315096] [2024-06-27 17:50:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328315096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260131108] [2024-06-27 17:50:35,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:35,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 126 transitions, 1190 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:35,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,438 INFO L124 PetriNetUnfolderBase]: 1626/2678 cut-off events. [2024-06-27 17:50:35,439 INFO L125 PetriNetUnfolderBase]: For 23360/23374 co-relation queries the response was YES. [2024-06-27 17:50:35,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13180 conditions, 2678 events. 1626/2678 cut-off events. For 23360/23374 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15696 event pairs, 216 based on Foata normal form. 18/2687 useless extension candidates. Maximal degree in co-relation 13131. Up to 2238 conditions per place. [2024-06-27 17:50:35,458 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 119 selfloop transitions, 19 changer transitions 0/151 dead transitions. [2024-06-27 17:50:35,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 151 transitions, 1526 flow [2024-06-27 17:50:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-27 17:50:35,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-06-27 17:50:35,459 INFO L175 Difference]: Start difference. First operand has 109 places, 126 transitions, 1190 flow. Second operand 5 states and 148 transitions. [2024-06-27 17:50:35,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 151 transitions, 1526 flow [2024-06-27 17:50:35,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1447 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:35,499 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1159 flow [2024-06-27 17:50:35,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1159, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-06-27 17:50:35,499 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 62 predicate places. [2024-06-27 17:50:35,499 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1159 flow [2024-06-27 17:50:35,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:50:35,500 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:35,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2058730080, now seen corresponding path program 1 times [2024-06-27 17:50:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279963118] [2024-06-27 17:50:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:35,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:35,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279963118] [2024-06-27 17:50:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279963118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:35,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:35,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536973456] [2024-06-27 17:50:35,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:35,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:35,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:35,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1159 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:35,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:35,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:35,930 INFO L124 PetriNetUnfolderBase]: 1727/2831 cut-off events. [2024-06-27 17:50:35,930 INFO L125 PetriNetUnfolderBase]: For 25891/25905 co-relation queries the response was YES. [2024-06-27 17:50:35,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13756 conditions, 2831 events. 1727/2831 cut-off events. For 25891/25905 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16681 event pairs, 297 based on Foata normal form. 26/2852 useless extension candidates. Maximal degree in co-relation 13706. Up to 2186 conditions per place. [2024-06-27 17:50:35,951 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 116 selfloop transitions, 29 changer transitions 0/158 dead transitions. [2024-06-27 17:50:35,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 158 transitions, 1605 flow [2024-06-27 17:50:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:50:35,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:50:35,953 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1159 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:50:35,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 158 transitions, 1605 flow [2024-06-27 17:50:35,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1560 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:35,987 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 1220 flow [2024-06-27 17:50:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1220, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-27 17:50:35,988 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 64 predicate places. [2024-06-27 17:50:35,988 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 1220 flow [2024-06-27 17:50:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:50:35,989 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:35,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash 120466388, now seen corresponding path program 1 times [2024-06-27 17:50:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397413258] [2024-06-27 17:50:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397413258] [2024-06-27 17:50:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397413258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:36,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103115157] [2024-06-27 17:50:36,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:36,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:36,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:50:36,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 1220 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:50:36,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,303 INFO L124 PetriNetUnfolderBase]: 1613/2688 cut-off events. [2024-06-27 17:50:36,303 INFO L125 PetriNetUnfolderBase]: For 26820/26826 co-relation queries the response was YES. [2024-06-27 17:50:36,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13443 conditions, 2688 events. 1613/2688 cut-off events. For 26820/26826 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16152 event pairs, 313 based on Foata normal form. 8/2667 useless extension candidates. Maximal degree in co-relation 13392. Up to 2239 conditions per place. [2024-06-27 17:50:36,323 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 25 changer transitions 0/146 dead transitions. [2024-06-27 17:50:36,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 146 transitions, 1516 flow [2024-06-27 17:50:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:50:36,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-06-27 17:50:36,326 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 1220 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:50:36,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 146 transitions, 1516 flow [2024-06-27 17:50:36,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 146 transitions, 1438 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:36,360 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 1208 flow [2024-06-27 17:50:36,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1208, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2024-06-27 17:50:36,361 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 65 predicate places. [2024-06-27 17:50:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 1208 flow [2024-06-27 17:50:36,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:50:36,361 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1903623904, now seen corresponding path program 2 times [2024-06-27 17:50:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157513671] [2024-06-27 17:50:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157513671] [2024-06-27 17:50:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157513671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:36,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775517845] [2024-06-27 17:50:36,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:36,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:36,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 1208 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:36,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:36,760 INFO L124 PetriNetUnfolderBase]: 1795/2950 cut-off events. [2024-06-27 17:50:36,760 INFO L125 PetriNetUnfolderBase]: For 30470/30484 co-relation queries the response was YES. [2024-06-27 17:50:36,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14497 conditions, 2950 events. 1795/2950 cut-off events. For 30470/30484 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17636 event pairs, 364 based on Foata normal form. 26/2960 useless extension candidates. Maximal degree in co-relation 14445. Up to 2340 conditions per place. [2024-06-27 17:50:36,781 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 118 selfloop transitions, 33 changer transitions 0/164 dead transitions. [2024-06-27 17:50:36,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 164 transitions, 1720 flow [2024-06-27 17:50:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 17:50:36,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678030303030303 [2024-06-27 17:50:36,783 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 1208 flow. Second operand 6 states and 179 transitions. [2024-06-27 17:50:36,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 164 transitions, 1720 flow [2024-06-27 17:50:36,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 164 transitions, 1657 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:36,823 INFO L231 Difference]: Finished difference. Result has 114 places, 130 transitions, 1263 flow [2024-06-27 17:50:36,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1263, PETRI_PLACES=114, PETRI_TRANSITIONS=130} [2024-06-27 17:50:36,823 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 66 predicate places. [2024-06-27 17:50:36,824 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 130 transitions, 1263 flow [2024-06-27 17:50:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:36,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:36,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:50:36,824 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:36,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:36,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1209403714, now seen corresponding path program 3 times [2024-06-27 17:50:36,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:36,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963797593] [2024-06-27 17:50:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:36,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:36,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:36,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963797593] [2024-06-27 17:50:36,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963797593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:36,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:36,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:36,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287425306] [2024-06-27 17:50:36,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:36,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:36,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:36,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 130 transitions, 1263 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:36,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:36,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:36,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,208 INFO L124 PetriNetUnfolderBase]: 1933/3156 cut-off events. [2024-06-27 17:50:37,208 INFO L125 PetriNetUnfolderBase]: For 32493/32507 co-relation queries the response was YES. [2024-06-27 17:50:37,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15642 conditions, 3156 events. 1933/3156 cut-off events. For 32493/32507 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19064 event pairs, 335 based on Foata normal form. 26/3166 useless extension candidates. Maximal degree in co-relation 15590. Up to 2129 conditions per place. [2024-06-27 17:50:37,230 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 120 selfloop transitions, 39 changer transitions 0/172 dead transitions. [2024-06-27 17:50:37,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1867 flow [2024-06-27 17:50:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 17:50:37,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6931818181818182 [2024-06-27 17:50:37,231 INFO L175 Difference]: Start difference. First operand has 114 places, 130 transitions, 1263 flow. Second operand 6 states and 183 transitions. [2024-06-27 17:50:37,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1867 flow [2024-06-27 17:50:37,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 172 transitions, 1775 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:37,286 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1310 flow [2024-06-27 17:50:37,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1310, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-27 17:50:37,286 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 68 predicate places. [2024-06-27 17:50:37,286 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1310 flow [2024-06-27 17:50:37,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:50:37,287 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:37,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1391399532, now seen corresponding path program 2 times [2024-06-27 17:50:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266307191] [2024-06-27 17:50:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:37,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266307191] [2024-06-27 17:50:37,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266307191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:37,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416632004] [2024-06-27 17:50:37,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:37,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:50:37,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1310 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:50:37,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:37,636 INFO L124 PetriNetUnfolderBase]: 1851/3034 cut-off events. [2024-06-27 17:50:37,636 INFO L125 PetriNetUnfolderBase]: For 33490/33496 co-relation queries the response was YES. [2024-06-27 17:50:37,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15396 conditions, 3034 events. 1851/3034 cut-off events. For 33490/33496 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18507 event pairs, 390 based on Foata normal form. 8/3002 useless extension candidates. Maximal degree in co-relation 15343. Up to 2533 conditions per place. [2024-06-27 17:50:37,655 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 98 selfloop transitions, 36 changer transitions 0/153 dead transitions. [2024-06-27 17:50:37,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 1729 flow [2024-06-27 17:50:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-27 17:50:37,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-06-27 17:50:37,656 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1310 flow. Second operand 5 states and 146 transitions. [2024-06-27 17:50:37,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 1729 flow [2024-06-27 17:50:37,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 153 transitions, 1654 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:37,702 INFO L231 Difference]: Finished difference. Result has 119 places, 136 transitions, 1351 flow [2024-06-27 17:50:37,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1351, PETRI_PLACES=119, PETRI_TRANSITIONS=136} [2024-06-27 17:50:37,702 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 71 predicate places. [2024-06-27 17:50:37,703 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 136 transitions, 1351 flow [2024-06-27 17:50:37,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:37,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:50:37,703 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:37,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1349350450, now seen corresponding path program 1 times [2024-06-27 17:50:37,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:37,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352468472] [2024-06-27 17:50:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:37,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:37,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:37,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352468472] [2024-06-27 17:50:37,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352468472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:37,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:37,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:50:37,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115888257] [2024-06-27 17:50:37,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:50:37,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:50:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:50:37,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:50:37,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 136 transitions, 1351 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:37,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:37,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:50:37,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:38,042 INFO L124 PetriNetUnfolderBase]: 1899/3103 cut-off events. [2024-06-27 17:50:38,043 INFO L125 PetriNetUnfolderBase]: For 35186/35191 co-relation queries the response was YES. [2024-06-27 17:50:38,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15620 conditions, 3103 events. 1899/3103 cut-off events. For 35186/35191 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18820 event pairs, 378 based on Foata normal form. 15/3089 useless extension candidates. Maximal degree in co-relation 15565. Up to 2634 conditions per place. [2024-06-27 17:50:38,065 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 124 selfloop transitions, 14 changer transitions 0/157 dead transitions. [2024-06-27 17:50:38,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 157 transitions, 1707 flow [2024-06-27 17:50:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 17:50:38,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-06-27 17:50:38,066 INFO L175 Difference]: Start difference. First operand has 119 places, 136 transitions, 1351 flow. Second operand 5 states and 144 transitions. [2024-06-27 17:50:38,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 157 transitions, 1707 flow [2024-06-27 17:50:38,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 157 transitions, 1602 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:38,105 INFO L231 Difference]: Finished difference. Result has 120 places, 138 transitions, 1306 flow [2024-06-27 17:50:38,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1306, PETRI_PLACES=120, PETRI_TRANSITIONS=138} [2024-06-27 17:50:38,106 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 72 predicate places. [2024-06-27 17:50:38,106 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 138 transitions, 1306 flow [2024-06-27 17:50:38,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:38,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:38,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:50:38,107 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:38,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:38,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1946251256, now seen corresponding path program 1 times [2024-06-27 17:50:38,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:38,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895805676] [2024-06-27 17:50:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:38,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:38,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895805676] [2024-06-27 17:50:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895805676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:38,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:38,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799012603] [2024-06-27 17:50:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:38,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:38,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 138 transitions, 1306 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:38,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:38,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:38,746 INFO L124 PetriNetUnfolderBase]: 2985/4955 cut-off events. [2024-06-27 17:50:38,746 INFO L125 PetriNetUnfolderBase]: For 69295/69309 co-relation queries the response was YES. [2024-06-27 17:50:38,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24589 conditions, 4955 events. 2985/4955 cut-off events. For 69295/69309 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33814 event pairs, 635 based on Foata normal form. 50/4998 useless extension candidates. Maximal degree in co-relation 24535. Up to 2286 conditions per place. [2024-06-27 17:50:38,784 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 49 changer transitions 0/214 dead transitions. [2024-06-27 17:50:38,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 214 transitions, 2220 flow [2024-06-27 17:50:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 277 transitions. [2024-06-27 17:50:38,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994949494949495 [2024-06-27 17:50:38,786 INFO L175 Difference]: Start difference. First operand has 120 places, 138 transitions, 1306 flow. Second operand 9 states and 277 transitions. [2024-06-27 17:50:38,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 214 transitions, 2220 flow [2024-06-27 17:50:38,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 214 transitions, 2182 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:38,877 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 1464 flow [2024-06-27 17:50:38,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1464, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2024-06-27 17:50:38,878 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 80 predicate places. [2024-06-27 17:50:38,878 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 1464 flow [2024-06-27 17:50:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:38,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:38,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:50:38,879 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:38,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:38,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1196876222, now seen corresponding path program 2 times [2024-06-27 17:50:38,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:38,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741811258] [2024-06-27 17:50:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:38,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741811258] [2024-06-27 17:50:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741811258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:38,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:38,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:38,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775104293] [2024-06-27 17:50:38,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:38,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:38,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:38,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:38,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:38,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:38,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 1464 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:38,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:38,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:38,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:39,731 INFO L124 PetriNetUnfolderBase]: 3667/6109 cut-off events. [2024-06-27 17:50:39,731 INFO L125 PetriNetUnfolderBase]: For 100726/100740 co-relation queries the response was YES. [2024-06-27 17:50:39,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31298 conditions, 6109 events. 3667/6109 cut-off events. For 100726/100740 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 43748 event pairs, 1072 based on Foata normal form. 50/6152 useless extension candidates. Maximal degree in co-relation 31241. Up to 4092 conditions per place. [2024-06-27 17:50:39,771 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 153 selfloop transitions, 49 changer transitions 0/215 dead transitions. [2024-06-27 17:50:39,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 215 transitions, 2346 flow [2024-06-27 17:50:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 299 transitions. [2024-06-27 17:50:39,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6795454545454546 [2024-06-27 17:50:39,772 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 1464 flow. Second operand 10 states and 299 transitions. [2024-06-27 17:50:39,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 215 transitions, 2346 flow [2024-06-27 17:50:39,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 215 transitions, 2238 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:39,932 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1529 flow [2024-06-27 17:50:39,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1529, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2024-06-27 17:50:39,933 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 86 predicate places. [2024-06-27 17:50:39,933 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1529 flow [2024-06-27 17:50:39,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:39,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:39,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:39,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:50:39,933 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:39,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1196728352, now seen corresponding path program 3 times [2024-06-27 17:50:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:39,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211501083] [2024-06-27 17:50:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:39,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:40,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:40,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211501083] [2024-06-27 17:50:40,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211501083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:40,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:40,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038777708] [2024-06-27 17:50:40,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:40,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:40,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1529 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:40,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:40,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:40,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:40,894 INFO L124 PetriNetUnfolderBase]: 3842/6398 cut-off events. [2024-06-27 17:50:40,894 INFO L125 PetriNetUnfolderBase]: For 105109/105123 co-relation queries the response was YES. [2024-06-27 17:50:40,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32078 conditions, 6398 events. 3842/6398 cut-off events. For 105109/105123 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 46236 event pairs, 1253 based on Foata normal form. 56/6431 useless extension candidates. Maximal degree in co-relation 32019. Up to 5089 conditions per place. [2024-06-27 17:50:41,005 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 142 selfloop transitions, 49 changer transitions 0/204 dead transitions. [2024-06-27 17:50:41,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 204 transitions, 2211 flow [2024-06-27 17:50:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 289 transitions. [2024-06-27 17:50:41,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568181818181819 [2024-06-27 17:50:41,010 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1529 flow. Second operand 10 states and 289 transitions. [2024-06-27 17:50:41,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 204 transitions, 2211 flow [2024-06-27 17:50:41,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 204 transitions, 2088 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:41,159 INFO L231 Difference]: Finished difference. Result has 137 places, 144 transitions, 1550 flow [2024-06-27 17:50:41,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1550, PETRI_PLACES=137, PETRI_TRANSITIONS=144} [2024-06-27 17:50:41,159 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 89 predicate places. [2024-06-27 17:50:41,160 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 144 transitions, 1550 flow [2024-06-27 17:50:41,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:41,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:41,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:50:41,160 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:41,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -601024466, now seen corresponding path program 1 times [2024-06-27 17:50:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274624160] [2024-06-27 17:50:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:41,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:41,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274624160] [2024-06-27 17:50:41,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274624160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:41,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:41,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:41,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136082883] [2024-06-27 17:50:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:41,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:41,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:41,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:41,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 144 transitions, 1550 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:41,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:41,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:41,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:42,049 INFO L124 PetriNetUnfolderBase]: 3853/6497 cut-off events. [2024-06-27 17:50:42,049 INFO L125 PetriNetUnfolderBase]: For 94870/94878 co-relation queries the response was YES. [2024-06-27 17:50:42,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32180 conditions, 6497 events. 3853/6497 cut-off events. For 94870/94878 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 47448 event pairs, 2035 based on Foata normal form. 9/6473 useless extension candidates. Maximal degree in co-relation 32120. Up to 5827 conditions per place. [2024-06-27 17:50:42,093 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 151 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-27 17:50:42,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 183 transitions, 2166 flow [2024-06-27 17:50:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 17:50:42,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-27 17:50:42,095 INFO L175 Difference]: Start difference. First operand has 137 places, 144 transitions, 1550 flow. Second operand 7 states and 189 transitions. [2024-06-27 17:50:42,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 183 transitions, 2166 flow [2024-06-27 17:50:42,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 183 transitions, 2024 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:42,319 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1630 flow [2024-06-27 17:50:42,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1630, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2024-06-27 17:50:42,320 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 89 predicate places. [2024-06-27 17:50:42,320 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1630 flow [2024-06-27 17:50:42,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:42,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:42,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:42,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:50:42,321 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:42,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:42,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1117664802, now seen corresponding path program 4 times [2024-06-27 17:50:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:42,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071532184] [2024-06-27 17:50:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:42,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:42,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:42,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071532184] [2024-06-27 17:50:42,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071532184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:42,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:42,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:42,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218053109] [2024-06-27 17:50:42,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:42,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:42,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:42,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:42,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:42,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:42,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:42,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:42,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:43,249 INFO L124 PetriNetUnfolderBase]: 4150/6920 cut-off events. [2024-06-27 17:50:43,249 INFO L125 PetriNetUnfolderBase]: For 114106/114120 co-relation queries the response was YES. [2024-06-27 17:50:43,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33862 conditions, 6920 events. 4150/6920 cut-off events. For 114106/114120 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 50609 event pairs, 1412 based on Foata normal form. 56/6969 useless extension candidates. Maximal degree in co-relation 33800. Up to 5639 conditions per place. [2024-06-27 17:50:43,303 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 138 selfloop transitions, 47 changer transitions 0/198 dead transitions. [2024-06-27 17:50:43,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 198 transitions, 2212 flow [2024-06-27 17:50:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-27 17:50:43,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685064935064935 [2024-06-27 17:50:43,305 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1630 flow. Second operand 7 states and 211 transitions. [2024-06-27 17:50:43,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 198 transitions, 2212 flow [2024-06-27 17:50:43,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 2185 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 17:50:43,483 INFO L231 Difference]: Finished difference. Result has 142 places, 155 transitions, 1745 flow [2024-06-27 17:50:43,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1745, PETRI_PLACES=142, PETRI_TRANSITIONS=155} [2024-06-27 17:50:43,483 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 94 predicate places. [2024-06-27 17:50:43,483 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 155 transitions, 1745 flow [2024-06-27 17:50:43,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:43,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:43,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:43,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:50:43,484 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:43,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash 603662700, now seen corresponding path program 5 times [2024-06-27 17:50:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728644707] [2024-06-27 17:50:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:43,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:43,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728644707] [2024-06-27 17:50:43,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728644707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:43,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:43,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:43,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617203803] [2024-06-27 17:50:43,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:43,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:43,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:43,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:43,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 155 transitions, 1745 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:43,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:43,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:44,534 INFO L124 PetriNetUnfolderBase]: 4387/7305 cut-off events. [2024-06-27 17:50:44,535 INFO L125 PetriNetUnfolderBase]: For 126568/126582 co-relation queries the response was YES. [2024-06-27 17:50:44,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35982 conditions, 7305 events. 4387/7305 cut-off events. For 126568/126582 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 53722 event pairs, 1495 based on Foata normal form. 56/7360 useless extension candidates. Maximal degree in co-relation 35918. Up to 6072 conditions per place. [2024-06-27 17:50:44,671 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 143 selfloop transitions, 52 changer transitions 0/208 dead transitions. [2024-06-27 17:50:44,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 208 transitions, 2371 flow [2024-06-27 17:50:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-27 17:50:44,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6616161616161617 [2024-06-27 17:50:44,672 INFO L175 Difference]: Start difference. First operand has 142 places, 155 transitions, 1745 flow. Second operand 9 states and 262 transitions. [2024-06-27 17:50:44,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 208 transitions, 2371 flow [2024-06-27 17:50:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 208 transitions, 2249 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:44,850 INFO L231 Difference]: Finished difference. Result has 146 places, 156 transitions, 1777 flow [2024-06-27 17:50:44,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1777, PETRI_PLACES=146, PETRI_TRANSITIONS=156} [2024-06-27 17:50:44,851 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 98 predicate places. [2024-06-27 17:50:44,851 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 156 transitions, 1777 flow [2024-06-27 17:50:44,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:44,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:44,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:50:44,852 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:44,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash 598152450, now seen corresponding path program 6 times [2024-06-27 17:50:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:44,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108769402] [2024-06-27 17:50:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:44,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:44,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108769402] [2024-06-27 17:50:44,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108769402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:44,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:44,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:44,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247425810] [2024-06-27 17:50:44,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:44,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:44,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:44,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:44,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:44,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:44,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 156 transitions, 1777 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:44,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:44,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:45,901 INFO L124 PetriNetUnfolderBase]: 4549/7615 cut-off events. [2024-06-27 17:50:45,901 INFO L125 PetriNetUnfolderBase]: For 125719/125733 co-relation queries the response was YES. [2024-06-27 17:50:45,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36379 conditions, 7615 events. 4549/7615 cut-off events. For 125719/125733 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 56925 event pairs, 1321 based on Foata normal form. 50/7656 useless extension candidates. Maximal degree in co-relation 36314. Up to 4687 conditions per place. [2024-06-27 17:50:46,055 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 147 selfloop transitions, 48 changer transitions 0/208 dead transitions. [2024-06-27 17:50:46,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 208 transitions, 2501 flow [2024-06-27 17:50:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:50:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:50:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 17:50:46,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-06-27 17:50:46,069 INFO L175 Difference]: Start difference. First operand has 146 places, 156 transitions, 1777 flow. Second operand 7 states and 217 transitions. [2024-06-27 17:50:46,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 208 transitions, 2501 flow [2024-06-27 17:50:46,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 208 transitions, 2367 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:46,253 INFO L231 Difference]: Finished difference. Result has 147 places, 158 transitions, 1834 flow [2024-06-27 17:50:46,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1834, PETRI_PLACES=147, PETRI_TRANSITIONS=158} [2024-06-27 17:50:46,253 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 99 predicate places. [2024-06-27 17:50:46,253 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 158 transitions, 1834 flow [2024-06-27 17:50:46,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:46,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:46,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:50:46,254 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:46,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:46,254 INFO L85 PathProgramCache]: Analyzing trace with hash 603877902, now seen corresponding path program 1 times [2024-06-27 17:50:46,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:46,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484520802] [2024-06-27 17:50:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:46,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484520802] [2024-06-27 17:50:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484520802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:46,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:46,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:46,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960265245] [2024-06-27 17:50:46,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:46,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:46,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:46,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 158 transitions, 1834 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:46,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:46,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:46,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:47,281 INFO L124 PetriNetUnfolderBase]: 4776/7981 cut-off events. [2024-06-27 17:50:47,281 INFO L125 PetriNetUnfolderBase]: For 137086/137100 co-relation queries the response was YES. [2024-06-27 17:50:47,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37978 conditions, 7981 events. 4776/7981 cut-off events. For 137086/137100 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 60367 event pairs, 1404 based on Foata normal form. 50/8020 useless extension candidates. Maximal degree in co-relation 37911. Up to 5644 conditions per place. [2024-06-27 17:50:47,339 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 146 selfloop transitions, 58 changer transitions 0/217 dead transitions. [2024-06-27 17:50:47,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 217 transitions, 2522 flow [2024-06-27 17:50:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 267 transitions. [2024-06-27 17:50:47,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2024-06-27 17:50:47,340 INFO L175 Difference]: Start difference. First operand has 147 places, 158 transitions, 1834 flow. Second operand 9 states and 267 transitions. [2024-06-27 17:50:47,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 217 transitions, 2522 flow [2024-06-27 17:50:47,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 217 transitions, 2375 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 17:50:47,575 INFO L231 Difference]: Finished difference. Result has 151 places, 159 transitions, 1855 flow [2024-06-27 17:50:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1855, PETRI_PLACES=151, PETRI_TRANSITIONS=159} [2024-06-27 17:50:47,575 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 103 predicate places. [2024-06-27 17:50:47,575 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 159 transitions, 1855 flow [2024-06-27 17:50:47,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:47,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:47,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:47,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:50:47,576 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:47,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash -560508086, now seen corresponding path program 2 times [2024-06-27 17:50:47,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:47,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470999073] [2024-06-27 17:50:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:47,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:47,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:47,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470999073] [2024-06-27 17:50:47,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470999073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:47,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:47,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:47,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316747657] [2024-06-27 17:50:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:47,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:47,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:47,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:47,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 159 transitions, 1855 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:47,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:47,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:48,465 INFO L124 PetriNetUnfolderBase]: 4773/7983 cut-off events. [2024-06-27 17:50:48,465 INFO L125 PetriNetUnfolderBase]: For 120956/120958 co-relation queries the response was YES. [2024-06-27 17:50:48,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37593 conditions, 7983 events. 4773/7983 cut-off events. For 120956/120958 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 60194 event pairs, 1706 based on Foata normal form. 1/7980 useless extension candidates. Maximal degree in co-relation 37525. Up to 7321 conditions per place. [2024-06-27 17:50:48,543 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 144 selfloop transitions, 18 changer transitions 0/175 dead transitions. [2024-06-27 17:50:48,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 175 transitions, 2220 flow [2024-06-27 17:50:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:50:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:50:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 17:50:48,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-06-27 17:50:48,544 INFO L175 Difference]: Start difference. First operand has 151 places, 159 transitions, 1855 flow. Second operand 5 states and 138 transitions. [2024-06-27 17:50:48,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 175 transitions, 2220 flow [2024-06-27 17:50:48,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 175 transitions, 2064 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:48,788 INFO L231 Difference]: Finished difference. Result has 149 places, 159 transitions, 1741 flow [2024-06-27 17:50:48,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1741, PETRI_PLACES=149, PETRI_TRANSITIONS=159} [2024-06-27 17:50:48,789 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 101 predicate places. [2024-06-27 17:50:48,789 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 159 transitions, 1741 flow [2024-06-27 17:50:48,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:48,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:48,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:50:48,790 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:48,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1116986860, now seen corresponding path program 7 times [2024-06-27 17:50:48,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:48,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088600354] [2024-06-27 17:50:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:48,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:48,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088600354] [2024-06-27 17:50:48,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088600354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:48,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:48,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:48,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217302395] [2024-06-27 17:50:48,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:48,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:48,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:48,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:48,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 159 transitions, 1741 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:48,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:48,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:48,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:49,896 INFO L124 PetriNetUnfolderBase]: 5010/8387 cut-off events. [2024-06-27 17:50:49,896 INFO L125 PetriNetUnfolderBase]: For 145403/145417 co-relation queries the response was YES. [2024-06-27 17:50:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38549 conditions, 8387 events. 5010/8387 cut-off events. For 145403/145417 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 63914 event pairs, 1811 based on Foata normal form. 56/8423 useless extension candidates. Maximal degree in co-relation 38480. Up to 6955 conditions per place. [2024-06-27 17:50:49,971 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 134 selfloop transitions, 72 changer transitions 0/219 dead transitions. [2024-06-27 17:50:49,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 219 transitions, 2611 flow [2024-06-27 17:50:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:49,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-27 17:50:49,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2024-06-27 17:50:49,972 INFO L175 Difference]: Start difference. First operand has 149 places, 159 transitions, 1741 flow. Second operand 9 states and 268 transitions. [2024-06-27 17:50:49,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 219 transitions, 2611 flow [2024-06-27 17:50:50,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 219 transitions, 2575 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:50,209 INFO L231 Difference]: Finished difference. Result has 154 places, 160 transitions, 1905 flow [2024-06-27 17:50:50,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1905, PETRI_PLACES=154, PETRI_TRANSITIONS=160} [2024-06-27 17:50:50,209 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 106 predicate places. [2024-06-27 17:50:50,209 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 160 transitions, 1905 flow [2024-06-27 17:50:50,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:50,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:50,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:50:50,210 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:50,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash 897494192, now seen corresponding path program 2 times [2024-06-27 17:50:50,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:50,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997229390] [2024-06-27 17:50:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:50,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:50,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:50,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997229390] [2024-06-27 17:50:50,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997229390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:50,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:50,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852366343] [2024-06-27 17:50:50,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:50,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:50,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:50,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:50,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:50,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:50,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 160 transitions, 1905 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:50,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:50,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:50,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:51,452 INFO L124 PetriNetUnfolderBase]: 5237/8798 cut-off events. [2024-06-27 17:50:51,452 INFO L125 PetriNetUnfolderBase]: For 158481/158495 co-relation queries the response was YES. [2024-06-27 17:50:51,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40938 conditions, 8798 events. 5237/8798 cut-off events. For 158481/158495 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 67979 event pairs, 1811 based on Foata normal form. 50/8828 useless extension candidates. Maximal degree in co-relation 40868. Up to 6835 conditions per place. [2024-06-27 17:50:51,537 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 144 selfloop transitions, 75 changer transitions 0/232 dead transitions. [2024-06-27 17:50:51,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 232 transitions, 2861 flow [2024-06-27 17:50:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:50:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:50:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 299 transitions. [2024-06-27 17:50:51,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6795454545454546 [2024-06-27 17:50:51,539 INFO L175 Difference]: Start difference. First operand has 154 places, 160 transitions, 1905 flow. Second operand 10 states and 299 transitions. [2024-06-27 17:50:51,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 232 transitions, 2861 flow [2024-06-27 17:50:51,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 232 transitions, 2681 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:51,830 INFO L231 Difference]: Finished difference. Result has 157 places, 161 transitions, 1931 flow [2024-06-27 17:50:51,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1931, PETRI_PLACES=157, PETRI_TRANSITIONS=161} [2024-06-27 17:50:51,831 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 109 predicate places. [2024-06-27 17:50:51,831 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 161 transitions, 1931 flow [2024-06-27 17:50:51,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:51,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:50:51,832 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:51,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1163191472, now seen corresponding path program 3 times [2024-06-27 17:50:51,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:51,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214820367] [2024-06-27 17:50:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:51,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214820367] [2024-06-27 17:50:51,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214820367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:51,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:51,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:50:51,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407655627] [2024-06-27 17:50:51,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:51,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:50:51,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:51,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:50:51,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:50:51,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:51,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 161 transitions, 1931 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:51,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:51,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:51,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:53,091 INFO L124 PetriNetUnfolderBase]: 5606/9361 cut-off events. [2024-06-27 17:50:53,091 INFO L125 PetriNetUnfolderBase]: For 169275/169289 co-relation queries the response was YES. [2024-06-27 17:50:53,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42917 conditions, 9361 events. 5606/9361 cut-off events. For 169275/169289 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 72762 event pairs, 1786 based on Foata normal form. 50/9383 useless extension candidates. Maximal degree in co-relation 42846. Up to 4907 conditions per place. [2024-06-27 17:50:53,184 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 135 selfloop transitions, 82 changer transitions 0/230 dead transitions. [2024-06-27 17:50:53,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 230 transitions, 2863 flow [2024-06-27 17:50:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:50:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:50:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 275 transitions. [2024-06-27 17:50:53,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-06-27 17:50:53,185 INFO L175 Difference]: Start difference. First operand has 157 places, 161 transitions, 1931 flow. Second operand 9 states and 275 transitions. [2024-06-27 17:50:53,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 230 transitions, 2863 flow [2024-06-27 17:50:53,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 230 transitions, 2673 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 17:50:53,526 INFO L231 Difference]: Finished difference. Result has 157 places, 160 transitions, 1853 flow [2024-06-27 17:50:53,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1853, PETRI_PLACES=157, PETRI_TRANSITIONS=160} [2024-06-27 17:50:53,526 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 109 predicate places. [2024-06-27 17:50:53,526 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 160 transitions, 1853 flow [2024-06-27 17:50:53,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:53,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:53,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:53,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:50:53,527 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:53,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash 154220624, now seen corresponding path program 3 times [2024-06-27 17:50:53,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:53,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029145200] [2024-06-27 17:50:53,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:53,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:53,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:53,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029145200] [2024-06-27 17:50:53,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029145200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:53,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:53,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:53,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169877049] [2024-06-27 17:50:53,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:53,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:53,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:53,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:53,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:53,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 1853 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:53,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:53,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:53,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:54,637 INFO L124 PetriNetUnfolderBase]: 5603/9360 cut-off events. [2024-06-27 17:50:54,637 INFO L125 PetriNetUnfolderBase]: For 152486/152488 co-relation queries the response was YES. [2024-06-27 17:50:54,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42811 conditions, 9360 events. 5603/9360 cut-off events. For 152486/152488 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 72819 event pairs, 2122 based on Foata normal form. 1/9356 useless extension candidates. Maximal degree in co-relation 42739. Up to 8630 conditions per place. [2024-06-27 17:50:54,716 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 148 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-06-27 17:50:54,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 184 transitions, 2299 flow [2024-06-27 17:50:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 17:50:54,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-27 17:50:54,718 INFO L175 Difference]: Start difference. First operand has 157 places, 160 transitions, 1853 flow. Second operand 6 states and 160 transitions. [2024-06-27 17:50:54,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 184 transitions, 2299 flow [2024-06-27 17:50:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 184 transitions, 2085 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 17:50:55,065 INFO L231 Difference]: Finished difference. Result has 157 places, 165 transitions, 1762 flow [2024-06-27 17:50:55,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1762, PETRI_PLACES=157, PETRI_TRANSITIONS=165} [2024-06-27 17:50:55,065 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 109 predicate places. [2024-06-27 17:50:55,066 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 165 transitions, 1762 flow [2024-06-27 17:50:55,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:55,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:55,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:55,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:50:55,066 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:55,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1442621715, now seen corresponding path program 1 times [2024-06-27 17:50:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143171560] [2024-06-27 17:50:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:55,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143171560] [2024-06-27 17:50:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143171560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:55,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:55,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139414241] [2024-06-27 17:50:55,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:55,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:55,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:55,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:55,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:55,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:50:55,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 165 transitions, 1762 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:50:55,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:55,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:50:55,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:56,113 INFO L124 PetriNetUnfolderBase]: 5346/9025 cut-off events. [2024-06-27 17:50:56,113 INFO L125 PetriNetUnfolderBase]: For 142125/142131 co-relation queries the response was YES. [2024-06-27 17:50:56,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39780 conditions, 9025 events. 5346/9025 cut-off events. For 142125/142131 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 70529 event pairs, 1949 based on Foata normal form. 17/9009 useless extension candidates. Maximal degree in co-relation 39706. Up to 7967 conditions per place. [2024-06-27 17:50:56,197 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 136 selfloop transitions, 33 changer transitions 0/192 dead transitions. [2024-06-27 17:50:56,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 192 transitions, 2208 flow [2024-06-27 17:50:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 17:50:56,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6553030303030303 [2024-06-27 17:50:56,199 INFO L175 Difference]: Start difference. First operand has 157 places, 165 transitions, 1762 flow. Second operand 6 states and 173 transitions. [2024-06-27 17:50:56,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 192 transitions, 2208 flow [2024-06-27 17:50:56,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 192 transitions, 2144 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 17:50:56,437 INFO L231 Difference]: Finished difference. Result has 160 places, 167 transitions, 1816 flow [2024-06-27 17:50:56,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1816, PETRI_PLACES=160, PETRI_TRANSITIONS=167} [2024-06-27 17:50:56,438 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 112 predicate places. [2024-06-27 17:50:56,438 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 167 transitions, 1816 flow [2024-06-27 17:50:56,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:50:56,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:56,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:56,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:50:56,438 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:56,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash -201731317, now seen corresponding path program 2 times [2024-06-27 17:50:56,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:56,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27780002] [2024-06-27 17:50:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:56,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:56,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27780002] [2024-06-27 17:50:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27780002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:56,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:56,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:56,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215804344] [2024-06-27 17:50:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:56,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:56,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:50:56,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 167 transitions, 1816 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:50:56,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:56,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:50:56,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:57,595 INFO L124 PetriNetUnfolderBase]: 5436/9166 cut-off events. [2024-06-27 17:50:57,596 INFO L125 PetriNetUnfolderBase]: For 151825/151834 co-relation queries the response was YES. [2024-06-27 17:50:57,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41049 conditions, 9166 events. 5436/9166 cut-off events. For 151825/151834 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 71862 event pairs, 2056 based on Foata normal form. 20/9143 useless extension candidates. Maximal degree in co-relation 40974. Up to 8150 conditions per place. [2024-06-27 17:50:57,835 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 126 selfloop transitions, 44 changer transitions 0/193 dead transitions. [2024-06-27 17:50:57,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 193 transitions, 2404 flow [2024-06-27 17:50:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 17:50:57,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-27 17:50:57,849 INFO L175 Difference]: Start difference. First operand has 160 places, 167 transitions, 1816 flow. Second operand 6 states and 172 transitions. [2024-06-27 17:50:57,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 193 transitions, 2404 flow [2024-06-27 17:50:58,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 193 transitions, 2322 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:58,099 INFO L231 Difference]: Finished difference. Result has 162 places, 169 transitions, 1873 flow [2024-06-27 17:50:58,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1873, PETRI_PLACES=162, PETRI_TRANSITIONS=169} [2024-06-27 17:50:58,100 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 114 predicate places. [2024-06-27 17:50:58,100 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 169 transitions, 1873 flow [2024-06-27 17:50:58,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:50:58,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:58,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:58,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:50:58,100 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:58,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:58,101 INFO L85 PathProgramCache]: Analyzing trace with hash -354305071, now seen corresponding path program 3 times [2024-06-27 17:50:58,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:58,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667303552] [2024-06-27 17:50:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:58,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:58,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:58,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667303552] [2024-06-27 17:50:58,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667303552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:58,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:58,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:50:58,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140167811] [2024-06-27 17:50:58,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:58,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:50:58,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:50:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:50:58,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-27 17:50:58,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 169 transitions, 1873 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:50:58,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:58,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-27 17:50:58,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:50:59,164 INFO L124 PetriNetUnfolderBase]: 5575/9391 cut-off events. [2024-06-27 17:50:59,165 INFO L125 PetriNetUnfolderBase]: For 162937/162946 co-relation queries the response was YES. [2024-06-27 17:50:59,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42357 conditions, 9391 events. 5575/9391 cut-off events. For 162937/162946 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 73899 event pairs, 1977 based on Foata normal form. 20/9366 useless extension candidates. Maximal degree in co-relation 42281. Up to 7933 conditions per place. [2024-06-27 17:50:59,239 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 129 selfloop transitions, 49 changer transitions 0/201 dead transitions. [2024-06-27 17:50:59,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 201 transitions, 2599 flow [2024-06-27 17:50:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:50:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:50:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-27 17:50:59,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:50:59,241 INFO L175 Difference]: Start difference. First operand has 162 places, 169 transitions, 1873 flow. Second operand 6 states and 176 transitions. [2024-06-27 17:50:59,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 201 transitions, 2599 flow [2024-06-27 17:50:59,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 201 transitions, 2484 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 17:50:59,457 INFO L231 Difference]: Finished difference. Result has 164 places, 172 transitions, 1925 flow [2024-06-27 17:50:59,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1925, PETRI_PLACES=164, PETRI_TRANSITIONS=172} [2024-06-27 17:50:59,457 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 116 predicate places. [2024-06-27 17:50:59,457 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 172 transitions, 1925 flow [2024-06-27 17:50:59,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-27 17:50:59,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:50:59,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:50:59,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:50:59,458 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:50:59,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:50:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2064566259, now seen corresponding path program 1 times [2024-06-27 17:50:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:50:59,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138488051] [2024-06-27 17:50:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:50:59,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:50:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:50:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:50:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:50:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138488051] [2024-06-27 17:50:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138488051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:50:59,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:50:59,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:50:59,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085125954] [2024-06-27 17:50:59,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:50:59,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:50:59,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:50:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:50:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:50:59,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:50:59,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 172 transitions, 1925 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:50:59,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:50:59,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:50:59,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:00,661 INFO L124 PetriNetUnfolderBase]: 5718/9513 cut-off events. [2024-06-27 17:51:00,661 INFO L125 PetriNetUnfolderBase]: For 163776/163788 co-relation queries the response was YES. [2024-06-27 17:51:00,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43514 conditions, 9513 events. 5718/9513 cut-off events. For 163776/163788 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 73734 event pairs, 2061 based on Foata normal form. 14/9520 useless extension candidates. Maximal degree in co-relation 43437. Up to 8541 conditions per place. [2024-06-27 17:51:00,735 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 150 selfloop transitions, 59 changer transitions 0/222 dead transitions. [2024-06-27 17:51:00,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 222 transitions, 2627 flow [2024-06-27 17:51:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:51:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:51:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 258 transitions. [2024-06-27 17:51:00,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-27 17:51:00,736 INFO L175 Difference]: Start difference. First operand has 164 places, 172 transitions, 1925 flow. Second operand 9 states and 258 transitions. [2024-06-27 17:51:00,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 222 transitions, 2627 flow [2024-06-27 17:51:01,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 222 transitions, 2539 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 17:51:01,018 INFO L231 Difference]: Finished difference. Result has 171 places, 175 transitions, 1991 flow [2024-06-27 17:51:01,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1991, PETRI_PLACES=171, PETRI_TRANSITIONS=175} [2024-06-27 17:51:01,019 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 123 predicate places. [2024-06-27 17:51:01,019 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 175 transitions, 1991 flow [2024-06-27 17:51:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:01,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:01,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:01,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:51:01,020 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:01,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:01,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2058852339, now seen corresponding path program 2 times [2024-06-27 17:51:01,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:01,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027098293] [2024-06-27 17:51:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:01,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:01,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027098293] [2024-06-27 17:51:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027098293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:01,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798873001] [2024-06-27 17:51:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:01,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:01,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:01,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 175 transitions, 1991 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:01,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:01,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:01,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:02,334 INFO L124 PetriNetUnfolderBase]: 5757/9574 cut-off events. [2024-06-27 17:51:02,334 INFO L125 PetriNetUnfolderBase]: For 170649/170661 co-relation queries the response was YES. [2024-06-27 17:51:02,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44137 conditions, 9574 events. 5757/9574 cut-off events. For 170649/170661 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 74166 event pairs, 2061 based on Foata normal form. 13/9580 useless extension candidates. Maximal degree in co-relation 44058. Up to 8574 conditions per place. [2024-06-27 17:51:02,417 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 141 selfloop transitions, 66 changer transitions 0/220 dead transitions. [2024-06-27 17:51:02,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 220 transitions, 2743 flow [2024-06-27 17:51:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 17:51:02,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-06-27 17:51:02,418 INFO L175 Difference]: Start difference. First operand has 171 places, 175 transitions, 1991 flow. Second operand 8 states and 228 transitions. [2024-06-27 17:51:02,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 220 transitions, 2743 flow [2024-06-27 17:51:02,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 220 transitions, 2629 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:02,737 INFO L231 Difference]: Finished difference. Result has 174 places, 182 transitions, 2134 flow [2024-06-27 17:51:02,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2134, PETRI_PLACES=174, PETRI_TRANSITIONS=182} [2024-06-27 17:51:02,737 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 126 predicate places. [2024-06-27 17:51:02,737 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 182 transitions, 2134 flow [2024-06-27 17:51:02,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:02,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:02,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:02,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:51:02,738 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:02,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2067426195, now seen corresponding path program 1 times [2024-06-27 17:51:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:02,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744223418] [2024-06-27 17:51:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:02,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:02,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:02,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744223418] [2024-06-27 17:51:02,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744223418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:02,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:02,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:02,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928478263] [2024-06-27 17:51:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:02,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:02,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:02,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 182 transitions, 2134 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:02,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:02,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:02,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:04,147 INFO L124 PetriNetUnfolderBase]: 5803/9688 cut-off events. [2024-06-27 17:51:04,148 INFO L125 PetriNetUnfolderBase]: For 182619/182627 co-relation queries the response was YES. [2024-06-27 17:51:04,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44748 conditions, 9688 events. 5803/9688 cut-off events. For 182619/182627 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 75234 event pairs, 3099 based on Foata normal form. 14/9675 useless extension candidates. Maximal degree in co-relation 44667. Up to 8729 conditions per place. [2024-06-27 17:51:04,221 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 189 selfloop transitions, 23 changer transitions 0/225 dead transitions. [2024-06-27 17:51:04,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 225 transitions, 2768 flow [2024-06-27 17:51:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 17:51:04,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-27 17:51:04,223 INFO L175 Difference]: Start difference. First operand has 174 places, 182 transitions, 2134 flow. Second operand 8 states and 218 transitions. [2024-06-27 17:51:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 225 transitions, 2768 flow [2024-06-27 17:51:04,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 225 transitions, 2674 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:51:04,511 INFO L231 Difference]: Finished difference. Result has 178 places, 183 transitions, 2099 flow [2024-06-27 17:51:04,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2099, PETRI_PLACES=178, PETRI_TRANSITIONS=183} [2024-06-27 17:51:04,516 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 130 predicate places. [2024-06-27 17:51:04,516 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 183 transitions, 2099 flow [2024-06-27 17:51:04,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:04,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:04,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:04,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:51:04,516 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:04,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:04,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2058855315, now seen corresponding path program 2 times [2024-06-27 17:51:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:04,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520316113] [2024-06-27 17:51:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:04,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:04,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520316113] [2024-06-27 17:51:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520316113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:04,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:04,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:04,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914031669] [2024-06-27 17:51:04,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:04,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:04,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:04,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 183 transitions, 2099 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:04,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:04,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:04,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:05,700 INFO L124 PetriNetUnfolderBase]: 5867/9726 cut-off events. [2024-06-27 17:51:05,701 INFO L125 PetriNetUnfolderBase]: For 191441/191449 co-relation queries the response was YES. [2024-06-27 17:51:05,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45135 conditions, 9726 events. 5867/9726 cut-off events. For 191441/191449 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 75282 event pairs, 2054 based on Foata normal form. 16/9741 useless extension candidates. Maximal degree in co-relation 45053. Up to 8943 conditions per place. [2024-06-27 17:51:05,791 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 186 selfloop transitions, 20 changer transitions 0/219 dead transitions. [2024-06-27 17:51:05,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 219 transitions, 2621 flow [2024-06-27 17:51:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 17:51:05,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-27 17:51:05,792 INFO L175 Difference]: Start difference. First operand has 178 places, 183 transitions, 2099 flow. Second operand 8 states and 212 transitions. [2024-06-27 17:51:05,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 219 transitions, 2621 flow [2024-06-27 17:51:06,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 219 transitions, 2582 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:06,338 INFO L231 Difference]: Finished difference. Result has 181 places, 184 transitions, 2118 flow [2024-06-27 17:51:06,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2118, PETRI_PLACES=181, PETRI_TRANSITIONS=184} [2024-06-27 17:51:06,338 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 133 predicate places. [2024-06-27 17:51:06,338 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 184 transitions, 2118 flow [2024-06-27 17:51:06,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:06,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:06,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:06,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:51:06,339 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:06,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:06,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1949275089, now seen corresponding path program 3 times [2024-06-27 17:51:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936315225] [2024-06-27 17:51:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:06,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:06,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936315225] [2024-06-27 17:51:06,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936315225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:06,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:06,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814281882] [2024-06-27 17:51:06,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:06,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:06,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:06,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:06,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 184 transitions, 2118 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:06,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:06,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:07,510 INFO L124 PetriNetUnfolderBase]: 5861/9732 cut-off events. [2024-06-27 17:51:07,510 INFO L125 PetriNetUnfolderBase]: For 192647/192659 co-relation queries the response was YES. [2024-06-27 17:51:07,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45188 conditions, 9732 events. 5861/9732 cut-off events. For 192647/192659 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 75425 event pairs, 2075 based on Foata normal form. 14/9737 useless extension candidates. Maximal degree in co-relation 45105. Up to 8806 conditions per place. [2024-06-27 17:51:07,594 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 148 selfloop transitions, 51 changer transitions 0/212 dead transitions. [2024-06-27 17:51:07,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 212 transitions, 2664 flow [2024-06-27 17:51:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-06-27 17:51:07,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6704545454545454 [2024-06-27 17:51:07,595 INFO L175 Difference]: Start difference. First operand has 181 places, 184 transitions, 2118 flow. Second operand 6 states and 177 transitions. [2024-06-27 17:51:07,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 212 transitions, 2664 flow [2024-06-27 17:51:08,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 212 transitions, 2621 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 17:51:08,164 INFO L231 Difference]: Finished difference. Result has 181 places, 184 transitions, 2190 flow [2024-06-27 17:51:08,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2190, PETRI_PLACES=181, PETRI_TRANSITIONS=184} [2024-06-27 17:51:08,165 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 133 predicate places. [2024-06-27 17:51:08,165 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 184 transitions, 2190 flow [2024-06-27 17:51:08,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:08,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:08,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:08,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:51:08,166 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:08,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash -16421615, now seen corresponding path program 4 times [2024-06-27 17:51:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:08,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361954288] [2024-06-27 17:51:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:08,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:08,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361954288] [2024-06-27 17:51:08,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361954288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:08,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:08,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825076197] [2024-06-27 17:51:08,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:08,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:08,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:08,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:08,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 184 transitions, 2190 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:08,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:08,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:08,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:09,532 INFO L124 PetriNetUnfolderBase]: 5828/9669 cut-off events. [2024-06-27 17:51:09,532 INFO L125 PetriNetUnfolderBase]: For 199145/199157 co-relation queries the response was YES. [2024-06-27 17:51:09,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45189 conditions, 9669 events. 5828/9669 cut-off events. For 199145/199157 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 74883 event pairs, 2057 based on Foata normal form. 14/9678 useless extension candidates. Maximal degree in co-relation 45105. Up to 8747 conditions per place. [2024-06-27 17:51:09,611 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 148 selfloop transitions, 56 changer transitions 0/217 dead transitions. [2024-06-27 17:51:09,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 217 transitions, 2674 flow [2024-06-27 17:51:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:51:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:51:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 17:51:09,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392045454545454 [2024-06-27 17:51:09,612 INFO L175 Difference]: Start difference. First operand has 181 places, 184 transitions, 2190 flow. Second operand 8 states and 225 transitions. [2024-06-27 17:51:09,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 217 transitions, 2674 flow [2024-06-27 17:51:10,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 217 transitions, 2581 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:51:10,013 INFO L231 Difference]: Finished difference. Result has 184 places, 184 transitions, 2220 flow [2024-06-27 17:51:10,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2220, PETRI_PLACES=184, PETRI_TRANSITIONS=184} [2024-06-27 17:51:10,014 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 136 predicate places. [2024-06-27 17:51:10,014 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 184 transitions, 2220 flow [2024-06-27 17:51:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:10,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:10,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:10,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:51:10,015 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:10,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1777316823, now seen corresponding path program 5 times [2024-06-27 17:51:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:10,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59584906] [2024-06-27 17:51:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:10,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59584906] [2024-06-27 17:51:10,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59584906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:10,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:10,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219056879] [2024-06-27 17:51:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:10,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:10,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:10,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 184 transitions, 2220 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:10,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:10,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:10,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:11,350 INFO L124 PetriNetUnfolderBase]: 5798/9635 cut-off events. [2024-06-27 17:51:11,350 INFO L125 PetriNetUnfolderBase]: For 198597/198603 co-relation queries the response was YES. [2024-06-27 17:51:11,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45003 conditions, 9635 events. 5798/9635 cut-off events. For 198597/198603 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 74660 event pairs, 2059 based on Foata normal form. 5/9622 useless extension candidates. Maximal degree in co-relation 44919. Up to 8620 conditions per place. [2024-06-27 17:51:11,423 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 126 selfloop transitions, 69 changer transitions 0/208 dead transitions. [2024-06-27 17:51:11,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 208 transitions, 2664 flow [2024-06-27 17:51:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:51:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:51:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 17:51:11,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6298701298701299 [2024-06-27 17:51:11,424 INFO L175 Difference]: Start difference. First operand has 184 places, 184 transitions, 2220 flow. Second operand 7 states and 194 transitions. [2024-06-27 17:51:11,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 208 transitions, 2664 flow [2024-06-27 17:51:11,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 208 transitions, 2455 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 17:51:11,783 INFO L231 Difference]: Finished difference. Result has 180 places, 184 transitions, 2155 flow [2024-06-27 17:51:11,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2155, PETRI_PLACES=180, PETRI_TRANSITIONS=184} [2024-06-27 17:51:11,783 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 132 predicate places. [2024-06-27 17:51:11,783 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 184 transitions, 2155 flow [2024-06-27 17:51:11,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:11,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:11,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:51:11,784 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:11,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1777319799, now seen corresponding path program 3 times [2024-06-27 17:51:11,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:11,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148508535] [2024-06-27 17:51:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:11,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:11,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148508535] [2024-06-27 17:51:11,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148508535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:11,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599488767] [2024-06-27 17:51:11,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:11,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:11,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:11,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 184 transitions, 2155 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:11,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:11,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:11,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:51:13,080 INFO L124 PetriNetUnfolderBase]: 5780/9619 cut-off events. [2024-06-27 17:51:13,081 INFO L125 PetriNetUnfolderBase]: For 195641/195643 co-relation queries the response was YES. [2024-06-27 17:51:13,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44441 conditions, 9619 events. 5780/9619 cut-off events. For 195641/195643 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 74679 event pairs, 3269 based on Foata normal form. 8/9601 useless extension candidates. Maximal degree in co-relation 44358. Up to 8789 conditions per place. [2024-06-27 17:51:13,173 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 175 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-27 17:51:13,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 207 transitions, 2614 flow [2024-06-27 17:51:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:51:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:51:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-27 17:51:13,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-06-27 17:51:13,174 INFO L175 Difference]: Start difference. First operand has 180 places, 184 transitions, 2155 flow. Second operand 6 states and 162 transitions. [2024-06-27 17:51:13,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 207 transitions, 2614 flow [2024-06-27 17:51:13,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 207 transitions, 2423 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 17:51:13,577 INFO L231 Difference]: Finished difference. Result has 178 places, 184 transitions, 2007 flow [2024-06-27 17:51:13,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2007, PETRI_PLACES=178, PETRI_TRANSITIONS=184} [2024-06-27 17:51:13,577 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 130 predicate places. [2024-06-27 17:51:13,578 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 184 transitions, 2007 flow [2024-06-27 17:51:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:13,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:51:13,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:51:13,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 17:51:13,578 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 17:51:13,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:51:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1771599023, now seen corresponding path program 1 times [2024-06-27 17:51:13,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:51:13,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840202581] [2024-06-27 17:51:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:51:13,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:51:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:51:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:51:13,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:51:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840202581] [2024-06-27 17:51:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840202581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:51:13,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:51:13,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:51:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186978422] [2024-06-27 17:51:13,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:51:13,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:51:13,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:51:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:51:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:51:13,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-27 17:51:13,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 184 transitions, 2007 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:51:13,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:51:13,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-27 17:51:13,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand