./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_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/safe019_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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe019_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 17:53:48,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:53:48,831 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:53:48,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:53:48,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:53:48,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:53:48,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:53:48,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:53:48,862 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:53:48,865 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:53:48,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:53:48,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:53:48,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:53:48,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:53:48,868 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:53:48,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:53:48,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:53:48,868 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:53:48,869 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:53:48,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:53:48,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:53:48,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:53:48,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:53:48,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:53:48,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:53:48,870 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:53:48,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:53:48,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:53:48,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:53:48,871 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:53:48,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:53:48,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:53:48,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:53:48,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:53:48,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:53:48,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:53:48,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:53:48,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:53:48,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:53:48,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:53:48,874 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:53:48,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:53:48,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:53:48,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:53:49,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:53:49,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:53:49,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:53:49,124 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:53:49,125 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:53:49,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:53:50,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:53:50,381 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:53:50,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:53:50,399 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe014f017/d7a15581d7354b8fb0246db681ccff49/FLAGe61afe3e1 [2024-06-27 17:53:50,410 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe014f017/d7a15581d7354b8fb0246db681ccff49 [2024-06-27 17:53:50,412 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:53:50,412 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:53:50,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 17:53:50,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:53:50,526 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:53:50,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:53:50,528 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:53:50,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:53:50,533 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:53:50" (1/2) ... [2024-06-27 17:53:50,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bfda679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:53:50, skipping insertion in model container [2024-06-27 17:53:50,534 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:53:50" (1/2) ... [2024-06-27 17:53:50,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@154f775b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:53:50, skipping insertion in model container [2024-06-27 17:53:50,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:53:50" (2/2) ... [2024-06-27 17:53:50,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bfda679 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:53:50, skipping insertion in model container [2024-06-27 17:53:50,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:53:50" (2/2) ... [2024-06-27 17:53:50,538 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:53:50,578 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:53:50,579 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] (((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:53:50,580 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:53:50,580 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] (((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:53:50,580 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) [2024-06-27 17:53:50,580 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:53:50,581 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-06-27 17:53:50,620 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:53:50,778 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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-06-27 17:53:50,950 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:53:50,957 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:53:50,985 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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:53:51,042 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:53:51,074 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:53:51,075 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:53:51 WrapperNode [2024-06-27 17:53:51,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:53:51,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:53:51,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:53:51,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:53:51,083 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,108 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,141 INFO L138 Inliner]: procedures = 176, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2024-06-27 17:53:51,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:53:51,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:53:51,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:53:51,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:53:51,150 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,151 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,161 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,181 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 17:53:51,181 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,182 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,194 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,196 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,197 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,198 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:53:51,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:53:51,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:53:51,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:53:51,201 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 05:53:51" (1/1) ... [2024-06-27 17:53:51,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:53:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:53:51,223 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 17:53:51,240 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 17:53:51,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:53:51,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:53:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:53:51,285 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:53:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:53:51,285 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:53:51,285 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 17:53:51,285 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 17:53:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 17:53:51,286 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 17:53:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:53:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:53:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:53:51,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:53:51,299 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 17:53:51,385 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:53:51,386 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:53:51,570 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:53:51,570 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:53:51,643 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:53:51,645 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:53:51,646 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:53:51 BoogieIcfgContainer [2024-06-27 17:53:51,646 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:53:51,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:53:51,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:53:51,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:53:51,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:53:50" (1/4) ... [2024-06-27 17:53:51,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fbc8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:53:51, skipping insertion in model container [2024-06-27 17:53:51,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:53:50" (2/4) ... [2024-06-27 17:53:51,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fbc8b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:53:51, skipping insertion in model container [2024-06-27 17:53:51,653 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 05:53:51" (3/4) ... [2024-06-27 17:53:51,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77fbc8b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:53:51, skipping insertion in model container [2024-06-27 17:53:51,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:53:51" (4/4) ... [2024-06-27 17:53:51,655 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 17:53:51,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:53:51,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 17:53:51,669 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:53:51,708 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:53:51,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 54 transitions, 124 flow [2024-06-27 17:53:51,769 INFO L124 PetriNetUnfolderBase]: 1/50 cut-off events. [2024-06-27 17:53:51,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:53:51,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 1/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-06-27 17:53:51,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 54 transitions, 124 flow [2024-06-27 17:53:51,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 47 transitions, 106 flow [2024-06-27 17:53:51,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:53:51,793 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;@5af17bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:53:51,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 17:53:51,796 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:53:51,796 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 17:53:51,796 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:53:51,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:51,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:53:51,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:51,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:51,801 INFO L85 PathProgramCache]: Analyzing trace with hash 220070101, now seen corresponding path program 1 times [2024-06-27 17:53:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:51,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716870953] [2024-06-27 17:53:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:52,075 INFO 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 17:53:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716870953] [2024-06-27 17:53:52,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716870953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:52,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:52,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:53:52,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684906098] [2024-06-27 17:53:52,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:52,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:53:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:52,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:53:52,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:53:52,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 54 [2024-06-27 17:53:52,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:52,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:52,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 54 [2024-06-27 17:53:52,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:52,567 INFO L124 PetriNetUnfolderBase]: 3091/4806 cut-off events. [2024-06-27 17:53:52,567 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-06-27 17:53:52,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9240 conditions, 4806 events. 3091/4806 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30076 event pairs, 2323 based on Foata normal form. 1/4667 useless extension candidates. Maximal degree in co-relation 9227. Up to 4287 conditions per place. [2024-06-27 17:53:52,636 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 40 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2024-06-27 17:53:52,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 237 flow [2024-06-27 17:53:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:53:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:53:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 118 transitions. [2024-06-27 17:53:52,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2024-06-27 17:53:52,648 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 106 flow. Second operand 3 states and 118 transitions. [2024-06-27 17:53:52,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 237 flow [2024-06-27 17:53:52,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:53:52,655 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 141 flow [2024-06-27 17:53:52,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-27 17:53:52,660 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-06-27 17:53:52,660 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 141 flow [2024-06-27 17:53:52,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:52,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:52,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:52,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:53:52,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:52,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2080785477, now seen corresponding path program 1 times [2024-06-27 17:53:52,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:52,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197057168] [2024-06-27 17:53:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:52,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:52,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197057168] [2024-06-27 17:53:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197057168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:52,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:52,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:52,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911091428] [2024-06-27 17:53:52,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:52,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:52,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:52,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:53:52,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:53:52,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:52,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:53:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:53,562 INFO L124 PetriNetUnfolderBase]: 5391/8375 cut-off events. [2024-06-27 17:53:53,562 INFO L125 PetriNetUnfolderBase]: For 1502/1516 co-relation queries the response was YES. [2024-06-27 17:53:53,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18215 conditions, 8375 events. 5391/8375 cut-off events. For 1502/1516 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 53188 event pairs, 3278 based on Foata normal form. 15/8251 useless extension candidates. Maximal degree in co-relation 18203. Up to 7279 conditions per place. [2024-06-27 17:53:53,613 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 53 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-27 17:53:53,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 329 flow [2024-06-27 17:53:53,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-06-27 17:53:53,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6898148148148148 [2024-06-27 17:53:53,615 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 141 flow. Second operand 4 states and 149 transitions. [2024-06-27 17:53:53,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 329 flow [2024-06-27 17:53:53,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:53:53,617 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 176 flow [2024-06-27 17:53:53,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-06-27 17:53:53,618 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-06-27 17:53:53,618 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 176 flow [2024-06-27 17:53:53,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:53:53,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:53,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:53,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:53:53,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:53,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash -253216549, now seen corresponding path program 1 times [2024-06-27 17:53:53,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:53,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433683542] [2024-06-27 17:53:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:53,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:53,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433683542] [2024-06-27 17:53:53,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433683542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:53,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:53,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:53:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93245850] [2024-06-27 17:53:53,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:53,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:53:53,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:53:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:53:53,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:53:53,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:53,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:53,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:53:53,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:54,321 INFO L124 PetriNetUnfolderBase]: 5334/8107 cut-off events. [2024-06-27 17:53:54,322 INFO L125 PetriNetUnfolderBase]: For 3601/3601 co-relation queries the response was YES. [2024-06-27 17:53:54,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19474 conditions, 8107 events. 5334/8107 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 50124 event pairs, 3030 based on Foata normal form. 3/8054 useless extension candidates. Maximal degree in co-relation 19460. Up to 7276 conditions per place. [2024-06-27 17:53:54,366 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 57 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-06-27 17:53:54,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 388 flow [2024-06-27 17:53:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2024-06-27 17:53:54,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-06-27 17:53:54,370 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 176 flow. Second operand 4 states and 146 transitions. [2024-06-27 17:53:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 388 flow [2024-06-27 17:53:54,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 366 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:54,376 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 228 flow [2024-06-27 17:53:54,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 17:53:54,377 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-06-27 17:53:54,377 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 228 flow [2024-06-27 17:53:54,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:54,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:54,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:54,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:53:54,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:54,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:54,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1472062714, now seen corresponding path program 1 times [2024-06-27 17:53:54,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:54,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518354628] [2024-06-27 17:53:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:54,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:54,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:54,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518354628] [2024-06-27 17:53:54,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518354628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:54,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:54,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:54,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833624093] [2024-06-27 17:53:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:54,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:54,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:54,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:54,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:53:54,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:54,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:54,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:53:54,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:55,086 INFO L124 PetriNetUnfolderBase]: 5319/7760 cut-off events. [2024-06-27 17:53:55,087 INFO L125 PetriNetUnfolderBase]: For 6018/6018 co-relation queries the response was YES. [2024-06-27 17:53:55,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21107 conditions, 7760 events. 5319/7760 cut-off events. For 6018/6018 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 46339 event pairs, 2358 based on Foata normal form. 6/7753 useless extension candidates. Maximal degree in co-relation 21091. Up to 7217 conditions per place. [2024-06-27 17:53:55,197 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 67 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-06-27 17:53:55,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 478 flow [2024-06-27 17:53:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-27 17:53:55,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:53:55,199 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 228 flow. Second operand 5 states and 180 transitions. [2024-06-27 17:53:55,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 478 flow [2024-06-27 17:53:55,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 474 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:53:55,205 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 280 flow [2024-06-27 17:53:55,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-27 17:53:55,207 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2024-06-27 17:53:55,207 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 280 flow [2024-06-27 17:53:55,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:53:55,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:55,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:55,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:53:55,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:55,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:55,208 INFO L85 PathProgramCache]: Analyzing trace with hash 694469408, now seen corresponding path program 1 times [2024-06-27 17:53:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:55,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205234349] [2024-06-27 17:53:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:55,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:53:55,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:55,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205234349] [2024-06-27 17:53:55,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205234349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:55,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:55,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078859490] [2024-06-27 17:53:55,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:55,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:55,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 17:53:55,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:55,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:55,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:56,089 INFO L124 PetriNetUnfolderBase]: 6856/9978 cut-off events. [2024-06-27 17:53:56,090 INFO L125 PetriNetUnfolderBase]: For 11714/11725 co-relation queries the response was YES. [2024-06-27 17:53:56,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28800 conditions, 9978 events. 6856/9978 cut-off events. For 11714/11725 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 60097 event pairs, 2516 based on Foata normal form. 15/9963 useless extension candidates. Maximal degree in co-relation 28781. Up to 9111 conditions per place. [2024-06-27 17:53:56,144 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 63 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-27 17:53:56,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 544 flow [2024-06-27 17:53:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-06-27 17:53:56,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6898148148148148 [2024-06-27 17:53:56,146 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 280 flow. Second operand 4 states and 149 transitions. [2024-06-27 17:53:56,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 544 flow [2024-06-27 17:53:56,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 514 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 17:53:56,154 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 350 flow [2024-06-27 17:53:56,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-27 17:53:56,155 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-06-27 17:53:56,155 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 350 flow [2024-06-27 17:53:56,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 17:53:56,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:56,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:56,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:53:56,156 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:56,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 707995328, now seen corresponding path program 2 times [2024-06-27 17:53:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081561636] [2024-06-27 17:53:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:56,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:56,242 INFO 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 17:53:56,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:56,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081561636] [2024-06-27 17:53:56,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081561636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:56,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:56,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:53:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118154910] [2024-06-27 17:53:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:56,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:53:56,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:53:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:53:56,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:56,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 350 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 17:53:56,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:56,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:56,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:56,941 INFO L124 PetriNetUnfolderBase]: 6847/10399 cut-off events. [2024-06-27 17:53:56,941 INFO L125 PetriNetUnfolderBase]: For 18696/18698 co-relation queries the response was YES. [2024-06-27 17:53:56,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32587 conditions, 10399 events. 6847/10399 cut-off events. For 18696/18698 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 65761 event pairs, 3457 based on Foata normal form. 3/10324 useless extension candidates. Maximal degree in co-relation 32567. Up to 9179 conditions per place. [2024-06-27 17:53:57,001 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 78 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-27 17:53:57,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 716 flow [2024-06-27 17:53:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:53:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:53:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-27 17:53:57,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:53:57,003 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 350 flow. Second operand 5 states and 180 transitions. [2024-06-27 17:53:57,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 716 flow [2024-06-27 17:53:57,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 648 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 17:53:57,025 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 463 flow [2024-06-27 17:53:57,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-27 17:53:57,026 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2024-06-27 17:53:57,026 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 463 flow [2024-06-27 17:53:57,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 17:53:57,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:57,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:53:57,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:57,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:57,027 INFO L85 PathProgramCache]: Analyzing trace with hash 667674738, now seen corresponding path program 1 times [2024-06-27 17:53:57,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:57,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663403543] [2024-06-27 17:53:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:57,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:57,106 INFO 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 17:53:57,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663403543] [2024-06-27 17:53:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663403543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:57,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:57,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:53:57,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225383638] [2024-06-27 17:53:57,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:57,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:53:57,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:53:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:53:57,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:53:57,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 463 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 17:53:57,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:57,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:53:57,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:57,719 INFO L124 PetriNetUnfolderBase]: 6580/9702 cut-off events. [2024-06-27 17:53:57,719 INFO L125 PetriNetUnfolderBase]: For 18465/18468 co-relation queries the response was YES. [2024-06-27 17:53:57,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31580 conditions, 9702 events. 6580/9702 cut-off events. For 18465/18468 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 59463 event pairs, 2639 based on Foata normal form. 5/9686 useless extension candidates. Maximal degree in co-relation 31557. Up to 8753 conditions per place. [2024-06-27 17:53:57,785 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 83 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-27 17:53:57,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 117 transitions, 821 flow [2024-06-27 17:53:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:53:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:53:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-06-27 17:53:57,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-27 17:53:57,787 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 463 flow. Second operand 4 states and 147 transitions. [2024-06-27 17:53:57,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 117 transitions, 821 flow [2024-06-27 17:53:57,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 785 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-27 17:53:57,803 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 568 flow [2024-06-27 17:53:57,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=568, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-06-27 17:53:57,803 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-06-27 17:53:57,803 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 568 flow [2024-06-27 17:53:57,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 17:53:57,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:57,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:57,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:53:57,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:57,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash -469255393, now seen corresponding path program 1 times [2024-06-27 17:53:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:57,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157971550] [2024-06-27 17:53:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:57,923 INFO 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 17:53:57,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:57,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157971550] [2024-06-27 17:53:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157971550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:57,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:57,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:57,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182161157] [2024-06-27 17:53:57,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:57,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:57,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:57,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:57,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:57,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:57,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 568 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:53:57,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:57,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:57,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:58,847 INFO L124 PetriNetUnfolderBase]: 7672/11765 cut-off events. [2024-06-27 17:53:58,847 INFO L125 PetriNetUnfolderBase]: For 35367/35375 co-relation queries the response was YES. [2024-06-27 17:53:58,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42147 conditions, 11765 events. 7672/11765 cut-off events. For 35367/35375 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75651 event pairs, 2418 based on Foata normal form. 34/11681 useless extension candidates. Maximal degree in co-relation 42120. Up to 9344 conditions per place. [2024-06-27 17:53:58,930 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 103 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-27 17:53:58,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 157 transitions, 1125 flow [2024-06-27 17:53:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:53:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:53:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 226 transitions. [2024-06-27 17:53:58,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2024-06-27 17:53:58,933 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 568 flow. Second operand 6 states and 226 transitions. [2024-06-27 17:53:58,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 157 transitions, 1125 flow [2024-06-27 17:53:58,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 157 transitions, 1111 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-27 17:53:58,962 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 761 flow [2024-06-27 17:53:58,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-06-27 17:53:58,962 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2024-06-27 17:53:58,963 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 761 flow [2024-06-27 17:53:58,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:53:58,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:53:58,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:53:58,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:53:58,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:53:58,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:53:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1772086379, now seen corresponding path program 2 times [2024-06-27 17:53:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:53:58,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812350935] [2024-06-27 17:53:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:53:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:53:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:53:59,075 INFO 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 17:53:59,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:53:59,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812350935] [2024-06-27 17:53:59,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812350935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:53:59,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:53:59,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:53:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090591088] [2024-06-27 17:53:59,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:53:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:53:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:53:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:53:59,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:53:59,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:53:59,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 761 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:53:59,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:53:59,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:53:59,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:53:59,959 INFO L124 PetriNetUnfolderBase]: 7550/10991 cut-off events. [2024-06-27 17:53:59,960 INFO L125 PetriNetUnfolderBase]: For 43056/43064 co-relation queries the response was YES. [2024-06-27 17:53:59,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43982 conditions, 10991 events. 7550/10991 cut-off events. For 43056/43064 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 66623 event pairs, 2187 based on Foata normal form. 52/11017 useless extension candidates. Maximal degree in co-relation 43951. Up to 9599 conditions per place. [2024-06-27 17:54:00,053 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 95 selfloop transitions, 33 changer transitions 0/143 dead transitions. [2024-06-27 17:54:00,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 143 transitions, 1145 flow [2024-06-27 17:54:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-06-27 17:54:00,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-27 17:54:00,055 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 761 flow. Second operand 5 states and 187 transitions. [2024-06-27 17:54:00,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 143 transitions, 1145 flow [2024-06-27 17:54:00,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 143 transitions, 1080 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:00,152 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 795 flow [2024-06-27 17:54:00,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=795, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-27 17:54:00,153 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 30 predicate places. [2024-06-27 17:54:00,153 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 795 flow [2024-06-27 17:54:00,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:54:00,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:00,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:00,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:54:00,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:00,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1778702911, now seen corresponding path program 3 times [2024-06-27 17:54:00,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:00,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955651999] [2024-06-27 17:54:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:00,263 INFO 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 17:54:00,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955651999] [2024-06-27 17:54:00,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955651999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:00,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:00,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:00,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242990530] [2024-06-27 17:54:00,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:00,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:00,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 795 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:54:00,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:00,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:00,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:01,246 INFO L124 PetriNetUnfolderBase]: 7665/11139 cut-off events. [2024-06-27 17:54:01,247 INFO L125 PetriNetUnfolderBase]: For 45078/45080 co-relation queries the response was YES. [2024-06-27 17:54:01,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45207 conditions, 11139 events. 7665/11139 cut-off events. For 45078/45080 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 67497 event pairs, 2551 based on Foata normal form. 24/11142 useless extension candidates. Maximal degree in co-relation 45174. Up to 10142 conditions per place. [2024-06-27 17:54:01,307 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 114 selfloop transitions, 23 changer transitions 0/152 dead transitions. [2024-06-27 17:54:01,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 152 transitions, 1220 flow [2024-06-27 17:54:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-06-27 17:54:01,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6635802469135802 [2024-06-27 17:54:01,308 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 795 flow. Second operand 6 states and 215 transitions. [2024-06-27 17:54:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 152 transitions, 1220 flow [2024-06-27 17:54:01,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1162 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:01,368 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 825 flow [2024-06-27 17:54:01,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=825, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-27 17:54:01,369 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 33 predicate places. [2024-06-27 17:54:01,369 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 825 flow [2024-06-27 17:54:01,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:54:01,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:01,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:01,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:54:01,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:01,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1780671299, now seen corresponding path program 1 times [2024-06-27 17:54:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:01,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538516994] [2024-06-27 17:54:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:01,460 INFO 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 17:54:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538516994] [2024-06-27 17:54:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538516994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:01,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698745973] [2024-06-27 17:54:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:01,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:01,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:01,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 825 flow. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:54:01,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:01,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:01,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:02,259 INFO L124 PetriNetUnfolderBase]: 7626/11340 cut-off events. [2024-06-27 17:54:02,259 INFO L125 PetriNetUnfolderBase]: For 52767/52769 co-relation queries the response was YES. [2024-06-27 17:54:02,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45983 conditions, 11340 events. 7626/11340 cut-off events. For 52767/52769 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 70662 event pairs, 2941 based on Foata normal form. 18/11279 useless extension candidates. Maximal degree in co-relation 45949. Up to 9653 conditions per place. [2024-06-27 17:54:02,333 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 114 selfloop transitions, 29 changer transitions 0/158 dead transitions. [2024-06-27 17:54:02,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 1279 flow [2024-06-27 17:54:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-06-27 17:54:02,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6697530864197531 [2024-06-27 17:54:02,334 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 825 flow. Second operand 6 states and 217 transitions. [2024-06-27 17:54:02,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 1279 flow [2024-06-27 17:54:02,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 158 transitions, 1221 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:02,413 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 879 flow [2024-06-27 17:54:02,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=879, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-06-27 17:54:02,414 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 35 predicate places. [2024-06-27 17:54:02,414 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 879 flow [2024-06-27 17:54:02,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 17:54:02,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:02,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:02,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:54:02,415 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:02,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -991755044, now seen corresponding path program 1 times [2024-06-27 17:54:02,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:02,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072432698] [2024-06-27 17:54:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:02,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:02,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:02,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072432698] [2024-06-27 17:54:02,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072432698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:02,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:02,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745333888] [2024-06-27 17:54:02,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:02,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:02,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:02,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:02,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 879 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 17:54:02,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:02,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:02,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:03,211 INFO L124 PetriNetUnfolderBase]: 7245/10656 cut-off events. [2024-06-27 17:54:03,211 INFO L125 PetriNetUnfolderBase]: For 57869/57886 co-relation queries the response was YES. [2024-06-27 17:54:03,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45463 conditions, 10656 events. 7245/10656 cut-off events. For 57869/57886 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 65910 event pairs, 2465 based on Foata normal form. 8/10654 useless extension candidates. Maximal degree in co-relation 45427. Up to 9739 conditions per place. [2024-06-27 17:54:03,291 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 106 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2024-06-27 17:54:03,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 147 transitions, 1307 flow [2024-06-27 17:54:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-27 17:54:03,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:54:03,298 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 879 flow. Second operand 5 states and 177 transitions. [2024-06-27 17:54:03,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 147 transitions, 1307 flow [2024-06-27 17:54:03,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1244 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:03,390 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1018 flow [2024-06-27 17:54:03,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1018, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2024-06-27 17:54:03,391 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 39 predicate places. [2024-06-27 17:54:03,391 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1018 flow [2024-06-27 17:54:03,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 17:54:03,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:03,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:03,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:54:03,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:03,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1806543527, now seen corresponding path program 1 times [2024-06-27 17:54:03,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:03,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503150482] [2024-06-27 17:54:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:03,492 INFO 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 17:54:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503150482] [2024-06-27 17:54:03,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503150482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:03,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:03,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118116267] [2024-06-27 17:54:03,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:03,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:03,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 1018 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:03,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:03,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:03,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:04,311 INFO L124 PetriNetUnfolderBase]: 7472/11032 cut-off events. [2024-06-27 17:54:04,311 INFO L125 PetriNetUnfolderBase]: For 63871/63880 co-relation queries the response was YES. [2024-06-27 17:54:04,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47866 conditions, 11032 events. 7472/11032 cut-off events. For 63871/63880 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 68670 event pairs, 2484 based on Foata normal form. 12/11012 useless extension candidates. Maximal degree in co-relation 47827. Up to 9800 conditions per place. [2024-06-27 17:54:04,392 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 95 selfloop transitions, 36 changer transitions 0/154 dead transitions. [2024-06-27 17:54:04,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 154 transitions, 1459 flow [2024-06-27 17:54:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-27 17:54:04,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:54:04,393 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 1018 flow. Second operand 5 states and 177 transitions. [2024-06-27 17:54:04,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 154 transitions, 1459 flow [2024-06-27 17:54:04,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1413 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:04,501 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1182 flow [2024-06-27 17:54:04,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1182, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-27 17:54:04,502 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2024-06-27 17:54:04,502 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1182 flow [2024-06-27 17:54:04,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:04,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:04,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:04,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:54:04,503 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:04,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1806157577, now seen corresponding path program 2 times [2024-06-27 17:54:04,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:04,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849477784] [2024-06-27 17:54:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:04,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:04,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849477784] [2024-06-27 17:54:04,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849477784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:04,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:04,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624582221] [2024-06-27 17:54:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:04,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:04,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:04,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:04,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:04,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1182 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:04,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:04,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:04,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:05,419 INFO L124 PetriNetUnfolderBase]: 7505/11324 cut-off events. [2024-06-27 17:54:05,420 INFO L125 PetriNetUnfolderBase]: For 80419/80479 co-relation queries the response was YES. [2024-06-27 17:54:05,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51872 conditions, 11324 events. 7505/11324 cut-off events. For 80419/80479 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 72438 event pairs, 3339 based on Foata normal form. 62/11294 useless extension candidates. Maximal degree in co-relation 51829. Up to 9764 conditions per place. [2024-06-27 17:54:05,509 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 104 selfloop transitions, 45 changer transitions 0/172 dead transitions. [2024-06-27 17:54:05,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 172 transitions, 1742 flow [2024-06-27 17:54:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-06-27 17:54:05,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 17:54:05,511 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1182 flow. Second operand 5 states and 181 transitions. [2024-06-27 17:54:05,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 172 transitions, 1742 flow [2024-06-27 17:54:05,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 172 transitions, 1692 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:05,647 INFO L231 Difference]: Finished difference. Result has 110 places, 145 transitions, 1413 flow [2024-06-27 17:54:05,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1413, PETRI_PLACES=110, PETRI_TRANSITIONS=145} [2024-06-27 17:54:05,648 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-06-27 17:54:05,648 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 145 transitions, 1413 flow [2024-06-27 17:54:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:05,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:05,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:05,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:54:05,649 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:05,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1036114949, now seen corresponding path program 1 times [2024-06-27 17:54:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:05,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639344391] [2024-06-27 17:54:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:05,731 INFO 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 17:54:05,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:05,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639344391] [2024-06-27 17:54:05,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639344391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:05,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:05,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:05,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266810553] [2024-06-27 17:54:05,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:05,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:05,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:05,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:05,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 145 transitions, 1413 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:54:05,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:05,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:05,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:06,674 INFO L124 PetriNetUnfolderBase]: 7950/11667 cut-off events. [2024-06-27 17:54:06,674 INFO L125 PetriNetUnfolderBase]: For 90963/90963 co-relation queries the response was YES. [2024-06-27 17:54:06,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57856 conditions, 11667 events. 7950/11667 cut-off events. For 90963/90963 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 71548 event pairs, 2482 based on Foata normal form. 3/11656 useless extension candidates. Maximal degree in co-relation 57810. Up to 10603 conditions per place. [2024-06-27 17:54:06,756 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 165 selfloop transitions, 32 changer transitions 0/212 dead transitions. [2024-06-27 17:54:06,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 212 transitions, 2323 flow [2024-06-27 17:54:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-06-27 17:54:06,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-06-27 17:54:06,758 INFO L175 Difference]: Start difference. First operand has 110 places, 145 transitions, 1413 flow. Second operand 6 states and 214 transitions. [2024-06-27 17:54:06,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 212 transitions, 2323 flow [2024-06-27 17:54:06,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 212 transitions, 2253 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:06,886 INFO L231 Difference]: Finished difference. Result has 118 places, 165 transitions, 1669 flow [2024-06-27 17:54:06,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1669, PETRI_PLACES=118, PETRI_TRANSITIONS=165} [2024-06-27 17:54:06,887 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 58 predicate places. [2024-06-27 17:54:06,887 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 165 transitions, 1669 flow [2024-06-27 17:54:06,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:54:06,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:06,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:06,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:54:06,887 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:06,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1806151625, now seen corresponding path program 2 times [2024-06-27 17:54:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:06,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147179597] [2024-06-27 17:54:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:06,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:06,959 INFO 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 17:54:06,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:06,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147179597] [2024-06-27 17:54:06,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147179597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:06,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:06,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:06,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030743665] [2024-06-27 17:54:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:06,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:06,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:06,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:06,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 165 transitions, 1669 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:54:06,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:06,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:06,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:07,971 INFO L124 PetriNetUnfolderBase]: 8011/11822 cut-off events. [2024-06-27 17:54:07,971 INFO L125 PetriNetUnfolderBase]: For 99119/99131 co-relation queries the response was YES. [2024-06-27 17:54:08,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59483 conditions, 11822 events. 8011/11822 cut-off events. For 99119/99131 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 73251 event pairs, 3293 based on Foata normal form. 11/11807 useless extension candidates. Maximal degree in co-relation 59432. Up to 10719 conditions per place. [2024-06-27 17:54:08,067 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 176 selfloop transitions, 35 changer transitions 0/226 dead transitions. [2024-06-27 17:54:08,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 226 transitions, 2523 flow [2024-06-27 17:54:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 244 transitions. [2024-06-27 17:54:08,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6455026455026455 [2024-06-27 17:54:08,069 INFO L175 Difference]: Start difference. First operand has 118 places, 165 transitions, 1669 flow. Second operand 7 states and 244 transitions. [2024-06-27 17:54:08,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 226 transitions, 2523 flow [2024-06-27 17:54:08,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 226 transitions, 2429 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:08,252 INFO L231 Difference]: Finished difference. Result has 125 places, 177 transitions, 1824 flow [2024-06-27 17:54:08,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1824, PETRI_PLACES=125, PETRI_TRANSITIONS=177} [2024-06-27 17:54:08,253 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2024-06-27 17:54:08,253 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 177 transitions, 1824 flow [2024-06-27 17:54:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:54:08,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:08,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:08,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:54:08,254 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:08,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1806359015, now seen corresponding path program 3 times [2024-06-27 17:54:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:08,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138468101] [2024-06-27 17:54:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:08,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:08,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:08,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138468101] [2024-06-27 17:54:08,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138468101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:08,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:08,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986805982] [2024-06-27 17:54:08,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:08,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:08,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:08,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:08,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 177 transitions, 1824 flow. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:54:08,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:08,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:08,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:09,349 INFO L124 PetriNetUnfolderBase]: 8003/11769 cut-off events. [2024-06-27 17:54:09,349 INFO L125 PetriNetUnfolderBase]: For 109921/109921 co-relation queries the response was YES. [2024-06-27 17:54:09,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60693 conditions, 11769 events. 8003/11769 cut-off events. For 109921/109921 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 72380 event pairs, 2546 based on Foata normal form. 3/11754 useless extension candidates. Maximal degree in co-relation 60639. Up to 10713 conditions per place. [2024-06-27 17:54:09,441 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 166 selfloop transitions, 31 changer transitions 0/212 dead transitions. [2024-06-27 17:54:09,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2422 flow [2024-06-27 17:54:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-27 17:54:09,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:54:09,443 INFO L175 Difference]: Start difference. First operand has 125 places, 177 transitions, 1824 flow. Second operand 5 states and 180 transitions. [2024-06-27 17:54:09,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2422 flow [2024-06-27 17:54:09,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2320 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:09,634 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 1795 flow [2024-06-27 17:54:09,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1795, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-06-27 17:54:09,635 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-06-27 17:54:09,635 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 1795 flow [2024-06-27 17:54:09,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 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 17:54:09,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:09,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:09,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:54:09,635 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:09,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1806143689, now seen corresponding path program 1 times [2024-06-27 17:54:09,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:09,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744451399] [2024-06-27 17:54:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:09,714 INFO 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 17:54:09,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:09,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744451399] [2024-06-27 17:54:09,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744451399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:09,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:09,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:09,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228647533] [2024-06-27 17:54:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:09,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:09,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:09,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:09,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:09,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 1795 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:09,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:09,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:09,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:10,774 INFO L124 PetriNetUnfolderBase]: 7741/11710 cut-off events. [2024-06-27 17:54:10,774 INFO L125 PetriNetUnfolderBase]: For 113952/113981 co-relation queries the response was YES. [2024-06-27 17:54:10,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59382 conditions, 11710 events. 7741/11710 cut-off events. For 113952/113981 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 75268 event pairs, 3324 based on Foata normal form. 18/11634 useless extension candidates. Maximal degree in co-relation 59326. Up to 10208 conditions per place. [2024-06-27 17:54:10,884 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 172 selfloop transitions, 18 changer transitions 0/213 dead transitions. [2024-06-27 17:54:10,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 213 transitions, 2383 flow [2024-06-27 17:54:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-06-27 17:54:10,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:54:10,885 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 1795 flow. Second operand 5 states and 180 transitions. [2024-06-27 17:54:10,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 213 transitions, 2383 flow [2024-06-27 17:54:11,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2321 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:11,133 INFO L231 Difference]: Finished difference. Result has 128 places, 180 transitions, 1828 flow [2024-06-27 17:54:11,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1828, PETRI_PLACES=128, PETRI_TRANSITIONS=180} [2024-06-27 17:54:11,134 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2024-06-27 17:54:11,134 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 180 transitions, 1828 flow [2024-06-27 17:54:11,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:11,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:11,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:11,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:54:11,134 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:11,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1847895330, now seen corresponding path program 1 times [2024-06-27 17:54:11,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:11,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117133719] [2024-06-27 17:54:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:11,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:11,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117133719] [2024-06-27 17:54:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117133719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:11,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:11,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:54:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894817853] [2024-06-27 17:54:11,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:54:11,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:54:11,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:54:11,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:54:11,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 180 transitions, 1828 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 17:54:11,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:11,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:54:11,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:12,258 INFO L124 PetriNetUnfolderBase]: 7290/10818 cut-off events. [2024-06-27 17:54:12,259 INFO L125 PetriNetUnfolderBase]: For 129506/129755 co-relation queries the response was YES. [2024-06-27 17:54:12,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58165 conditions, 10818 events. 7290/10818 cut-off events. For 129506/129755 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 68475 event pairs, 2291 based on Foata normal form. 25/10619 useless extension candidates. Maximal degree in co-relation 58108. Up to 9546 conditions per place. [2024-06-27 17:54:12,366 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 144 selfloop transitions, 16 changer transitions 0/197 dead transitions. [2024-06-27 17:54:12,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 197 transitions, 2212 flow [2024-06-27 17:54:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:54:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:54:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-06-27 17:54:12,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-27 17:54:12,368 INFO L175 Difference]: Start difference. First operand has 128 places, 180 transitions, 1828 flow. Second operand 4 states and 143 transitions. [2024-06-27 17:54:12,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 197 transitions, 2212 flow [2024-06-27 17:54:12,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 197 transitions, 2158 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:12,654 INFO L231 Difference]: Finished difference. Result has 131 places, 182 transitions, 1860 flow [2024-06-27 17:54:12,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1860, PETRI_PLACES=131, PETRI_TRANSITIONS=182} [2024-06-27 17:54:12,655 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 71 predicate places. [2024-06-27 17:54:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 182 transitions, 1860 flow [2024-06-27 17:54:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 17:54:12,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:12,655 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 17:54:12,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:54:12,655 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 403343739, now seen corresponding path program 1 times [2024-06-27 17:54:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112338594] [2024-06-27 17:54:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:12,757 INFO 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 17:54:12,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:12,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112338594] [2024-06-27 17:54:12,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112338594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:12,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:12,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858862365] [2024-06-27 17:54:12,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:12,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:12,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:12,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 182 transitions, 1860 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:12,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:12,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:12,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:14,028 INFO L124 PetriNetUnfolderBase]: 7886/11619 cut-off events. [2024-06-27 17:54:14,028 INFO L125 PetriNetUnfolderBase]: For 135126/135186 co-relation queries the response was YES. [2024-06-27 17:54:14,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62098 conditions, 11619 events. 7886/11619 cut-off events. For 135126/135186 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 72270 event pairs, 2749 based on Foata normal form. 39/11611 useless extension candidates. Maximal degree in co-relation 62038. Up to 10098 conditions per place. [2024-06-27 17:54:14,145 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 164 selfloop transitions, 41 changer transitions 0/230 dead transitions. [2024-06-27 17:54:14,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 230 transitions, 2580 flow [2024-06-27 17:54:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-06-27 17:54:14,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-06-27 17:54:14,147 INFO L175 Difference]: Start difference. First operand has 131 places, 182 transitions, 1860 flow. Second operand 6 states and 214 transitions. [2024-06-27 17:54:14,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 230 transitions, 2580 flow [2024-06-27 17:54:14,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 230 transitions, 2562 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 17:54:14,458 INFO L231 Difference]: Finished difference. Result has 137 places, 190 transitions, 2105 flow [2024-06-27 17:54:14,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2105, PETRI_PLACES=137, PETRI_TRANSITIONS=190} [2024-06-27 17:54:14,459 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 77 predicate places. [2024-06-27 17:54:14,459 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 190 transitions, 2105 flow [2024-06-27 17:54:14,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:14,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:14,459 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 17:54:14,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:54:14,460 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:14,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:14,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2054795301, now seen corresponding path program 2 times [2024-06-27 17:54:14,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:14,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073112506] [2024-06-27 17:54:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:14,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:14,533 INFO 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 17:54:14,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:14,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073112506] [2024-06-27 17:54:14,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073112506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:14,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:14,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:54:14,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019635981] [2024-06-27 17:54:14,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:14,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:54:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:54:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:54:14,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:14,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 190 transitions, 2105 flow. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:14,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:14,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:14,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:15,612 INFO L124 PetriNetUnfolderBase]: 7854/11560 cut-off events. [2024-06-27 17:54:15,612 INFO L125 PetriNetUnfolderBase]: For 150138/150152 co-relation queries the response was YES. [2024-06-27 17:54:15,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63969 conditions, 11560 events. 7854/11560 cut-off events. For 150138/150152 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 71933 event pairs, 2488 based on Foata normal form. 17/11564 useless extension candidates. Maximal degree in co-relation 63906. Up to 10276 conditions per place. [2024-06-27 17:54:15,720 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 165 selfloop transitions, 34 changer transitions 0/224 dead transitions. [2024-06-27 17:54:15,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 224 transitions, 2585 flow [2024-06-27 17:54:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-06-27 17:54:15,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-27 17:54:15,722 INFO L175 Difference]: Start difference. First operand has 137 places, 190 transitions, 2105 flow. Second operand 6 states and 208 transitions. [2024-06-27 17:54:15,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 224 transitions, 2585 flow [2024-06-27 17:54:16,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 224 transitions, 2419 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:16,142 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 2016 flow [2024-06-27 17:54:16,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2016, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-27 17:54:16,143 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 80 predicate places. [2024-06-27 17:54:16,143 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 2016 flow [2024-06-27 17:54:16,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 17:54:16,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:16,143 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 17:54:16,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:54:16,144 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:16,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2051155509, now seen corresponding path program 1 times [2024-06-27 17:54:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:16,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191694539] [2024-06-27 17:54:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:16,236 INFO 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 17:54:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:16,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191694539] [2024-06-27 17:54:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191694539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:16,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:16,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:16,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332991727] [2024-06-27 17:54:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:16,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:16,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:16,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 2016 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:16,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:16,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:16,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:17,323 INFO L124 PetriNetUnfolderBase]: 8145/11857 cut-off events. [2024-06-27 17:54:17,324 INFO L125 PetriNetUnfolderBase]: For 152752/152763 co-relation queries the response was YES. [2024-06-27 17:54:17,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65028 conditions, 11857 events. 8145/11857 cut-off events. For 152752/152763 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 72398 event pairs, 2386 based on Foata normal form. 8/11847 useless extension candidates. Maximal degree in co-relation 64964. Up to 10821 conditions per place. [2024-06-27 17:54:17,428 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 160 selfloop transitions, 48 changer transitions 0/223 dead transitions. [2024-06-27 17:54:17,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 223 transitions, 2582 flow [2024-06-27 17:54:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-06-27 17:54:17,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-27 17:54:17,429 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 2016 flow. Second operand 5 states and 179 transitions. [2024-06-27 17:54:17,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 223 transitions, 2582 flow [2024-06-27 17:54:17,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 223 transitions, 2509 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:17,734 INFO L231 Difference]: Finished difference. Result has 141 places, 194 transitions, 2136 flow [2024-06-27 17:54:17,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2136, PETRI_PLACES=141, PETRI_TRANSITIONS=194} [2024-06-27 17:54:17,734 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 81 predicate places. [2024-06-27 17:54:17,735 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 194 transitions, 2136 flow [2024-06-27 17:54:17,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:17,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:17,735 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 17:54:17,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:54:17,735 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:17,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1008472451, now seen corresponding path program 2 times [2024-06-27 17:54:17,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:17,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281886067] [2024-06-27 17:54:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:17,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:17,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281886067] [2024-06-27 17:54:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281886067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:17,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538765883] [2024-06-27 17:54:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:17,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:17,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:17,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 194 transitions, 2136 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:17,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:17,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:17,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:18,920 INFO L124 PetriNetUnfolderBase]: 8169/12029 cut-off events. [2024-06-27 17:54:18,920 INFO L125 PetriNetUnfolderBase]: For 173004/173015 co-relation queries the response was YES. [2024-06-27 17:54:18,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67682 conditions, 12029 events. 8169/12029 cut-off events. For 173004/173015 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 74917 event pairs, 2864 based on Foata normal form. 8/11986 useless extension candidates. Maximal degree in co-relation 67617. Up to 10798 conditions per place. [2024-06-27 17:54:19,030 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 170 selfloop transitions, 57 changer transitions 0/242 dead transitions. [2024-06-27 17:54:19,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2932 flow [2024-06-27 17:54:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-06-27 17:54:19,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-27 17:54:19,031 INFO L175 Difference]: Start difference. First operand has 141 places, 194 transitions, 2136 flow. Second operand 6 states and 213 transitions. [2024-06-27 17:54:19,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2932 flow [2024-06-27 17:54:19,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 2799 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:19,403 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2294 flow [2024-06-27 17:54:19,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2294, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-27 17:54:19,404 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 84 predicate places. [2024-06-27 17:54:19,404 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2294 flow [2024-06-27 17:54:19,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:19,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:19,404 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 17:54:19,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:54:19,404 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:19,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1008741221, now seen corresponding path program 3 times [2024-06-27 17:54:19,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:19,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637994274] [2024-06-27 17:54:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:19,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:19,490 INFO 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 17:54:19,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637994274] [2024-06-27 17:54:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637994274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:19,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:19,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:19,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647025059] [2024-06-27 17:54:19,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:19,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:19,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:19,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2294 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:19,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:19,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:19,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:20,742 INFO L124 PetriNetUnfolderBase]: 8193/12005 cut-off events. [2024-06-27 17:54:20,743 INFO L125 PetriNetUnfolderBase]: For 192065/192076 co-relation queries the response was YES. [2024-06-27 17:54:20,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70061 conditions, 12005 events. 8193/12005 cut-off events. For 192065/192076 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 74179 event pairs, 2386 based on Foata normal form. 8/11995 useless extension candidates. Maximal degree in co-relation 69995. Up to 10823 conditions per place. [2024-06-27 17:54:20,837 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 166 selfloop transitions, 62 changer transitions 0/243 dead transitions. [2024-06-27 17:54:20,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 243 transitions, 3016 flow [2024-06-27 17:54:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-06-27 17:54:20,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6512345679012346 [2024-06-27 17:54:20,845 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2294 flow. Second operand 6 states and 211 transitions. [2024-06-27 17:54:20,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 243 transitions, 3016 flow [2024-06-27 17:54:21,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 243 transitions, 2853 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:21,212 INFO L231 Difference]: Finished difference. Result has 148 places, 206 transitions, 2352 flow [2024-06-27 17:54:21,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2352, PETRI_PLACES=148, PETRI_TRANSITIONS=206} [2024-06-27 17:54:21,212 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2024-06-27 17:54:21,212 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 206 transitions, 2352 flow [2024-06-27 17:54:21,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:21,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:21,213 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 17:54:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:54:21,213 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:21,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:21,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1008741562, now seen corresponding path program 1 times [2024-06-27 17:54:21,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:21,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430485004] [2024-06-27 17:54:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430485004] [2024-06-27 17:54:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430485004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:21,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:21,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838248848] [2024-06-27 17:54:21,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:21,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:21,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:21,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:21,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 206 transitions, 2352 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:21,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:21,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:21,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:22,572 INFO L124 PetriNetUnfolderBase]: 8361/12437 cut-off events. [2024-06-27 17:54:22,572 INFO L125 PetriNetUnfolderBase]: For 202702/202718 co-relation queries the response was YES. [2024-06-27 17:54:22,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72353 conditions, 12437 events. 8361/12437 cut-off events. For 202702/202718 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 78246 event pairs, 2543 based on Foata normal form. 15/12434 useless extension candidates. Maximal degree in co-relation 72285. Up to 10855 conditions per place. [2024-06-27 17:54:22,695 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 188 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2024-06-27 17:54:22,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 287 transitions, 3595 flow [2024-06-27 17:54:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:54:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:54:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 309 transitions. [2024-06-27 17:54:22,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-27 17:54:22,696 INFO L175 Difference]: Start difference. First operand has 148 places, 206 transitions, 2352 flow. Second operand 9 states and 309 transitions. [2024-06-27 17:54:22,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 287 transitions, 3595 flow [2024-06-27 17:54:23,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 287 transitions, 3456 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:23,217 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2780 flow [2024-06-27 17:54:23,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2780, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-27 17:54:23,217 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 97 predicate places. [2024-06-27 17:54:23,217 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2780 flow [2024-06-27 17:54:23,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:23,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:23,217 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 17:54:23,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:54:23,218 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:23,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash -97428346, now seen corresponding path program 2 times [2024-06-27 17:54:23,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:23,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696975527] [2024-06-27 17:54:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:23,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:23,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696975527] [2024-06-27 17:54:23,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696975527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:23,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:23,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:23,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338818328] [2024-06-27 17:54:23,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:23,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:23,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:23,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:23,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:23,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2780 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:23,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:23,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:23,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:24,650 INFO L124 PetriNetUnfolderBase]: 8675/12826 cut-off events. [2024-06-27 17:54:24,650 INFO L125 PetriNetUnfolderBase]: For 238048/238059 co-relation queries the response was YES. [2024-06-27 17:54:24,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80101 conditions, 12826 events. 8675/12826 cut-off events. For 238048/238059 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 80292 event pairs, 2453 based on Foata normal form. 12/12818 useless extension candidates. Maximal degree in co-relation 80029. Up to 11140 conditions per place. [2024-06-27 17:54:24,777 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 189 selfloop transitions, 92 changer transitions 0/296 dead transitions. [2024-06-27 17:54:24,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 296 transitions, 4086 flow [2024-06-27 17:54:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-06-27 17:54:24,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2024-06-27 17:54:24,778 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2780 flow. Second operand 6 states and 220 transitions. [2024-06-27 17:54:24,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 296 transitions, 4086 flow [2024-06-27 17:54:25,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 296 transitions, 3915 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:25,574 INFO L231 Difference]: Finished difference. Result has 162 places, 256 transitions, 3336 flow [2024-06-27 17:54:25,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2646, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3336, PETRI_PLACES=162, PETRI_TRANSITIONS=256} [2024-06-27 17:54:25,575 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 102 predicate places. [2024-06-27 17:54:25,575 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 256 transitions, 3336 flow [2024-06-27 17:54:25,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:25,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:25,575 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 17:54:25,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:54:25,576 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:25,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1814136101, now seen corresponding path program 4 times [2024-06-27 17:54:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:25,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086532891] [2024-06-27 17:54:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:25,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:25,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086532891] [2024-06-27 17:54:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086532891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:25,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575600004] [2024-06-27 17:54:25,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:25,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:25,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:25,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:25,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:25,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 256 transitions, 3336 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:25,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:25,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:25,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:27,003 INFO L124 PetriNetUnfolderBase]: 8668/12700 cut-off events. [2024-06-27 17:54:27,003 INFO L125 PetriNetUnfolderBase]: For 269007/269018 co-relation queries the response was YES. [2024-06-27 17:54:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84117 conditions, 12700 events. 8668/12700 cut-off events. For 269007/269018 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 78964 event pairs, 2372 based on Foata normal form. 8/12690 useless extension candidates. Maximal degree in co-relation 84041. Up to 11473 conditions per place. [2024-06-27 17:54:27,135 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 219 selfloop transitions, 52 changer transitions 0/286 dead transitions. [2024-06-27 17:54:27,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 286 transitions, 3952 flow [2024-06-27 17:54:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-06-27 17:54:27,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-27 17:54:27,136 INFO L175 Difference]: Start difference. First operand has 162 places, 256 transitions, 3336 flow. Second operand 5 states and 181 transitions. [2024-06-27 17:54:27,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 286 transitions, 3952 flow [2024-06-27 17:54:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 286 transitions, 3746 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:28,140 INFO L231 Difference]: Finished difference. Result has 164 places, 256 transitions, 3250 flow [2024-06-27 17:54:28,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3250, PETRI_PLACES=164, PETRI_TRANSITIONS=256} [2024-06-27 17:54:28,140 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-06-27 17:54:28,140 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 256 transitions, 3250 flow [2024-06-27 17:54:28,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:28,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:28,141 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 17:54:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:54:28,141 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:28,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash -117776746, now seen corresponding path program 3 times [2024-06-27 17:54:28,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233346961] [2024-06-27 17:54:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:28,234 INFO 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 17:54:28,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:28,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233346961] [2024-06-27 17:54:28,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233346961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:28,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:28,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:28,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892616635] [2024-06-27 17:54:28,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:28,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:28,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:28,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 256 transitions, 3250 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:28,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:28,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:29,655 INFO L124 PetriNetUnfolderBase]: 8690/12854 cut-off events. [2024-06-27 17:54:29,655 INFO L125 PetriNetUnfolderBase]: For 263558/263569 co-relation queries the response was YES. [2024-06-27 17:54:29,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83685 conditions, 12854 events. 8690/12854 cut-off events. For 263558/263569 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 80747 event pairs, 2433 based on Foata normal form. 12/12840 useless extension candidates. Maximal degree in co-relation 83608. Up to 11159 conditions per place. [2024-06-27 17:54:29,967 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 192 selfloop transitions, 106 changer transitions 0/313 dead transitions. [2024-06-27 17:54:29,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 313 transitions, 4261 flow [2024-06-27 17:54:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-06-27 17:54:29,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2024-06-27 17:54:29,969 INFO L175 Difference]: Start difference. First operand has 164 places, 256 transitions, 3250 flow. Second operand 8 states and 281 transitions. [2024-06-27 17:54:29,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 313 transitions, 4261 flow [2024-06-27 17:54:30,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 313 transitions, 4098 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:30,569 INFO L231 Difference]: Finished difference. Result has 167 places, 265 transitions, 3478 flow [2024-06-27 17:54:30,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3099, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3478, PETRI_PLACES=167, PETRI_TRANSITIONS=265} [2024-06-27 17:54:30,569 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 107 predicate places. [2024-06-27 17:54:30,569 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 265 transitions, 3478 flow [2024-06-27 17:54:30,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:30,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:30,570 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 17:54:30,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:54:30,570 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:30,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:30,570 INFO L85 PathProgramCache]: Analyzing trace with hash -117768810, now seen corresponding path program 1 times [2024-06-27 17:54:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:30,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144636777] [2024-06-27 17:54:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:30,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144636777] [2024-06-27 17:54:30,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144636777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:30,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:30,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153151716] [2024-06-27 17:54:30,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:30,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:30,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:30,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 265 transitions, 3478 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:54:30,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:30,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:30,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:32,081 INFO L124 PetriNetUnfolderBase]: 8989/13485 cut-off events. [2024-06-27 17:54:32,081 INFO L125 PetriNetUnfolderBase]: For 289710/289856 co-relation queries the response was YES. [2024-06-27 17:54:32,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86646 conditions, 13485 events. 8989/13485 cut-off events. For 289710/289856 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 87555 event pairs, 3294 based on Foata normal form. 130/13515 useless extension candidates. Maximal degree in co-relation 86568. Up to 10911 conditions per place. [2024-06-27 17:54:32,218 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 219 selfloop transitions, 49 changer transitions 0/302 dead transitions. [2024-06-27 17:54:32,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 302 transitions, 4248 flow [2024-06-27 17:54:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:32,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-06-27 17:54:32,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-27 17:54:32,220 INFO L175 Difference]: Start difference. First operand has 167 places, 265 transitions, 3478 flow. Second operand 6 states and 213 transitions. [2024-06-27 17:54:32,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 302 transitions, 4248 flow [2024-06-27 17:54:33,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 302 transitions, 3958 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 17:54:33,029 INFO L231 Difference]: Finished difference. Result has 166 places, 267 transitions, 3360 flow [2024-06-27 17:54:33,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3360, PETRI_PLACES=166, PETRI_TRANSITIONS=267} [2024-06-27 17:54:33,030 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 106 predicate places. [2024-06-27 17:54:33,030 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 267 transitions, 3360 flow [2024-06-27 17:54:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:54:33,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:33,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:54:33,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:54:33,031 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:33,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash -760215777, now seen corresponding path program 1 times [2024-06-27 17:54:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:33,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971470390] [2024-06-27 17:54:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:33,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:33,090 INFO 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 17:54:33,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971470390] [2024-06-27 17:54:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971470390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:33,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:33,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:33,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198184269] [2024-06-27 17:54:33,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:33,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:33,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:54:33,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 267 transitions, 3360 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 17:54:33,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:33,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:54:33,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:34,624 INFO L124 PetriNetUnfolderBase]: 8481/12897 cut-off events. [2024-06-27 17:54:34,624 INFO L125 PetriNetUnfolderBase]: For 295831/296498 co-relation queries the response was YES. [2024-06-27 17:54:34,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84184 conditions, 12897 events. 8481/12897 cut-off events. For 295831/296498 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 85997 event pairs, 3184 based on Foata normal form. 174/12785 useless extension candidates. Maximal degree in co-relation 84106. Up to 10797 conditions per place. [2024-06-27 17:54:34,743 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 192 selfloop transitions, 44 changer transitions 0/288 dead transitions. [2024-06-27 17:54:34,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 288 transitions, 3882 flow [2024-06-27 17:54:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:54:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:54:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-27 17:54:34,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:54:34,744 INFO L175 Difference]: Start difference. First operand has 166 places, 267 transitions, 3360 flow. Second operand 5 states and 177 transitions. [2024-06-27 17:54:34,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 288 transitions, 3882 flow [2024-06-27 17:54:35,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 288 transitions, 3754 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:35,230 INFO L231 Difference]: Finished difference. Result has 167 places, 267 transitions, 3343 flow [2024-06-27 17:54:35,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3343, PETRI_PLACES=167, PETRI_TRANSITIONS=267} [2024-06-27 17:54:35,230 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 107 predicate places. [2024-06-27 17:54:35,230 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 267 transitions, 3343 flow [2024-06-27 17:54:35,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 17:54:35,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:35,231 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 17:54:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:54:35,231 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:35,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash -292538310, now seen corresponding path program 4 times [2024-06-27 17:54:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:35,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846890182] [2024-06-27 17:54:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846890182] [2024-06-27 17:54:35,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846890182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:35,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:35,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472799615] [2024-06-27 17:54:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:35,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:35,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:35,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 267 transitions, 3343 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:35,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:35,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:35,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:36,770 INFO L124 PetriNetUnfolderBase]: 9322/13655 cut-off events. [2024-06-27 17:54:36,770 INFO L125 PetriNetUnfolderBase]: For 280348/280355 co-relation queries the response was YES. [2024-06-27 17:54:36,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89139 conditions, 13655 events. 9322/13655 cut-off events. For 280348/280355 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 85511 event pairs, 2515 based on Foata normal form. 9/13638 useless extension candidates. Maximal degree in co-relation 89060. Up to 11838 conditions per place. [2024-06-27 17:54:36,914 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 221 selfloop transitions, 114 changer transitions 0/350 dead transitions. [2024-06-27 17:54:36,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 350 transitions, 4959 flow [2024-06-27 17:54:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 250 transitions. [2024-06-27 17:54:36,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6613756613756614 [2024-06-27 17:54:36,916 INFO L175 Difference]: Start difference. First operand has 167 places, 267 transitions, 3343 flow. Second operand 7 states and 250 transitions. [2024-06-27 17:54:36,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 350 transitions, 4959 flow [2024-06-27 17:54:37,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 350 transitions, 4849 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:54:37,677 INFO L231 Difference]: Finished difference. Result has 172 places, 296 transitions, 4033 flow [2024-06-27 17:54:37,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4033, PETRI_PLACES=172, PETRI_TRANSITIONS=296} [2024-06-27 17:54:37,677 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 112 predicate places. [2024-06-27 17:54:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 296 transitions, 4033 flow [2024-06-27 17:54:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:37,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:37,678 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 17:54:37,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:54:37,678 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:37,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash -744561446, now seen corresponding path program 5 times [2024-06-27 17:54:37,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:37,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632380369] [2024-06-27 17:54:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:37,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:37,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:37,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632380369] [2024-06-27 17:54:37,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632380369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:37,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:37,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:37,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078232948] [2024-06-27 17:54:37,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:37,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:37,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:37,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:37,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 296 transitions, 4033 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:37,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:37,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:37,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:39,520 INFO L124 PetriNetUnfolderBase]: 9333/13672 cut-off events. [2024-06-27 17:54:39,520 INFO L125 PetriNetUnfolderBase]: For 310814/310825 co-relation queries the response was YES. [2024-06-27 17:54:39,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93913 conditions, 13672 events. 9333/13672 cut-off events. For 310814/310825 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85911 event pairs, 2671 based on Foata normal form. 9/13647 useless extension candidates. Maximal degree in co-relation 93831. Up to 12374 conditions per place. [2024-06-27 17:54:39,667 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 271 selfloop transitions, 58 changer transitions 0/344 dead transitions. [2024-06-27 17:54:39,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 344 transitions, 5001 flow [2024-06-27 17:54:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:54:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:54:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2024-06-27 17:54:39,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402116402116402 [2024-06-27 17:54:39,669 INFO L175 Difference]: Start difference. First operand has 172 places, 296 transitions, 4033 flow. Second operand 7 states and 242 transitions. [2024-06-27 17:54:39,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 344 transitions, 5001 flow [2024-06-27 17:54:40,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 344 transitions, 4851 flow, removed 75 selfloop flow, removed 0 redundant places. [2024-06-27 17:54:40,506 INFO L231 Difference]: Finished difference. Result has 180 places, 304 transitions, 4187 flow [2024-06-27 17:54:40,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4187, PETRI_PLACES=180, PETRI_TRANSITIONS=304} [2024-06-27 17:54:40,507 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 120 predicate places. [2024-06-27 17:54:40,507 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 304 transitions, 4187 flow [2024-06-27 17:54:40,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:40,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:40,507 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 17:54:40,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:54:40,508 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:40,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash 602983080, now seen corresponding path program 6 times [2024-06-27 17:54:40,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:40,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630583425] [2024-06-27 17:54:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:40,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:40,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630583425] [2024-06-27 17:54:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630583425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:40,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:40,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741592568] [2024-06-27 17:54:40,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:40,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:40,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:40,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:40,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 304 transitions, 4187 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:40,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:40,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:40,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:42,355 INFO L124 PetriNetUnfolderBase]: 9525/13968 cut-off events. [2024-06-27 17:54:42,355 INFO L125 PetriNetUnfolderBase]: For 329590/329601 co-relation queries the response was YES. [2024-06-27 17:54:42,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96914 conditions, 13968 events. 9525/13968 cut-off events. For 329590/329601 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 87750 event pairs, 2523 based on Foata normal form. 12/13959 useless extension candidates. Maximal degree in co-relation 96828. Up to 11900 conditions per place. [2024-06-27 17:54:42,509 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 208 selfloop transitions, 170 changer transitions 0/393 dead transitions. [2024-06-27 17:54:42,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 393 transitions, 5965 flow [2024-06-27 17:54:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:54:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:54:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 318 transitions. [2024-06-27 17:54:42,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2024-06-27 17:54:42,511 INFO L175 Difference]: Start difference. First operand has 180 places, 304 transitions, 4187 flow. Second operand 9 states and 318 transitions. [2024-06-27 17:54:42,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 393 transitions, 5965 flow [2024-06-27 17:54:43,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 393 transitions, 5737 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:43,441 INFO L231 Difference]: Finished difference. Result has 187 places, 332 transitions, 4911 flow [2024-06-27 17:54:43,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4911, PETRI_PLACES=187, PETRI_TRANSITIONS=332} [2024-06-27 17:54:43,442 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 127 predicate places. [2024-06-27 17:54:43,442 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 332 transitions, 4911 flow [2024-06-27 17:54:43,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:43,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:43,442 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 17:54:43,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:54:43,442 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:43,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash -744175496, now seen corresponding path program 7 times [2024-06-27 17:54:43,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:43,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191731311] [2024-06-27 17:54:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:43,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:43,509 INFO 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 17:54:43,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191731311] [2024-06-27 17:54:43,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191731311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:43,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:43,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:43,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152672361] [2024-06-27 17:54:43,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:43,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:43,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:43,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:43,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 332 transitions, 4911 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:43,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:43,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:43,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:45,415 INFO L124 PetriNetUnfolderBase]: 9605/14182 cut-off events. [2024-06-27 17:54:45,415 INFO L125 PetriNetUnfolderBase]: For 370198/370200 co-relation queries the response was YES. [2024-06-27 17:54:45,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102658 conditions, 14182 events. 9605/14182 cut-off events. For 370198/370200 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 90189 event pairs, 2844 based on Foata normal form. 3/14131 useless extension candidates. Maximal degree in co-relation 102570. Up to 11981 conditions per place. [2024-06-27 17:54:45,551 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 200 selfloop transitions, 168 changer transitions 0/383 dead transitions. [2024-06-27 17:54:45,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 383 transitions, 6228 flow [2024-06-27 17:54:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-06-27 17:54:45,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-06-27 17:54:45,552 INFO L175 Difference]: Start difference. First operand has 187 places, 332 transitions, 4911 flow. Second operand 6 states and 219 transitions. [2024-06-27 17:54:45,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 383 transitions, 6228 flow [2024-06-27 17:54:46,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 383 transitions, 5890 flow, removed 134 selfloop flow, removed 3 redundant places. [2024-06-27 17:54:46,537 INFO L231 Difference]: Finished difference. Result has 190 places, 345 transitions, 5174 flow [2024-06-27 17:54:46,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5174, PETRI_PLACES=190, PETRI_TRANSITIONS=345} [2024-06-27 17:54:46,537 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 130 predicate places. [2024-06-27 17:54:46,537 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 345 transitions, 5174 flow [2024-06-27 17:54:46,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:46,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:46,538 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 17:54:46,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:54:46,538 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:46,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash 603190470, now seen corresponding path program 8 times [2024-06-27 17:54:46,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:46,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84835904] [2024-06-27 17:54:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:46,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:46,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84835904] [2024-06-27 17:54:46,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84835904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:46,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:46,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875646428] [2024-06-27 17:54:46,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:46,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:46,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:46,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:54:46,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 345 transitions, 5174 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:46,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:46,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:54:46,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:48,370 INFO L124 PetriNetUnfolderBase]: 9594/14104 cut-off events. [2024-06-27 17:54:48,370 INFO L125 PetriNetUnfolderBase]: For 356833/356844 co-relation queries the response was YES. [2024-06-27 17:54:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100513 conditions, 14104 events. 9594/14104 cut-off events. For 356833/356844 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 88986 event pairs, 2562 based on Foata normal form. 9/14077 useless extension candidates. Maximal degree in co-relation 100423. Up to 11971 conditions per place. [2024-06-27 17:54:48,521 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 202 selfloop transitions, 181 changer transitions 0/398 dead transitions. [2024-06-27 17:54:48,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 398 transitions, 6393 flow [2024-06-27 17:54:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:54:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:54:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 286 transitions. [2024-06-27 17:54:48,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-27 17:54:48,522 INFO L175 Difference]: Start difference. First operand has 190 places, 345 transitions, 5174 flow. Second operand 8 states and 286 transitions. [2024-06-27 17:54:48,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 398 transitions, 6393 flow [2024-06-27 17:54:49,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 398 transitions, 6110 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-27 17:54:49,730 INFO L231 Difference]: Finished difference. Result has 196 places, 345 transitions, 5263 flow [2024-06-27 17:54:49,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5263, PETRI_PLACES=196, PETRI_TRANSITIONS=345} [2024-06-27 17:54:49,730 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 136 predicate places. [2024-06-27 17:54:49,730 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 345 transitions, 5263 flow [2024-06-27 17:54:49,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:54:49,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:49,731 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 17:54:49,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:54:49,731 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:49,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:49,731 INFO L85 PathProgramCache]: Analyzing trace with hash -550579690, now seen corresponding path program 2 times [2024-06-27 17:54:49,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:49,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840060129] [2024-06-27 17:54:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:49,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:49,815 INFO 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 17:54:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840060129] [2024-06-27 17:54:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840060129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:49,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:49,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312042538] [2024-06-27 17:54:49,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:49,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:49,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:49,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:49,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 345 transitions, 5263 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:54:49,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:49,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:49,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:52,363 INFO L124 PetriNetUnfolderBase]: 9846/14839 cut-off events. [2024-06-27 17:54:52,363 INFO L125 PetriNetUnfolderBase]: For 405329/405418 co-relation queries the response was YES. [2024-06-27 17:54:52,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103243 conditions, 14839 events. 9846/14839 cut-off events. For 405329/405418 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 98148 event pairs, 3588 based on Foata normal form. 120/14836 useless extension candidates. Maximal degree in co-relation 103152. Up to 12046 conditions per place. [2024-06-27 17:54:52,510 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 279 selfloop transitions, 62 changer transitions 0/386 dead transitions. [2024-06-27 17:54:52,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 386 transitions, 6273 flow [2024-06-27 17:54:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-06-27 17:54:52,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 17:54:52,512 INFO L175 Difference]: Start difference. First operand has 196 places, 345 transitions, 5263 flow. Second operand 6 states and 216 transitions. [2024-06-27 17:54:52,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 386 transitions, 6273 flow [2024-06-27 17:54:53,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 386 transitions, 5907 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:54:53,553 INFO L231 Difference]: Finished difference. Result has 196 places, 347 transitions, 5096 flow [2024-06-27 17:54:53,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5096, PETRI_PLACES=196, PETRI_TRANSITIONS=347} [2024-06-27 17:54:53,554 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 136 predicate places. [2024-06-27 17:54:53,554 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 347 transitions, 5096 flow [2024-06-27 17:54:53,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:54:53,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:53,554 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 17:54:53,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:54:53,554 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:53,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:53,554 INFO L85 PathProgramCache]: Analyzing trace with hash -537247210, now seen corresponding path program 3 times [2024-06-27 17:54:53,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:53,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099377261] [2024-06-27 17:54:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:53,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:53,724 INFO 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 17:54:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099377261] [2024-06-27 17:54:53,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099377261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:53,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:53,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:54:53,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729121695] [2024-06-27 17:54:53,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:53,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:54:53,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:54:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:54:53,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 54 [2024-06-27 17:54:53,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 347 transitions, 5096 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:54:53,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:53,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 54 [2024-06-27 17:54:53,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:54:56,072 INFO L124 PetriNetUnfolderBase]: 10614/15861 cut-off events. [2024-06-27 17:54:56,073 INFO L125 PetriNetUnfolderBase]: For 444223/444292 co-relation queries the response was YES. [2024-06-27 17:54:56,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110769 conditions, 15861 events. 10614/15861 cut-off events. For 444223/444292 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 105147 event pairs, 3526 based on Foata normal form. 114/15871 useless extension candidates. Maximal degree in co-relation 110677. Up to 11602 conditions per place. [2024-06-27 17:54:56,372 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 282 selfloop transitions, 69 changer transitions 0/396 dead transitions. [2024-06-27 17:54:56,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 396 transitions, 6262 flow [2024-06-27 17:54:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:54:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:54:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2024-06-27 17:54:56,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6820987654320988 [2024-06-27 17:54:56,373 INFO L175 Difference]: Start difference. First operand has 196 places, 347 transitions, 5096 flow. Second operand 6 states and 221 transitions. [2024-06-27 17:54:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 396 transitions, 6262 flow [2024-06-27 17:54:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 396 transitions, 6111 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 17:54:57,673 INFO L231 Difference]: Finished difference. Result has 198 places, 350 transitions, 5174 flow [2024-06-27 17:54:57,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4945, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5174, PETRI_PLACES=198, PETRI_TRANSITIONS=350} [2024-06-27 17:54:57,673 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 138 predicate places. [2024-06-27 17:54:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 350 transitions, 5174 flow [2024-06-27 17:54:57,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 17:54:57,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:54:57,674 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 17:54:57,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:54:57,674 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:54:57,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:54:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2005953857, now seen corresponding path program 2 times [2024-06-27 17:54:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:54:57,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233277315] [2024-06-27 17:54:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:54:57,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:54:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:54:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:54:57,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:54:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233277315] [2024-06-27 17:54:57,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233277315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:54:57,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:54:57,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:54:57,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555128263] [2024-06-27 17:54:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:54:57,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:54:57,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:54:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:54:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:54:57,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-06-27 17:54:57,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 350 transitions, 5174 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 17:54:57,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:54:57,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-06-27 17:54:57,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:00,048 INFO L124 PetriNetUnfolderBase]: 10267/15328 cut-off events. [2024-06-27 17:55:00,048 INFO L125 PetriNetUnfolderBase]: For 469812/470467 co-relation queries the response was YES. [2024-06-27 17:55:00,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109810 conditions, 15328 events. 10267/15328 cut-off events. For 469812/470467 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 102363 event pairs, 3508 based on Foata normal form. 158/15196 useless extension candidates. Maximal degree in co-relation 109717. Up to 13017 conditions per place. [2024-06-27 17:55:00,214 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 242 selfloop transitions, 70 changer transitions 0/377 dead transitions. [2024-06-27 17:55:00,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 377 transitions, 6084 flow [2024-06-27 17:55:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-06-27 17:55:00,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:55:00,215 INFO L175 Difference]: Start difference. First operand has 198 places, 350 transitions, 5174 flow. Second operand 5 states and 177 transitions. [2024-06-27 17:55:00,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 377 transitions, 6084 flow [2024-06-27 17:55:01,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 377 transitions, 5971 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:01,410 INFO L231 Difference]: Finished difference. Result has 201 places, 357 transitions, 5328 flow [2024-06-27 17:55:01,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5328, PETRI_PLACES=201, PETRI_TRANSITIONS=357} [2024-06-27 17:55:01,411 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 141 predicate places. [2024-06-27 17:55:01,411 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 357 transitions, 5328 flow [2024-06-27 17:55:01,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 17:55:01,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:01,411 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 17:55:01,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:55:01,411 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:01,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash -381244004, now seen corresponding path program 1 times [2024-06-27 17:55:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:01,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128525028] [2024-06-27 17:55:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:01,537 INFO 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 17:55:01,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:01,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128525028] [2024-06-27 17:55:01,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128525028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:01,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:01,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:01,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841735211] [2024-06-27 17:55:01,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:01,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:01,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:55:01,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 357 transitions, 5328 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:01,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:01,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:55:01,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:04,387 INFO L124 PetriNetUnfolderBase]: 12469/18354 cut-off events. [2024-06-27 17:55:04,388 INFO L125 PetriNetUnfolderBase]: For 521487/521487 co-relation queries the response was YES. [2024-06-27 17:55:04,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127997 conditions, 18354 events. 12469/18354 cut-off events. For 521487/521487 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 121254 event pairs, 4406 based on Foata normal form. 36/18327 useless extension candidates. Maximal degree in co-relation 127902. Up to 14777 conditions per place. [2024-06-27 17:55:04,587 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 382 selfloop transitions, 45 changer transitions 0/442 dead transitions. [2024-06-27 17:55:04,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 442 transitions, 7067 flow [2024-06-27 17:55:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-06-27 17:55:04,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2024-06-27 17:55:04,589 INFO L175 Difference]: Start difference. First operand has 201 places, 357 transitions, 5328 flow. Second operand 7 states and 259 transitions. [2024-06-27 17:55:04,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 442 transitions, 7067 flow [2024-06-27 17:55:05,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 442 transitions, 6854 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 17:55:05,966 INFO L231 Difference]: Finished difference. Result has 206 places, 365 transitions, 5400 flow [2024-06-27 17:55:05,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5400, PETRI_PLACES=206, PETRI_TRANSITIONS=365} [2024-06-27 17:55:05,967 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 146 predicate places. [2024-06-27 17:55:05,967 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 365 transitions, 5400 flow [2024-06-27 17:55:05,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:05,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:05,967 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 17:55:05,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:55:05,967 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:05,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash 726004954, now seen corresponding path program 2 times [2024-06-27 17:55:05,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:05,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159396758] [2024-06-27 17:55:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:06,133 INFO 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 17:55:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:06,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159396758] [2024-06-27 17:55:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159396758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:06,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:06,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:06,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113785061] [2024-06-27 17:55:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:06,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:55:06,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 365 transitions, 5400 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:06,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:06,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:55:06,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:09,009 INFO L124 PetriNetUnfolderBase]: 12952/18890 cut-off events. [2024-06-27 17:55:09,009 INFO L125 PetriNetUnfolderBase]: For 574743/574743 co-relation queries the response was YES. [2024-06-27 17:55:09,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134887 conditions, 18890 events. 12952/18890 cut-off events. For 574743/574743 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 123750 event pairs, 3555 based on Foata normal form. 42/18909 useless extension candidates. Maximal degree in co-relation 134791. Up to 16874 conditions per place. [2024-06-27 17:55:09,193 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 360 selfloop transitions, 44 changer transitions 0/419 dead transitions. [2024-06-27 17:55:09,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 419 transitions, 6631 flow [2024-06-27 17:55:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 246 transitions. [2024-06-27 17:55:09,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 17:55:09,195 INFO L175 Difference]: Start difference. First operand has 206 places, 365 transitions, 5400 flow. Second operand 7 states and 246 transitions. [2024-06-27 17:55:09,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 419 transitions, 6631 flow [2024-06-27 17:55:10,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 419 transitions, 6530 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 17:55:10,875 INFO L231 Difference]: Finished difference. Result has 211 places, 367 transitions, 5463 flow [2024-06-27 17:55:10,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5463, PETRI_PLACES=211, PETRI_TRANSITIONS=367} [2024-06-27 17:55:10,876 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 151 predicate places. [2024-06-27 17:55:10,877 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 367 transitions, 5463 flow [2024-06-27 17:55:10,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:10,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:10,877 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 17:55:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:55:10,877 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:10,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash 725857084, now seen corresponding path program 3 times [2024-06-27 17:55:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:10,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959248716] [2024-06-27 17:55:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:10,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:55:10,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:10,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959248716] [2024-06-27 17:55:10,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959248716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:10,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:10,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:10,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253290312] [2024-06-27 17:55:10,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:10,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:10,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:10,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:10,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:11,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:55:11,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 367 transitions, 5463 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:11,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:11,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:55:11,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:14,180 INFO L124 PetriNetUnfolderBase]: 13844/20099 cut-off events. [2024-06-27 17:55:14,180 INFO L125 PetriNetUnfolderBase]: For 618660/618660 co-relation queries the response was YES. [2024-06-27 17:55:14,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144371 conditions, 20099 events. 13844/20099 cut-off events. For 618660/618660 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 132420 event pairs, 3588 based on Foata normal form. 36/20120 useless extension candidates. Maximal degree in co-relation 144273. Up to 17101 conditions per place. [2024-06-27 17:55:14,390 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 372 selfloop transitions, 45 changer transitions 0/432 dead transitions. [2024-06-27 17:55:14,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 432 transitions, 6911 flow [2024-06-27 17:55:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:55:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:55:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 251 transitions. [2024-06-27 17:55:14,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2024-06-27 17:55:14,391 INFO L175 Difference]: Start difference. First operand has 211 places, 367 transitions, 5463 flow. Second operand 7 states and 251 transitions. [2024-06-27 17:55:14,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 432 transitions, 6911 flow [2024-06-27 17:55:16,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 432 transitions, 6788 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 17:55:16,622 INFO L231 Difference]: Finished difference. Result has 214 places, 372 transitions, 5575 flow [2024-06-27 17:55:16,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5340, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5575, PETRI_PLACES=214, PETRI_TRANSITIONS=372} [2024-06-27 17:55:16,623 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 154 predicate places. [2024-06-27 17:55:16,623 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 372 transitions, 5575 flow [2024-06-27 17:55:16,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:16,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:16,624 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 17:55:16,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:55:16,624 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:16,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:16,624 INFO L85 PathProgramCache]: Analyzing trace with hash 536023199, now seen corresponding path program 1 times [2024-06-27 17:55:16,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:16,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28662111] [2024-06-27 17:55:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:16,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:16,682 INFO 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 17:55:16,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28662111] [2024-06-27 17:55:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28662111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:16,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:16,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:55:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235118897] [2024-06-27 17:55:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:16,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:55:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:55:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:55:16,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:55:16,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 372 transitions, 5575 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 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 17:55:16,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:16,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:55:16,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:19,665 INFO L124 PetriNetUnfolderBase]: 13859/20127 cut-off events. [2024-06-27 17:55:19,666 INFO L125 PetriNetUnfolderBase]: For 625654/625654 co-relation queries the response was YES. [2024-06-27 17:55:19,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146473 conditions, 20127 events. 13859/20127 cut-off events. For 625654/625654 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 132711 event pairs, 3906 based on Foata normal form. 1/20120 useless extension candidates. Maximal degree in co-relation 146373. Up to 18782 conditions per place. [2024-06-27 17:55:20,114 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 377 selfloop transitions, 20 changer transitions 0/412 dead transitions. [2024-06-27 17:55:20,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 412 transitions, 6836 flow [2024-06-27 17:55:20,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:55:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:55:20,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-27 17:55:20,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:55:20,116 INFO L175 Difference]: Start difference. First operand has 214 places, 372 transitions, 5575 flow. Second operand 5 states and 170 transitions. [2024-06-27 17:55:20,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 412 transitions, 6836 flow [2024-06-27 17:55:22,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 412 transitions, 6719 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 17:55:22,109 INFO L231 Difference]: Finished difference. Result has 218 places, 387 transitions, 5882 flow [2024-06-27 17:55:22,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5472, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5882, PETRI_PLACES=218, PETRI_TRANSITIONS=387} [2024-06-27 17:55:22,110 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 158 predicate places. [2024-06-27 17:55:22,110 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 387 transitions, 5882 flow [2024-06-27 17:55:22,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 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 17:55:22,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:22,111 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 17:55:22,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:55:22,111 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:22,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 844909786, now seen corresponding path program 4 times [2024-06-27 17:55:22,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:22,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008351948] [2024-06-27 17:55:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:22,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:22,206 INFO 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 17:55:22,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:22,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008351948] [2024-06-27 17:55:22,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008351948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:22,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:22,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:22,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18967312] [2024-06-27 17:55:22,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:22,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:22,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:22,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:22,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:22,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:55:22,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 387 transitions, 5882 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:22,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:22,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:55:22,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:55:25,631 INFO L124 PetriNetUnfolderBase]: 14342/21139 cut-off events. [2024-06-27 17:55:25,631 INFO L125 PetriNetUnfolderBase]: For 685406/685406 co-relation queries the response was YES. [2024-06-27 17:55:25,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151347 conditions, 21139 events. 14342/21139 cut-off events. For 685406/685406 co-relation queries the response was YES. Maximal size of possible extension queue 1071. Compared 143310 event pairs, 5488 based on Foata normal form. 42/21079 useless extension candidates. Maximal degree in co-relation 151243. Up to 18838 conditions per place. [2024-06-27 17:55:25,872 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 369 selfloop transitions, 46 changer transitions 0/430 dead transitions. [2024-06-27 17:55:25,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 430 transitions, 7004 flow [2024-06-27 17:55:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:55:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:55:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-06-27 17:55:25,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-27 17:55:25,873 INFO L175 Difference]: Start difference. First operand has 218 places, 387 transitions, 5882 flow. Second operand 6 states and 213 transitions. [2024-06-27 17:55:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 430 transitions, 7004 flow [2024-06-27 17:55:27,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 430 transitions, 6968 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-27 17:55:27,952 INFO L231 Difference]: Finished difference. Result has 224 places, 389 transitions, 6022 flow [2024-06-27 17:55:27,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6022, PETRI_PLACES=224, PETRI_TRANSITIONS=389} [2024-06-27 17:55:27,953 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 164 predicate places. [2024-06-27 17:55:27,953 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 389 transitions, 6022 flow [2024-06-27 17:55:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:27,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:55:27,953 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 17:55:27,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:55:27,953 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 17:55:27,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:55:27,954 INFO L85 PathProgramCache]: Analyzing trace with hash -744315430, now seen corresponding path program 5 times [2024-06-27 17:55:27,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:55:27,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157694678] [2024-06-27 17:55:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:55:27,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:55:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:55:28,049 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 17:55:28,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:55:28,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157694678] [2024-06-27 17:55:28,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157694678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:55:28,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:55:28,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:55:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922118061] [2024-06-27 17:55:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:55:28,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:55:28,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:55:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:55:28,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:55:28,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-06-27 17:55:28,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 389 transitions, 6022 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 17:55:28,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:55:28,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-06-27 17:55:28,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand