./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe027_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:56:56,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:56:56,525 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:56:56,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:56:56,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:56:56,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:56:56,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:56:56,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:56:56,566 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:56:56,569 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:56:56,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:56:56,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:56:56,570 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:56:56,571 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:56:56,571 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:56:56,571 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:56:56,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:56:56,572 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:56:56,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:56:56,572 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:56:56,572 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:56:56,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:56:56,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:56:56,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:56:56,573 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:56:56,573 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:56:56,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:56:56,574 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:56:56,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:56:56,574 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:56:56,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:56:56,575 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:56:56,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:56:56,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:56:56,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:56:56,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:56:56,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:56:56,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:56:56,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:56:56,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:56:56,577 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:56:56,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:56:56,577 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:56:56,578 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:56:56,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:56:56,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:56:56,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:56:56,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:56:56,863 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:56:56,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:56:57,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:56:58,144 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:56:58,145 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:56:58,158 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa4618499/6bb3141ed8b542ca80ef3449ebc63c7a/FLAG59b141a30 [2024-06-21 15:56:58,171 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa4618499/6bb3141ed8b542ca80ef3449ebc63c7a [2024-06-21 15:56:58,174 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:56:58,174 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:56:58,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 15:56:58,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:56:58,291 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:56:58,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:56:58,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:56:58,296 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:56:58,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:56:58" (1/2) ... [2024-06-21 15:56:58,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2b4cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:58, skipping insertion in model container [2024-06-21 15:56:58,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:56:58" (1/2) ... [2024-06-21 15:56:58,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@546ad358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:56:58, skipping insertion in model container [2024-06-21 15:56:58,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:58" (2/2) ... [2024-06-21 15:56:58,299 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2b4cbe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58, skipping insertion in model container [2024-06-21 15:56:58,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:58" (2/2) ... [2024-06-21 15:56:58,299 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:56:58,359 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:56:58,361 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-21 15:56:58,362 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-21 15:56:58,362 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-21 15:56:58,362 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1)) [2024-06-21 15:56:58,362 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:56:58,362 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-21 15:56:58,399 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:56:58,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:56:58,688 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:56:58,766 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:56:58,796 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:56:58,796 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58 WrapperNode [2024-06-21 15:56:58,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:56:58,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:56:58,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:56:58,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:56:58,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,823 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,850 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-21 15:56:58,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:56:58,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:56:58,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:56:58,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:56:58,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,871 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,891 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:56:58,892 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:56:58,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:56:58,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:56:58,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:56:58,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (1/1) ... [2024-06-21 15:56:58,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:56:58,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:56:58,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 15:56:58,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 15:56:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:56:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:56:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:56:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:56:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:56:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:56:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:56:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:56:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 15:56:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 15:56:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:56:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:56:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:56:59,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:56:59,006 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:56:59,103 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:56:59,105 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:56:59,261 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:56:59,261 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:56:59,329 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:56:59,329 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:56:59,330 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:56:59 BoogieIcfgContainer [2024-06-21 15:56:59,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:56:59,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:56:59,331 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:56:59,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:56:59,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:56:58" (1/4) ... [2024-06-21 15:56:59,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeca7a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:56:59, skipping insertion in model container [2024-06-21 15:56:59,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:56:58" (2/4) ... [2024-06-21 15:56:59,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeca7a4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:56:59, skipping insertion in model container [2024-06-21 15:56:59,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:56:58" (3/4) ... [2024-06-21 15:56:59,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeca7a4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:56:59, skipping insertion in model container [2024-06-21 15:56:59,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:56:59" (4/4) ... [2024-06-21 15:56:59,339 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-21 15:56:59,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:56:59,351 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 15:56:59,351 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:56:59,410 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:56:59,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-21 15:56:59,462 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-21 15:56:59,463 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:56:59,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:56:59,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-21 15:56:59,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-21 15:56:59,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:56:59,480 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;@554b8e3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:56:59,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 15:56:59,489 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:56:59,490 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:56:59,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:56:59,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:56:59,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:56:59,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:56:59,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:56:59,496 INFO L85 PathProgramCache]: Analyzing trace with hash 233368746, now seen corresponding path program 1 times [2024-06-21 15:56:59,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:56:59,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185745245] [2024-06-21 15:56:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:56:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:56:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:56:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:56:59,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:56:59,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185745245] [2024-06-21 15:56:59,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185745245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:56:59,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:56:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:56:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075606316] [2024-06-21 15:56:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:56:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:56:59,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:56:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:56:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:56:59,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-06-21 15:56:59,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:56:59,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:56:59,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-06-21 15:56:59,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:00,239 INFO L124 PetriNetUnfolderBase]: 1447/2145 cut-off events. [2024-06-21 15:57:00,240 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-21 15:57:00,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2145 events. 1447/2145 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11460 event pairs, 968 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-21 15:57:00,256 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 35 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-21 15:57:00,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 207 flow [2024-06-21 15:57:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:57:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:57:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-21 15:57:00,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-06-21 15:57:00,268 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 107 transitions. [2024-06-21 15:57:00,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 207 flow [2024-06-21 15:57:00,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:00,275 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-21 15:57:00,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-21 15:57:00,281 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-21 15:57:00,281 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-21 15:57:00,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:00,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:00,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:57:00,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:00,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1102372348, now seen corresponding path program 1 times [2024-06-21 15:57:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:00,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691493366] [2024-06-21 15:57:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:00,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:00,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691493366] [2024-06-21 15:57:00,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691493366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:00,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:00,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:00,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111524861] [2024-06-21 15:57:00,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:00,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:00,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:00,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:00,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:00,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:00,933 INFO L124 PetriNetUnfolderBase]: 2467/3605 cut-off events. [2024-06-21 15:57:00,933 INFO L125 PetriNetUnfolderBase]: For 758/966 co-relation queries the response was YES. [2024-06-21 15:57:00,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 3605 events. 2467/3605 cut-off events. For 758/966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19486 event pairs, 1331 based on Foata normal form. 35/3606 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-21 15:57:00,955 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 51 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-06-21 15:57:00,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 309 flow [2024-06-21 15:57:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-06-21 15:57:00,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-06-21 15:57:00,960 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 138 transitions. [2024-06-21 15:57:00,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 309 flow [2024-06-21 15:57:00,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:00,963 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 152 flow [2024-06-21 15:57:00,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-21 15:57:00,964 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-06-21 15:57:00,965 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 152 flow [2024-06-21 15:57:00,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:00,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:00,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:00,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:57:00,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:00,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1297873024, now seen corresponding path program 1 times [2024-06-21 15:57:00,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:00,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904946104] [2024-06-21 15:57:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:00,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:01,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:01,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904946104] [2024-06-21 15:57:01,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904946104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:01,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:01,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:57:01,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368885927] [2024-06-21 15:57:01,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:01,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:57:01,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:57:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:57:01,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:01,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:01,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:01,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:01,423 INFO L124 PetriNetUnfolderBase]: 2618/4064 cut-off events. [2024-06-21 15:57:01,423 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-21 15:57:01,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 4064 events. 2618/4064 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23315 event pairs, 1356 based on Foata normal form. 3/4039 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-21 15:57:01,440 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 49 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 15:57:01,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 340 flow [2024-06-21 15:57:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-21 15:57:01,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-21 15:57:01,443 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 152 flow. Second operand 4 states and 131 transitions. [2024-06-21 15:57:01,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 340 flow [2024-06-21 15:57:01,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:01,445 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 212 flow [2024-06-21 15:57:01,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 15:57:01,446 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-06-21 15:57:01,446 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 212 flow [2024-06-21 15:57:01,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:01,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:01,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:57:01,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:01,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1969928397, now seen corresponding path program 1 times [2024-06-21 15:57:01,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:01,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768899804] [2024-06-21 15:57:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:01,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:01,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:01,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768899804] [2024-06-21 15:57:01,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768899804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:01,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:01,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:01,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322498352] [2024-06-21 15:57:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:01,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:01,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:01,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:01,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:01,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:01,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:01,894 INFO L124 PetriNetUnfolderBase]: 2603/4009 cut-off events. [2024-06-21 15:57:01,894 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-21 15:57:01,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11036 conditions, 4009 events. 2603/4009 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22726 event pairs, 1272 based on Foata normal form. 6/3970 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-21 15:57:01,915 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 57 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-21 15:57:01,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 430 flow [2024-06-21 15:57:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 15:57:01,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 15:57:01,918 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 212 flow. Second operand 5 states and 161 transitions. [2024-06-21 15:57:01,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 430 flow [2024-06-21 15:57:01,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:01,923 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 264 flow [2024-06-21 15:57:01,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 15:57:01,925 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-21 15:57:01,925 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 264 flow [2024-06-21 15:57:01,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:01,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:01,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:57:01,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:01,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1726107371, now seen corresponding path program 1 times [2024-06-21 15:57:01,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:01,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221799444] [2024-06-21 15:57:01,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:01,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:02,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:02,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221799444] [2024-06-21 15:57:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221799444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:02,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:02,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985470597] [2024-06-21 15:57:02,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:02,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:02,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:02,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:02,458 INFO L124 PetriNetUnfolderBase]: 3372/5076 cut-off events. [2024-06-21 15:57:02,458 INFO L125 PetriNetUnfolderBase]: For 6317/6368 co-relation queries the response was YES. [2024-06-21 15:57:02,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15117 conditions, 5076 events. 3372/5076 cut-off events. For 6317/6368 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28339 event pairs, 1298 based on Foata normal form. 16/5060 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-21 15:57:02,489 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 55 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-21 15:57:02,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 502 flow [2024-06-21 15:57:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-21 15:57:02,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-21 15:57:02,494 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 264 flow. Second operand 4 states and 134 transitions. [2024-06-21 15:57:02,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 502 flow [2024-06-21 15:57:02,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:02,501 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 332 flow [2024-06-21 15:57:02,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 15:57:02,504 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-21 15:57:02,504 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 332 flow [2024-06-21 15:57:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:02,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:57:02,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:02,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1725987401, now seen corresponding path program 2 times [2024-06-21 15:57:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680416915] [2024-06-21 15:57:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:02,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:02,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680416915] [2024-06-21 15:57:02,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680416915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:02,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:02,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891120160] [2024-06-21 15:57:02,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:02,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:02,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:02,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:02,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:02,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:02,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:02,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:03,136 INFO L124 PetriNetUnfolderBase]: 3363/5186 cut-off events. [2024-06-21 15:57:03,136 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-21 15:57:03,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 5186 events. 3363/5186 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29818 event pairs, 1431 based on Foata normal form. 18/5167 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-21 15:57:03,172 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 68 selfloop transitions, 20 changer transitions 0/98 dead transitions. [2024-06-21 15:57:03,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 666 flow [2024-06-21 15:57:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 15:57:03,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 15:57:03,174 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 332 flow. Second operand 5 states and 161 transitions. [2024-06-21 15:57:03,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 666 flow [2024-06-21 15:57:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 600 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:03,187 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 447 flow [2024-06-21 15:57:03,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-06-21 15:57:03,188 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-21 15:57:03,188 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 447 flow [2024-06-21 15:57:03,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:03,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:03,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:03,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:57:03,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:03,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2128335054, now seen corresponding path program 1 times [2024-06-21 15:57:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:03,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409605396] [2024-06-21 15:57:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:03,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:03,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409605396] [2024-06-21 15:57:03,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409605396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:03,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:03,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326196475] [2024-06-21 15:57:03,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:03,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:03,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:03,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:03,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:03,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:03,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:03,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:04,023 INFO L124 PetriNetUnfolderBase]: 4824/7273 cut-off events. [2024-06-21 15:57:04,023 INFO L125 PetriNetUnfolderBase]: For 18239/18453 co-relation queries the response was YES. [2024-06-21 15:57:04,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25583 conditions, 7273 events. 4824/7273 cut-off events. For 18239/18453 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43898 event pairs, 1097 based on Foata normal form. 104/7308 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-21 15:57:04,058 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 87 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-21 15:57:04,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 945 flow [2024-06-21 15:57:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-06-21 15:57:04,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-06-21 15:57:04,059 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 447 flow. Second operand 6 states and 208 transitions. [2024-06-21 15:57:04,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 945 flow [2024-06-21 15:57:04,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 131 transitions, 913 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:04,071 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 594 flow [2024-06-21 15:57:04,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=594, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-21 15:57:04,072 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-06-21 15:57:04,072 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 594 flow [2024-06-21 15:57:04,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:04,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:04,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:04,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:57:04,073 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:04,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1393136916, now seen corresponding path program 2 times [2024-06-21 15:57:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:04,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158149988] [2024-06-21 15:57:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:04,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:04,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158149988] [2024-06-21 15:57:04,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158149988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:04,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:04,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:04,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418764097] [2024-06-21 15:57:04,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:04,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:04,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:04,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:04,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:04,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:04,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:04,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:04,928 INFO L124 PetriNetUnfolderBase]: 4554/6933 cut-off events. [2024-06-21 15:57:04,928 INFO L125 PetriNetUnfolderBase]: For 24501/24735 co-relation queries the response was YES. [2024-06-21 15:57:04,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26096 conditions, 6933 events. 4554/6933 cut-off events. For 24501/24735 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41859 event pairs, 1415 based on Foata normal form. 122/6980 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-21 15:57:04,973 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 77 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2024-06-21 15:57:04,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 936 flow [2024-06-21 15:57:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-21 15:57:04,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.689795918367347 [2024-06-21 15:57:04,975 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 594 flow. Second operand 5 states and 169 transitions. [2024-06-21 15:57:04,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 936 flow [2024-06-21 15:57:05,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 884 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:05,006 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 646 flow [2024-06-21 15:57:05,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=646, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 15:57:05,007 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-21 15:57:05,007 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 646 flow [2024-06-21 15:57:05,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:05,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:05,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:57:05,008 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:05,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:05,009 INFO L85 PathProgramCache]: Analyzing trace with hash -816466250, now seen corresponding path program 3 times [2024-06-21 15:57:05,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:05,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257120184] [2024-06-21 15:57:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:05,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:05,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:05,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257120184] [2024-06-21 15:57:05,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257120184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:05,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:05,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:05,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713099649] [2024-06-21 15:57:05,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:05,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:05,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 646 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:05,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:05,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:05,695 INFO L124 PetriNetUnfolderBase]: 4631/7073 cut-off events. [2024-06-21 15:57:05,695 INFO L125 PetriNetUnfolderBase]: For 25081/25369 co-relation queries the response was YES. [2024-06-21 15:57:05,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27069 conditions, 7073 events. 4631/7073 cut-off events. For 25081/25369 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42789 event pairs, 1615 based on Foata normal form. 34/7038 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-21 15:57:05,743 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-21 15:57:05,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 996 flow [2024-06-21 15:57:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-21 15:57:05,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-21 15:57:05,745 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 646 flow. Second operand 6 states and 192 transitions. [2024-06-21 15:57:05,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 996 flow [2024-06-21 15:57:05,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 948 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:05,789 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 682 flow [2024-06-21 15:57:05,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-21 15:57:05,790 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-06-21 15:57:05,790 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 682 flow [2024-06-21 15:57:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:05,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:05,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:57:05,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:05,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash -816281800, now seen corresponding path program 1 times [2024-06-21 15:57:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:05,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119453651] [2024-06-21 15:57:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:05,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:05,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119453651] [2024-06-21 15:57:05,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119453651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:05,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:05,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:05,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994771953] [2024-06-21 15:57:05,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:05,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:05,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:05,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:05,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:05,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:05,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:05,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:06,438 INFO L124 PetriNetUnfolderBase]: 4592/7016 cut-off events. [2024-06-21 15:57:06,438 INFO L125 PetriNetUnfolderBase]: For 27475/27763 co-relation queries the response was YES. [2024-06-21 15:57:06,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27209 conditions, 7016 events. 4592/7016 cut-off events. For 27475/27763 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42382 event pairs, 1399 based on Foata normal form. 28/6975 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-21 15:57:06,481 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-21 15:57:06,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1059 flow [2024-06-21 15:57:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-21 15:57:06,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 15:57:06,483 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 682 flow. Second operand 6 states and 194 transitions. [2024-06-21 15:57:06,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1059 flow [2024-06-21 15:57:06,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1005 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:06,522 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 736 flow [2024-06-21 15:57:06,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-21 15:57:06,523 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-06-21 15:57:06,523 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 736 flow [2024-06-21 15:57:06,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:06,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:06,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:06,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:57:06,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:06,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash 176708674, now seen corresponding path program 1 times [2024-06-21 15:57:06,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:06,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106848210] [2024-06-21 15:57:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:06,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:06,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:06,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106848210] [2024-06-21 15:57:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106848210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:06,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:06,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169842704] [2024-06-21 15:57:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:06,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:06,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 736 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:06,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:06,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:06,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:07,001 INFO L124 PetriNetUnfolderBase]: 3701/5678 cut-off events. [2024-06-21 15:57:07,001 INFO L125 PetriNetUnfolderBase]: For 26498/26719 co-relation queries the response was YES. [2024-06-21 15:57:07,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23358 conditions, 5678 events. 3701/5678 cut-off events. For 26498/26719 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33929 event pairs, 1373 based on Foata normal form. 6/5624 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-21 15:57:07,040 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2024-06-21 15:57:07,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 1106 flow [2024-06-21 15:57:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-21 15:57:07,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-21 15:57:07,042 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 736 flow. Second operand 5 states and 158 transitions. [2024-06-21 15:57:07,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 1106 flow [2024-06-21 15:57:07,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1047 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:07,075 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 866 flow [2024-06-21 15:57:07,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-21 15:57:07,075 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-21 15:57:07,075 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 866 flow [2024-06-21 15:57:07,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:07,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:07,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:57:07,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:07,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash 228593815, now seen corresponding path program 1 times [2024-06-21 15:57:07,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:07,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439293387] [2024-06-21 15:57:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:07,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:07,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:07,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439293387] [2024-06-21 15:57:07,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439293387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:07,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:07,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:57:07,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408596167] [2024-06-21 15:57:07,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:07,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:57:07,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:07,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:57:07,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:57:07,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:07,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 866 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:07,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:07,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:07,651 INFO L124 PetriNetUnfolderBase]: 5235/7909 cut-off events. [2024-06-21 15:57:07,652 INFO L125 PetriNetUnfolderBase]: For 41346/41452 co-relation queries the response was YES. [2024-06-21 15:57:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31917 conditions, 7909 events. 5235/7909 cut-off events. For 41346/41452 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48386 event pairs, 1971 based on Foata normal form. 12/7763 useless extension candidates. Maximal degree in co-relation 31882. Up to 7087 conditions per place. [2024-06-21 15:57:07,788 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 76 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-21 15:57:07,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 1138 flow [2024-06-21 15:57:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 15:57:07,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 15:57:07,790 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 866 flow. Second operand 4 states and 122 transitions. [2024-06-21 15:57:07,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 1138 flow [2024-06-21 15:57:07,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 1096 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:07,854 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 947 flow [2024-06-21 15:57:07,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=947, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-21 15:57:07,854 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-21 15:57:07,855 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 947 flow [2024-06-21 15:57:07,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:07,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:07,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:07,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:57:07,855 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:07,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -573087969, now seen corresponding path program 1 times [2024-06-21 15:57:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:07,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150345446] [2024-06-21 15:57:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:07,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150345446] [2024-06-21 15:57:07,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150345446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:07,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:07,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:07,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391424631] [2024-06-21 15:57:07,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:07,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:08,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:08,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 947 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:08,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:08,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:08,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:08,634 INFO L124 PetriNetUnfolderBase]: 4657/7188 cut-off events. [2024-06-21 15:57:08,634 INFO L125 PetriNetUnfolderBase]: For 44422/44823 co-relation queries the response was YES. [2024-06-21 15:57:08,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32052 conditions, 7188 events. 4657/7188 cut-off events. For 44422/44823 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44546 event pairs, 1500 based on Foata normal form. 102/7216 useless extension candidates. Maximal degree in co-relation 32013. Up to 5914 conditions per place. [2024-06-21 15:57:08,692 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 102 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-21 15:57:08,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 1450 flow [2024-06-21 15:57:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-21 15:57:08,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 15:57:08,695 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 947 flow. Second operand 6 states and 194 transitions. [2024-06-21 15:57:08,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 1450 flow [2024-06-21 15:57:08,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 149 transitions, 1446 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:08,772 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 1117 flow [2024-06-21 15:57:08,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1117, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-21 15:57:08,772 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2024-06-21 15:57:08,773 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 1117 flow [2024-06-21 15:57:08,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:08,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:08,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:08,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:57:08,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:08,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash 547062797, now seen corresponding path program 2 times [2024-06-21 15:57:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834172461] [2024-06-21 15:57:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834172461] [2024-06-21 15:57:08,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834172461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:08,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:08,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904747051] [2024-06-21 15:57:08,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:08,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:08,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:08,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:08,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:08,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:08,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 1117 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:08,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:08,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:08,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:09,577 INFO L124 PetriNetUnfolderBase]: 4558/7078 cut-off events. [2024-06-21 15:57:09,578 INFO L125 PetriNetUnfolderBase]: For 49842/50193 co-relation queries the response was YES. [2024-06-21 15:57:09,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 7078 events. 4558/7078 cut-off events. For 49842/50193 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44089 event pairs, 1607 based on Foata normal form. 60/7064 useless extension candidates. Maximal degree in co-relation 32263. Up to 6243 conditions per place. [2024-06-21 15:57:09,632 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 100 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-21 15:57:09,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1453 flow [2024-06-21 15:57:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-21 15:57:09,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-21 15:57:09,634 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 1117 flow. Second operand 6 states and 187 transitions. [2024-06-21 15:57:09,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1453 flow [2024-06-21 15:57:09,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1371 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:09,766 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1095 flow [2024-06-21 15:57:09,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1095, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-21 15:57:09,766 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-06-21 15:57:09,766 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1095 flow [2024-06-21 15:57:09,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:09,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:57:09,767 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:09,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1762622183, now seen corresponding path program 1 times [2024-06-21 15:57:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:09,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655447582] [2024-06-21 15:57:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:09,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:09,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655447582] [2024-06-21 15:57:09,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655447582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:09,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:09,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:09,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637221855] [2024-06-21 15:57:09,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:09,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:09,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:09,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1095 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:09,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:09,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:09,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:10,588 INFO L124 PetriNetUnfolderBase]: 5399/8107 cut-off events. [2024-06-21 15:57:10,588 INFO L125 PetriNetUnfolderBase]: For 53418/53807 co-relation queries the response was YES. [2024-06-21 15:57:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36429 conditions, 8107 events. 5399/8107 cut-off events. For 53418/53807 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49203 event pairs, 1733 based on Foata normal form. 56/8035 useless extension candidates. Maximal degree in co-relation 36385. Up to 7318 conditions per place. [2024-06-21 15:57:10,643 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 87 selfloop transitions, 41 changer transitions 0/140 dead transitions. [2024-06-21 15:57:10,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1463 flow [2024-06-21 15:57:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-21 15:57:10,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-21 15:57:10,652 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1095 flow. Second operand 5 states and 160 transitions. [2024-06-21 15:57:10,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1463 flow [2024-06-21 15:57:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 140 transitions, 1407 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:10,735 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 1189 flow [2024-06-21 15:57:10,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-21 15:57:10,736 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-21 15:57:10,736 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 1189 flow [2024-06-21 15:57:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:10,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:10,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:57:10,737 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:10,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1877913353, now seen corresponding path program 2 times [2024-06-21 15:57:10,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:10,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873534188] [2024-06-21 15:57:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:10,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:10,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:10,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873534188] [2024-06-21 15:57:10,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873534188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:10,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:10,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:10,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756716587] [2024-06-21 15:57:10,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:10,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:10,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:10,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:10,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 1189 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:10,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:10,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:10,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:11,527 INFO L124 PetriNetUnfolderBase]: 5466/8212 cut-off events. [2024-06-21 15:57:11,528 INFO L125 PetriNetUnfolderBase]: For 62280/62845 co-relation queries the response was YES. [2024-06-21 15:57:11,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 8212 events. 5466/8212 cut-off events. For 62280/62845 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49988 event pairs, 1737 based on Foata normal form. 90/8176 useless extension candidates. Maximal degree in co-relation 38808. Up to 7362 conditions per place. [2024-06-21 15:57:11,585 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 93 selfloop transitions, 51 changer transitions 0/156 dead transitions. [2024-06-21 15:57:11,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 156 transitions, 1723 flow [2024-06-21 15:57:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 15:57:11,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-21 15:57:11,587 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 1189 flow. Second operand 6 states and 190 transitions. [2024-06-21 15:57:11,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 156 transitions, 1723 flow [2024-06-21 15:57:11,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1621 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:11,691 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1314 flow [2024-06-21 15:57:11,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1314, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-21 15:57:11,692 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-06-21 15:57:11,692 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1314 flow [2024-06-21 15:57:11,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:11,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:11,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:11,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:57:11,693 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:11,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:11,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1878182123, now seen corresponding path program 3 times [2024-06-21 15:57:11,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:11,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057196730] [2024-06-21 15:57:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:11,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:11,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057196730] [2024-06-21 15:57:11,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057196730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:11,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:11,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216670547] [2024-06-21 15:57:11,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:11,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:11,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:11,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:11,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:11,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:11,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:11,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:11,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:12,414 INFO L124 PetriNetUnfolderBase]: 5482/8238 cut-off events. [2024-06-21 15:57:12,414 INFO L125 PetriNetUnfolderBase]: For 72752/73320 co-relation queries the response was YES. [2024-06-21 15:57:12,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40964 conditions, 8238 events. 5482/8238 cut-off events. For 72752/73320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50100 event pairs, 1737 based on Foata normal form. 103/8215 useless extension candidates. Maximal degree in co-relation 40918. Up to 7379 conditions per place. [2024-06-21 15:57:12,473 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 91 selfloop transitions, 55 changer transitions 0/158 dead transitions. [2024-06-21 15:57:12,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1806 flow [2024-06-21 15:57:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-21 15:57:12,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-21 15:57:12,475 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1314 flow. Second operand 6 states and 188 transitions. [2024-06-21 15:57:12,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1806 flow [2024-06-21 15:57:12,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 1707 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:12,689 INFO L231 Difference]: Finished difference. Result has 109 places, 128 transitions, 1396 flow [2024-06-21 15:57:12,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=109, PETRI_TRANSITIONS=128} [2024-06-21 15:57:12,690 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-21 15:57:12,690 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 128 transitions, 1396 flow [2024-06-21 15:57:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:12,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:57:12,691 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:12,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1521738569, now seen corresponding path program 4 times [2024-06-21 15:57:12,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:12,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744373211] [2024-06-21 15:57:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744373211] [2024-06-21 15:57:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744373211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:12,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:12,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:12,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316336143] [2024-06-21 15:57:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:12,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:12,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:12,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:12,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:13,461 INFO L124 PetriNetUnfolderBase]: 5440/8168 cut-off events. [2024-06-21 15:57:13,461 INFO L125 PetriNetUnfolderBase]: For 77188/77756 co-relation queries the response was YES. [2024-06-21 15:57:13,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41051 conditions, 8168 events. 5440/8168 cut-off events. For 77188/77756 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49562 event pairs, 1743 based on Foata normal form. 46/8088 useless extension candidates. Maximal degree in co-relation 41003. Up to 7376 conditions per place. [2024-06-21 15:57:13,522 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-06-21 15:57:13,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1750 flow [2024-06-21 15:57:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-21 15:57:13,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-21 15:57:13,524 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 1396 flow. Second operand 5 states and 162 transitions. [2024-06-21 15:57:13,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1750 flow [2024-06-21 15:57:13,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 154 transitions, 1595 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:13,683 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1337 flow [2024-06-21 15:57:13,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1337, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-21 15:57:13,684 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-21 15:57:13,684 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1337 flow [2024-06-21 15:57:13,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:13,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:13,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:57:13,684 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:13,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash 923773174, now seen corresponding path program 1 times [2024-06-21 15:57:13,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:13,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598362188] [2024-06-21 15:57:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:13,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:13,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598362188] [2024-06-21 15:57:13,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598362188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:13,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:13,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:13,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755548947] [2024-06-21 15:57:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:13,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:13,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1337 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:13,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:13,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:13,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:14,371 INFO L124 PetriNetUnfolderBase]: 5397/8145 cut-off events. [2024-06-21 15:57:14,372 INFO L125 PetriNetUnfolderBase]: For 88152/88271 co-relation queries the response was YES. [2024-06-21 15:57:14,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39954 conditions, 8145 events. 5397/8145 cut-off events. For 88152/88271 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50157 event pairs, 1842 based on Foata normal form. 16/7976 useless extension candidates. Maximal degree in co-relation 39905. Up to 7236 conditions per place. [2024-06-21 15:57:14,433 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 15:57:14,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1645 flow [2024-06-21 15:57:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-21 15:57:14,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 15:57:14,434 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1337 flow. Second operand 4 states and 126 transitions. [2024-06-21 15:57:14,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1645 flow [2024-06-21 15:57:14,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:14,563 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1350 flow [2024-06-21 15:57:14,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1350, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-21 15:57:14,564 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-21 15:57:14,564 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1350 flow [2024-06-21 15:57:14,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:14,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:14,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:14,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:57:14,565 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:14,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash 635343158, now seen corresponding path program 2 times [2024-06-21 15:57:14,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:14,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865155616] [2024-06-21 15:57:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865155616] [2024-06-21 15:57:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865155616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:14,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490562666] [2024-06-21 15:57:14,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:14,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:14,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:14,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1350 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:14,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:14,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:14,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:15,280 INFO L124 PetriNetUnfolderBase]: 5381/8142 cut-off events. [2024-06-21 15:57:15,281 INFO L125 PetriNetUnfolderBase]: For 94399/94518 co-relation queries the response was YES. [2024-06-21 15:57:15,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42156 conditions, 8142 events. 5381/8142 cut-off events. For 94399/94518 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50254 event pairs, 1830 based on Foata normal form. 13/7973 useless extension candidates. Maximal degree in co-relation 42106. Up to 7255 conditions per place. [2024-06-21 15:57:15,346 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 97 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-21 15:57:15,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1777 flow [2024-06-21 15:57:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-21 15:57:15,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-21 15:57:15,348 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1350 flow. Second operand 5 states and 148 transitions. [2024-06-21 15:57:15,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1777 flow [2024-06-21 15:57:15,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1686 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:15,517 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1524 flow [2024-06-21 15:57:15,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1524, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-21 15:57:15,518 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2024-06-21 15:57:15,518 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1524 flow [2024-06-21 15:57:15,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:15,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:15,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:15,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:57:15,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:15,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 624873590, now seen corresponding path program 1 times [2024-06-21 15:57:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:15,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422658117] [2024-06-21 15:57:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:15,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422658117] [2024-06-21 15:57:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422658117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:15,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:15,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:15,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563419461] [2024-06-21 15:57:15,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:15,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:15,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:15,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:57:15,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1524 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:15,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:15,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:57:15,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:16,287 INFO L124 PetriNetUnfolderBase]: 5943/8874 cut-off events. [2024-06-21 15:57:16,287 INFO L125 PetriNetUnfolderBase]: For 93352/93352 co-relation queries the response was YES. [2024-06-21 15:57:16,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46602 conditions, 8874 events. 5943/8874 cut-off events. For 93352/93352 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52806 event pairs, 1941 based on Foata normal form. 1/8871 useless extension candidates. Maximal degree in co-relation 46549. Up to 8299 conditions per place. [2024-06-21 15:57:16,364 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 155 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-21 15:57:16,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2151 flow [2024-06-21 15:57:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-21 15:57:16,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 15:57:16,366 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1524 flow. Second operand 5 states and 147 transitions. [2024-06-21 15:57:16,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2151 flow [2024-06-21 15:57:16,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 2109 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:16,631 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1763 flow [2024-06-21 15:57:16,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1763, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-21 15:57:16,631 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-06-21 15:57:16,631 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1763 flow [2024-06-21 15:57:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:16,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:16,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:16,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:57:16,632 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:16,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash -974949610, now seen corresponding path program 2 times [2024-06-21 15:57:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:16,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109597620] [2024-06-21 15:57:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:16,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:16,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:16,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109597620] [2024-06-21 15:57:16,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109597620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:16,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:16,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428051717] [2024-06-21 15:57:16,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:16,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:57:16,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1763 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:16,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:16,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:57:16,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:17,509 INFO L124 PetriNetUnfolderBase]: 5939/8865 cut-off events. [2024-06-21 15:57:17,510 INFO L125 PetriNetUnfolderBase]: For 103267/103267 co-relation queries the response was YES. [2024-06-21 15:57:17,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48284 conditions, 8865 events. 5939/8865 cut-off events. For 103267/103267 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52839 event pairs, 1947 based on Foata normal form. 1/8861 useless extension candidates. Maximal degree in co-relation 48226. Up to 8295 conditions per place. [2024-06-21 15:57:17,585 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 148 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2024-06-21 15:57:17,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 177 transitions, 2138 flow [2024-06-21 15:57:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 15:57:17,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 15:57:17,587 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1763 flow. Second operand 5 states and 140 transitions. [2024-06-21 15:57:17,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 177 transitions, 2138 flow [2024-06-21 15:57:17,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 2074 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:17,883 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1755 flow [2024-06-21 15:57:17,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1755, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-21 15:57:17,884 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-06-21 15:57:17,884 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1755 flow [2024-06-21 15:57:17,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:17,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:17,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:17,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:57:17,885 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:17,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:17,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2048349136, now seen corresponding path program 1 times [2024-06-21 15:57:17,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:17,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439360262] [2024-06-21 15:57:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:17,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:17,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:17,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439360262] [2024-06-21 15:57:17,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439360262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:17,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:17,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49892192] [2024-06-21 15:57:17,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:17,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:18,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:18,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1755 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:18,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:18,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:18,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:18,787 INFO L124 PetriNetUnfolderBase]: 5414/8239 cut-off events. [2024-06-21 15:57:18,788 INFO L125 PetriNetUnfolderBase]: For 108088/108097 co-relation queries the response was YES. [2024-06-21 15:57:18,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44974 conditions, 8239 events. 5414/8239 cut-off events. For 108088/108097 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50848 event pairs, 1875 based on Foata normal form. 13/8110 useless extension candidates. Maximal degree in co-relation 44913. Up to 7271 conditions per place. [2024-06-21 15:57:18,871 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 125 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-21 15:57:18,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 181 transitions, 2099 flow [2024-06-21 15:57:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 15:57:18,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-21 15:57:18,872 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1755 flow. Second operand 5 states and 146 transitions. [2024-06-21 15:57:18,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 181 transitions, 2099 flow [2024-06-21 15:57:19,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2064 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:19,157 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1795 flow [2024-06-21 15:57:19,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1795, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2024-06-21 15:57:19,158 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-21 15:57:19,158 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1795 flow [2024-06-21 15:57:19,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:19,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:57:19,159 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:19,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1511358293, now seen corresponding path program 1 times [2024-06-21 15:57:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719563672] [2024-06-21 15:57:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:19,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:19,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719563672] [2024-06-21 15:57:19,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719563672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:19,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:19,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:19,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163774154] [2024-06-21 15:57:19,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:19,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:19,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:19,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:19,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:19,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:19,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1795 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:19,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:19,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:19,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:20,143 INFO L124 PetriNetUnfolderBase]: 5639/8539 cut-off events. [2024-06-21 15:57:20,144 INFO L125 PetriNetUnfolderBase]: For 114476/114485 co-relation queries the response was YES. [2024-06-21 15:57:20,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 8539 events. 5639/8539 cut-off events. For 114476/114485 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51993 event pairs, 1938 based on Foata normal form. 7/8503 useless extension candidates. Maximal degree in co-relation 47666. Up to 7745 conditions per place. [2024-06-21 15:57:20,235 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 26 changer transitions 0/191 dead transitions. [2024-06-21 15:57:20,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2274 flow [2024-06-21 15:57:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-21 15:57:20,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-21 15:57:20,236 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1795 flow. Second operand 5 states and 146 transitions. [2024-06-21 15:57:20,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2274 flow [2024-06-21 15:57:20,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 2225 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:20,599 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 1959 flow [2024-06-21 15:57:20,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1959, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2024-06-21 15:57:20,599 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 83 predicate places. [2024-06-21 15:57:20,600 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 1959 flow [2024-06-21 15:57:20,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:20,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:20,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:20,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:57:20,600 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:20,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash 860020480, now seen corresponding path program 1 times [2024-06-21 15:57:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:20,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553662748] [2024-06-21 15:57:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:20,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:20,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:20,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553662748] [2024-06-21 15:57:20,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553662748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:20,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:20,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:20,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460212359] [2024-06-21 15:57:20,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:20,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:20,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:20,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 1959 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:20,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:20,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:20,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:21,941 INFO L124 PetriNetUnfolderBase]: 6497/9982 cut-off events. [2024-06-21 15:57:21,941 INFO L125 PetriNetUnfolderBase]: For 173565/174407 co-relation queries the response was YES. [2024-06-21 15:57:21,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60095 conditions, 9982 events. 6497/9982 cut-off events. For 173565/174407 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 64552 event pairs, 1263 based on Foata normal form. 138/9922 useless extension candidates. Maximal degree in co-relation 60029. Up to 5168 conditions per place. [2024-06-21 15:57:22,015 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 157 selfloop transitions, 70 changer transitions 0/243 dead transitions. [2024-06-21 15:57:22,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2933 flow [2024-06-21 15:57:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 235 transitions. [2024-06-21 15:57:22,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685131195335277 [2024-06-21 15:57:22,017 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 1959 flow. Second operand 7 states and 235 transitions. [2024-06-21 15:57:22,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2933 flow [2024-06-21 15:57:22,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 243 transitions, 2891 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:22,419 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 2199 flow [2024-06-21 15:57:22,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2024-06-21 15:57:22,420 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 91 predicate places. [2024-06-21 15:57:22,420 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 2199 flow [2024-06-21 15:57:22,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:22,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:22,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:57:22,421 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:22,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1542602202, now seen corresponding path program 2 times [2024-06-21 15:57:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797919303] [2024-06-21 15:57:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:22,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:22,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797919303] [2024-06-21 15:57:22,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797919303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:22,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:22,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:22,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885816188] [2024-06-21 15:57:22,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:22,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:22,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:22,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:22,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:22,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:22,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:22,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:22,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:23,509 INFO L124 PetriNetUnfolderBase]: 6392/9844 cut-off events. [2024-06-21 15:57:23,509 INFO L125 PetriNetUnfolderBase]: For 179022/179838 co-relation queries the response was YES. [2024-06-21 15:57:23,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60736 conditions, 9844 events. 6392/9844 cut-off events. For 179022/179838 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63385 event pairs, 1611 based on Foata normal form. 56/9680 useless extension candidates. Maximal degree in co-relation 60666. Up to 8191 conditions per place. [2024-06-21 15:57:23,600 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 173 selfloop transitions, 33 changer transitions 0/222 dead transitions. [2024-06-21 15:57:23,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2779 flow [2024-06-21 15:57:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-21 15:57:23,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 15:57:23,601 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 2199 flow. Second operand 6 states and 189 transitions. [2024-06-21 15:57:23,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2779 flow [2024-06-21 15:57:24,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 222 transitions, 2699 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:24,127 INFO L231 Difference]: Finished difference. Result has 147 places, 184 transitions, 2191 flow [2024-06-21 15:57:24,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2191, PETRI_PLACES=147, PETRI_TRANSITIONS=184} [2024-06-21 15:57:24,128 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-21 15:57:24,128 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 184 transitions, 2191 flow [2024-06-21 15:57:24,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:24,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:24,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:24,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:57:24,129 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:24,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash 354250122, now seen corresponding path program 3 times [2024-06-21 15:57:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:24,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500063055] [2024-06-21 15:57:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:24,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:24,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:24,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500063055] [2024-06-21 15:57:24,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500063055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:24,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679778283] [2024-06-21 15:57:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:24,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:24,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:24,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 184 transitions, 2191 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:24,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:24,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:24,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:25,350 INFO L124 PetriNetUnfolderBase]: 6713/10283 cut-off events. [2024-06-21 15:57:25,351 INFO L125 PetriNetUnfolderBase]: For 200897/201725 co-relation queries the response was YES. [2024-06-21 15:57:25,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63932 conditions, 10283 events. 6713/10283 cut-off events. For 200897/201725 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 66649 event pairs, 1958 based on Foata normal form. 140/10200 useless extension candidates. Maximal degree in co-relation 63860. Up to 6714 conditions per place. [2024-06-21 15:57:25,451 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 151 selfloop transitions, 63 changer transitions 0/230 dead transitions. [2024-06-21 15:57:25,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 230 transitions, 2948 flow [2024-06-21 15:57:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-21 15:57:25,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-21 15:57:25,453 INFO L175 Difference]: Start difference. First operand has 147 places, 184 transitions, 2191 flow. Second operand 6 states and 200 transitions. [2024-06-21 15:57:25,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 230 transitions, 2948 flow [2024-06-21 15:57:26,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 230 transitions, 2874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:26,033 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 2281 flow [2024-06-21 15:57:26,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2024-06-21 15:57:26,033 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 97 predicate places. [2024-06-21 15:57:26,034 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 2281 flow [2024-06-21 15:57:26,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:26,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:26,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:57:26,034 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1742362790, now seen corresponding path program 4 times [2024-06-21 15:57:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117596115] [2024-06-21 15:57:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117596115] [2024-06-21 15:57:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117596115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:26,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:26,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619481459] [2024-06-21 15:57:26,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:26,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:26,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:26,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:26,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 2281 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:26,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:26,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:26,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:27,263 INFO L124 PetriNetUnfolderBase]: 6561/10073 cut-off events. [2024-06-21 15:57:27,264 INFO L125 PetriNetUnfolderBase]: For 200888/201708 co-relation queries the response was YES. [2024-06-21 15:57:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62048 conditions, 10073 events. 6561/10073 cut-off events. For 200888/201708 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 65107 event pairs, 2172 based on Foata normal form. 144/9992 useless extension candidates. Maximal degree in co-relation 61975. Up to 8206 conditions per place. [2024-06-21 15:57:27,355 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 148 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-21 15:57:27,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 219 transitions, 2839 flow [2024-06-21 15:57:27,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-21 15:57:27,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-21 15:57:27,357 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 2281 flow. Second operand 6 states and 191 transitions. [2024-06-21 15:57:27,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 219 transitions, 2839 flow [2024-06-21 15:57:27,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 219 transitions, 2683 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:27,905 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 2247 flow [2024-06-21 15:57:27,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2247, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2024-06-21 15:57:27,906 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-21 15:57:27,906 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 2247 flow [2024-06-21 15:57:27,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:27,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:27,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:27,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:57:27,906 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:27,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 780887688, now seen corresponding path program 5 times [2024-06-21 15:57:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:27,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352063342] [2024-06-21 15:57:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:27,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:28,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:28,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352063342] [2024-06-21 15:57:28,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352063342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:28,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:28,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:28,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105494248] [2024-06-21 15:57:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:28,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:28,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:28,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:28,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 2247 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:28,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:28,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:28,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:29,183 INFO L124 PetriNetUnfolderBase]: 7231/11115 cut-off events. [2024-06-21 15:57:29,184 INFO L125 PetriNetUnfolderBase]: For 219497/220477 co-relation queries the response was YES. [2024-06-21 15:57:29,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68410 conditions, 11115 events. 7231/11115 cut-off events. For 219497/220477 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 73941 event pairs, 2382 based on Foata normal form. 211/11062 useless extension candidates. Maximal degree in co-relation 68337. Up to 8656 conditions per place. [2024-06-21 15:57:29,299 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 153 selfloop transitions, 68 changer transitions 0/237 dead transitions. [2024-06-21 15:57:29,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 3043 flow [2024-06-21 15:57:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-21 15:57:29,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-21 15:57:29,301 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 2247 flow. Second operand 7 states and 226 transitions. [2024-06-21 15:57:29,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 3043 flow [2024-06-21 15:57:29,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 237 transitions, 2900 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:29,872 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2308 flow [2024-06-21 15:57:29,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2308, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-21 15:57:29,873 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2024-06-21 15:57:29,873 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2308 flow [2024-06-21 15:57:29,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:29,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:29,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:29,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:57:29,874 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:29,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:29,874 INFO L85 PathProgramCache]: Analyzing trace with hash 788506248, now seen corresponding path program 6 times [2024-06-21 15:57:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:29,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972169194] [2024-06-21 15:57:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:29,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:29,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972169194] [2024-06-21 15:57:29,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972169194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:29,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:29,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:29,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122222070] [2024-06-21 15:57:29,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:29,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:29,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:29,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:29,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:30,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:30,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2308 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:30,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:30,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:30,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:31,163 INFO L124 PetriNetUnfolderBase]: 7522/11556 cut-off events. [2024-06-21 15:57:31,163 INFO L125 PetriNetUnfolderBase]: For 228128/229140 co-relation queries the response was YES. [2024-06-21 15:57:31,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70903 conditions, 11556 events. 7522/11556 cut-off events. For 228128/229140 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 77552 event pairs, 2612 based on Foata normal form. 209/11481 useless extension candidates. Maximal degree in co-relation 70830. Up to 9873 conditions per place. [2024-06-21 15:57:31,280 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 145 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-21 15:57:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 227 transitions, 2906 flow [2024-06-21 15:57:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-21 15:57:31,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 15:57:31,281 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2308 flow. Second operand 7 states and 217 transitions. [2024-06-21 15:57:31,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 227 transitions, 2906 flow [2024-06-21 15:57:31,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 227 transitions, 2804 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:31,997 INFO L231 Difference]: Finished difference. Result has 155 places, 188 transitions, 2378 flow [2024-06-21 15:57:31,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2378, PETRI_PLACES=155, PETRI_TRANSITIONS=188} [2024-06-21 15:57:31,997 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 103 predicate places. [2024-06-21 15:57:31,997 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 188 transitions, 2378 flow [2024-06-21 15:57:31,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:31,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:31,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:31,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:57:31,998 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:31,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1046794218, now seen corresponding path program 7 times [2024-06-21 15:57:31,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:31,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526663374] [2024-06-21 15:57:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:31,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:32,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:32,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526663374] [2024-06-21 15:57:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526663374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:32,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:32,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:32,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544946403] [2024-06-21 15:57:32,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:32,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:32,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:32,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 188 transitions, 2378 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:32,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:32,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:32,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:33,317 INFO L124 PetriNetUnfolderBase]: 7890/12100 cut-off events. [2024-06-21 15:57:33,317 INFO L125 PetriNetUnfolderBase]: For 239734/240662 co-relation queries the response was YES. [2024-06-21 15:57:33,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74143 conditions, 12100 events. 7890/12100 cut-off events. For 239734/240662 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 81834 event pairs, 2709 based on Foata normal form. 164/11990 useless extension candidates. Maximal degree in co-relation 74068. Up to 10407 conditions per place. [2024-06-21 15:57:33,437 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 143 selfloop transitions, 67 changer transitions 0/226 dead transitions. [2024-06-21 15:57:33,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 226 transitions, 2974 flow [2024-06-21 15:57:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-21 15:57:33,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268221574344023 [2024-06-21 15:57:33,438 INFO L175 Difference]: Start difference. First operand has 155 places, 188 transitions, 2378 flow. Second operand 7 states and 215 transitions. [2024-06-21 15:57:33,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 226 transitions, 2974 flow [2024-06-21 15:57:34,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 226 transitions, 2838 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:34,120 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2412 flow [2024-06-21 15:57:34,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2412, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-21 15:57:34,120 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 105 predicate places. [2024-06-21 15:57:34,121 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2412 flow [2024-06-21 15:57:34,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:34,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:34,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:34,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:57:34,121 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:34,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:34,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2101922504, now seen corresponding path program 8 times [2024-06-21 15:57:34,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:34,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201846977] [2024-06-21 15:57:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:34,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:34,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:34,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201846977] [2024-06-21 15:57:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201846977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:34,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:34,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965708054] [2024-06-21 15:57:34,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:34,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:34,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2412 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:34,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:34,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:34,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:35,482 INFO L124 PetriNetUnfolderBase]: 7788/11900 cut-off events. [2024-06-21 15:57:35,482 INFO L125 PetriNetUnfolderBase]: For 234421/235292 co-relation queries the response was YES. [2024-06-21 15:57:35,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71953 conditions, 11900 events. 7788/11900 cut-off events. For 234421/235292 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 79811 event pairs, 2581 based on Foata normal form. 83/11704 useless extension candidates. Maximal degree in co-relation 71877. Up to 10092 conditions per place. [2024-06-21 15:57:35,598 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 156 selfloop transitions, 55 changer transitions 0/227 dead transitions. [2024-06-21 15:57:35,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2978 flow [2024-06-21 15:57:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-21 15:57:35,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-21 15:57:35,600 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2412 flow. Second operand 6 states and 195 transitions. [2024-06-21 15:57:35,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2978 flow [2024-06-21 15:57:36,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2832 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:36,211 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2388 flow [2024-06-21 15:57:36,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2388, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-21 15:57:36,212 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-21 15:57:36,212 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2388 flow [2024-06-21 15:57:36,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:36,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:36,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:36,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:57:36,212 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:36,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash 958144138, now seen corresponding path program 1 times [2024-06-21 15:57:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:36,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989967669] [2024-06-21 15:57:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:36,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989967669] [2024-06-21 15:57:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989967669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:36,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:36,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:36,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697495384] [2024-06-21 15:57:36,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:36,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:36,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:36,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:36,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:36,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2388 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:36,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:36,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:37,866 INFO L124 PetriNetUnfolderBase]: 8261/12723 cut-off events. [2024-06-21 15:57:37,866 INFO L125 PetriNetUnfolderBase]: For 254506/255466 co-relation queries the response was YES. [2024-06-21 15:57:37,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77052 conditions, 12723 events. 8261/12723 cut-off events. For 254506/255466 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 86889 event pairs, 2393 based on Foata normal form. 144/12601 useless extension candidates. Maximal degree in co-relation 76975. Up to 6218 conditions per place. [2024-06-21 15:57:37,995 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 149 selfloop transitions, 82 changer transitions 0/247 dead transitions. [2024-06-21 15:57:37,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 247 transitions, 3270 flow [2024-06-21 15:57:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-21 15:57:37,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705539358600583 [2024-06-21 15:57:37,997 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2388 flow. Second operand 7 states and 230 transitions. [2024-06-21 15:57:37,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 247 transitions, 3270 flow [2024-06-21 15:57:38,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 247 transitions, 3148 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:38,753 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 2498 flow [2024-06-21 15:57:38,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-21 15:57:38,753 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 108 predicate places. [2024-06-21 15:57:38,753 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 2498 flow [2024-06-21 15:57:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:38,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:38,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:57:38,754 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:38,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 958412908, now seen corresponding path program 2 times [2024-06-21 15:57:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396539405] [2024-06-21 15:57:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:38,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:38,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396539405] [2024-06-21 15:57:38,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396539405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:38,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:38,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:38,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572140651] [2024-06-21 15:57:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:38,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:38,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:38,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:38,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:38,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:40,265 INFO L124 PetriNetUnfolderBase]: 8451/13043 cut-off events. [2024-06-21 15:57:40,265 INFO L125 PetriNetUnfolderBase]: For 273696/274670 co-relation queries the response was YES. [2024-06-21 15:57:40,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79834 conditions, 13043 events. 8451/13043 cut-off events. For 273696/274670 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 89728 event pairs, 2366 based on Foata normal form. 140/12897 useless extension candidates. Maximal degree in co-relation 79756. Up to 6252 conditions per place. [2024-06-21 15:57:40,402 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 147 selfloop transitions, 83 changer transitions 0/246 dead transitions. [2024-06-21 15:57:40,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 246 transitions, 3358 flow [2024-06-21 15:57:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-21 15:57:40,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647230320699709 [2024-06-21 15:57:40,403 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 2498 flow. Second operand 7 states and 228 transitions. [2024-06-21 15:57:40,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 246 transitions, 3358 flow [2024-06-21 15:57:41,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 246 transitions, 3166 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:41,304 INFO L231 Difference]: Finished difference. Result has 163 places, 192 transitions, 2510 flow [2024-06-21 15:57:41,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2510, PETRI_PLACES=163, PETRI_TRANSITIONS=192} [2024-06-21 15:57:41,304 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-21 15:57:41,305 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 192 transitions, 2510 flow [2024-06-21 15:57:41,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:41,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:41,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:57:41,305 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:41,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:41,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1046978668, now seen corresponding path program 3 times [2024-06-21 15:57:41,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:41,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450126525] [2024-06-21 15:57:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:41,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:41,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450126525] [2024-06-21 15:57:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450126525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:41,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:41,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:41,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126103229] [2024-06-21 15:57:41,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:41,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:41,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:41,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:41,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 192 transitions, 2510 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:41,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:41,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:42,889 INFO L124 PetriNetUnfolderBase]: 8730/13544 cut-off events. [2024-06-21 15:57:42,890 INFO L125 PetriNetUnfolderBase]: For 289838/290695 co-relation queries the response was YES. [2024-06-21 15:57:42,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82428 conditions, 13544 events. 8730/13544 cut-off events. For 289838/290695 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 94665 event pairs, 3008 based on Foata normal form. 136/13380 useless extension candidates. Maximal degree in co-relation 82349. Up to 10095 conditions per place. [2024-06-21 15:57:43,019 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 150 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-21 15:57:43,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 237 transitions, 3192 flow [2024-06-21 15:57:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-21 15:57:43,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641399416909621 [2024-06-21 15:57:43,020 INFO L175 Difference]: Start difference. First operand has 163 places, 192 transitions, 2510 flow. Second operand 7 states and 220 transitions. [2024-06-21 15:57:43,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 237 transitions, 3192 flow [2024-06-21 15:57:43,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 3060 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:43,755 INFO L231 Difference]: Finished difference. Result has 166 places, 193 transitions, 2554 flow [2024-06-21 15:57:43,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2554, PETRI_PLACES=166, PETRI_TRANSITIONS=193} [2024-06-21 15:57:43,756 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-06-21 15:57:43,756 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 193 transitions, 2554 flow [2024-06-21 15:57:43,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:43,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:43,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:57:43,757 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:43,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2102106954, now seen corresponding path program 4 times [2024-06-21 15:57:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:43,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397469261] [2024-06-21 15:57:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:43,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:43,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:43,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397469261] [2024-06-21 15:57:43,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397469261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:43,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:43,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316322216] [2024-06-21 15:57:43,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:43,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:43,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:43,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:43,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-21 15:57:43,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 193 transitions, 2554 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:43,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-21 15:57:43,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:45,277 INFO L124 PetriNetUnfolderBase]: 8632/13312 cut-off events. [2024-06-21 15:57:45,278 INFO L125 PetriNetUnfolderBase]: For 282764/283633 co-relation queries the response was YES. [2024-06-21 15:57:45,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79764 conditions, 13312 events. 8632/13312 cut-off events. For 282764/283633 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91715 event pairs, 2422 based on Foata normal form. 75/13051 useless extension candidates. Maximal degree in co-relation 79684. Up to 9827 conditions per place. [2024-06-21 15:57:45,424 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 158 selfloop transitions, 64 changer transitions 0/238 dead transitions. [2024-06-21 15:57:45,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 238 transitions, 3206 flow [2024-06-21 15:57:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-21 15:57:45,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-21 15:57:45,426 INFO L175 Difference]: Start difference. First operand has 166 places, 193 transitions, 2554 flow. Second operand 6 states and 200 transitions. [2024-06-21 15:57:45,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 238 transitions, 3206 flow [2024-06-21 15:57:46,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 238 transitions, 3052 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:46,330 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 2537 flow [2024-06-21 15:57:46,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2024-06-21 15:57:46,330 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2024-06-21 15:57:46,331 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 2537 flow [2024-06-21 15:57:46,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:46,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:46,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:57:46,331 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:46,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1325105589, now seen corresponding path program 1 times [2024-06-21 15:57:46,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:46,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221595554] [2024-06-21 15:57:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:46,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:46,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:46,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221595554] [2024-06-21 15:57:46,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221595554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:46,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:46,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43105735] [2024-06-21 15:57:46,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:46,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:46,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:46,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:57:46,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 2537 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:46,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:57:46,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:48,045 INFO L124 PetriNetUnfolderBase]: 9585/14477 cut-off events. [2024-06-21 15:57:48,046 INFO L125 PetriNetUnfolderBase]: For 256847/256855 co-relation queries the response was YES. [2024-06-21 15:57:48,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84215 conditions, 14477 events. 9585/14477 cut-off events. For 256847/256855 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97168 event pairs, 3552 based on Foata normal form. 7/14479 useless extension candidates. Maximal degree in co-relation 84134. Up to 13575 conditions per place. [2024-06-21 15:57:48,164 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-21 15:57:48,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 226 transitions, 3249 flow [2024-06-21 15:57:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 15:57:48,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-06-21 15:57:48,165 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 2537 flow. Second operand 7 states and 194 transitions. [2024-06-21 15:57:48,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 226 transitions, 3249 flow [2024-06-21 15:57:48,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 226 transitions, 3073 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:48,816 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2635 flow [2024-06-21 15:57:48,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-21 15:57:48,817 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 117 predicate places. [2024-06-21 15:57:48,817 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2635 flow [2024-06-21 15:57:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:48,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:48,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:57:48,818 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:48,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1325404119, now seen corresponding path program 2 times [2024-06-21 15:57:48,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:48,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643923493] [2024-06-21 15:57:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:48,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:48,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643923493] [2024-06-21 15:57:48,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643923493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:48,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:48,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:48,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351298610] [2024-06-21 15:57:48,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:48,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:48,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:48,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:57:48,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 2635 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:48,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:57:48,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:50,389 INFO L124 PetriNetUnfolderBase]: 9581/14462 cut-off events. [2024-06-21 15:57:50,389 INFO L125 PetriNetUnfolderBase]: For 265078/265096 co-relation queries the response was YES. [2024-06-21 15:57:50,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84993 conditions, 14462 events. 9581/14462 cut-off events. For 265078/265096 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97058 event pairs, 3566 based on Foata normal form. 17/14470 useless extension candidates. Maximal degree in co-relation 84910. Up to 13571 conditions per place. [2024-06-21 15:57:50,548 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 171 selfloop transitions, 37 changer transitions 0/217 dead transitions. [2024-06-21 15:57:50,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 217 transitions, 3081 flow [2024-06-21 15:57:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-21 15:57:50,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-06-21 15:57:50,550 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2635 flow. Second operand 5 states and 143 transitions. [2024-06-21 15:57:50,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 217 transitions, 3081 flow [2024-06-21 15:57:51,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 217 transitions, 2955 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:51,341 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 2595 flow [2024-06-21 15:57:51,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2595, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-21 15:57:51,342 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-21 15:57:51,342 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 2595 flow [2024-06-21 15:57:51,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:51,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:51,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:51,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:57:51,343 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:51,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:51,343 INFO L85 PathProgramCache]: Analyzing trace with hash 100814959, now seen corresponding path program 1 times [2024-06-21 15:57:51,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:51,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252704879] [2024-06-21 15:57:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:51,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:51,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252704879] [2024-06-21 15:57:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252704879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624049564] [2024-06-21 15:57:51,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:51,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:51,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:51,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:57:51,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 2595 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) [2024-06-21 15:57:51,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:51,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:57:51,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:52,969 INFO L124 PetriNetUnfolderBase]: 9251/13943 cut-off events. [2024-06-21 15:57:52,970 INFO L125 PetriNetUnfolderBase]: For 310945/311078 co-relation queries the response was YES. [2024-06-21 15:57:53,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83540 conditions, 13943 events. 9251/13943 cut-off events. For 310945/311078 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 94363 event pairs, 3360 based on Foata normal form. 87/13562 useless extension candidates. Maximal degree in co-relation 83455. Up to 12410 conditions per place. [2024-06-21 15:57:53,154 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 130 selfloop transitions, 52 changer transitions 0/226 dead transitions. [2024-06-21 15:57:53,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 226 transitions, 3075 flow [2024-06-21 15:57:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 15:57:53,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 15:57:53,156 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 2595 flow. Second operand 5 states and 155 transitions. [2024-06-21 15:57:53,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 226 transitions, 3075 flow [2024-06-21 15:57:54,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 226 transitions, 2994 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:54,050 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2678 flow [2024-06-21 15:57:54,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2678, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-21 15:57:54,052 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-21 15:57:54,053 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2678 flow [2024-06-21 15:57:54,053 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) [2024-06-21 15:57:54,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:54,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:54,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:57:54,054 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:54,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1090773493, now seen corresponding path program 3 times [2024-06-21 15:57:54,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:54,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005478951] [2024-06-21 15:57:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:54,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:54,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:54,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005478951] [2024-06-21 15:57:54,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005478951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:54,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:54,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:54,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620781356] [2024-06-21 15:57:54,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:54,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:54,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:54,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:54,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:54,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:57:54,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2678 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:54,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:54,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:57:54,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:55,942 INFO L124 PetriNetUnfolderBase]: 9916/14953 cut-off events. [2024-06-21 15:57:55,943 INFO L125 PetriNetUnfolderBase]: For 277080/277088 co-relation queries the response was YES. [2024-06-21 15:57:56,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89497 conditions, 14953 events. 9916/14953 cut-off events. For 277080/277088 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100565 event pairs, 3607 based on Foata normal form. 7/14953 useless extension candidates. Maximal degree in co-relation 89412. Up to 14020 conditions per place. [2024-06-21 15:57:56,109 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 184 selfloop transitions, 47 changer transitions 0/240 dead transitions. [2024-06-21 15:57:56,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 3430 flow [2024-06-21 15:57:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-21 15:57:56,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-21 15:57:56,111 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2678 flow. Second operand 6 states and 172 transitions. [2024-06-21 15:57:56,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 3430 flow [2024-06-21 15:57:57,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 3322 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:57,011 INFO L231 Difference]: Finished difference. Result has 176 places, 220 transitions, 2876 flow [2024-06-21 15:57:57,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2876, PETRI_PLACES=176, PETRI_TRANSITIONS=220} [2024-06-21 15:57:57,012 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 124 predicate places. [2024-06-21 15:57:57,012 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 220 transitions, 2876 flow [2024-06-21 15:57:57,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:57,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:57,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:57,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:57:57,014 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:57:57,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash -118815385, now seen corresponding path program 4 times [2024-06-21 15:57:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:57,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614898795] [2024-06-21 15:57:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:57,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614898795] [2024-06-21 15:57:57,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614898795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:57,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:57,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:57,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488588983] [2024-06-21 15:57:57,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:57,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:57,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:57,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:57:57,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 220 transitions, 2876 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:57,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:57,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:57:57,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:59,039 INFO L124 PetriNetUnfolderBase]: 9923/14946 cut-off events. [2024-06-21 15:57:59,040 INFO L125 PetriNetUnfolderBase]: For 280253/280271 co-relation queries the response was YES. [2024-06-21 15:57:59,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89515 conditions, 14946 events. 9923/14946 cut-off events. For 280253/280271 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100262 event pairs, 3628 based on Foata normal form. 17/14954 useless extension candidates. Maximal degree in co-relation 89428. Up to 14028 conditions per place. [2024-06-21 15:57:59,185 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 51 changer transitions 0/238 dead transitions. [2024-06-21 15:57:59,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3506 flow [2024-06-21 15:57:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-21 15:57:59,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-21 15:57:59,187 INFO L175 Difference]: Start difference. First operand has 176 places, 220 transitions, 2876 flow. Second operand 6 states and 166 transitions. [2024-06-21 15:57:59,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3506 flow [2024-06-21 15:58:00,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 238 transitions, 3412 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:00,046 INFO L231 Difference]: Finished difference. Result has 181 places, 224 transitions, 2963 flow [2024-06-21 15:58:00,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2963, PETRI_PLACES=181, PETRI_TRANSITIONS=224} [2024-06-21 15:58:00,047 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 129 predicate places. [2024-06-21 15:58:00,047 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 224 transitions, 2963 flow [2024-06-21 15:58:00,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:00,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:00,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:58:00,048 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 679443797, now seen corresponding path program 5 times [2024-06-21 15:58:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473542265] [2024-06-21 15:58:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:00,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:00,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473542265] [2024-06-21 15:58:00,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473542265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:00,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:00,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:00,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206942219] [2024-06-21 15:58:00,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:00,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:00,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:58:00,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 224 transitions, 2963 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:00,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:00,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:58:00,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:02,136 INFO L124 PetriNetUnfolderBase]: 9919/14945 cut-off events. [2024-06-21 15:58:02,136 INFO L125 PetriNetUnfolderBase]: For 280165/280183 co-relation queries the response was YES. [2024-06-21 15:58:02,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88237 conditions, 14945 events. 9919/14945 cut-off events. For 280165/280183 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100358 event pairs, 3632 based on Foata normal form. 17/14953 useless extension candidates. Maximal degree in co-relation 88147. Up to 14024 conditions per place. [2024-06-21 15:58:02,303 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 177 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-21 15:58:02,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 237 transitions, 3451 flow [2024-06-21 15:58:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-21 15:58:02,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-21 15:58:02,322 INFO L175 Difference]: Start difference. First operand has 181 places, 224 transitions, 2963 flow. Second operand 6 states and 165 transitions. [2024-06-21 15:58:02,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 237 transitions, 3451 flow [2024-06-21 15:58:03,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 3264 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:03,226 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2885 flow [2024-06-21 15:58:03,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2885, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-21 15:58:03,231 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-06-21 15:58:03,232 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2885 flow [2024-06-21 15:58:03,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:03,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:03,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:03,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:58:03,232 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:03,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 679456693, now seen corresponding path program 2 times [2024-06-21 15:58:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:03,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101318078] [2024-06-21 15:58:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:03,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:03,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101318078] [2024-06-21 15:58:03,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101318078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:03,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:03,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:03,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323728540] [2024-06-21 15:58:03,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:03,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:03,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:58:03,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2885 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) [2024-06-21 15:58:03,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:03,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:58:03,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:05,206 INFO L124 PetriNetUnfolderBase]: 9365/14121 cut-off events. [2024-06-21 15:58:05,206 INFO L125 PetriNetUnfolderBase]: For 312052/312177 co-relation queries the response was YES. [2024-06-21 15:58:05,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85204 conditions, 14121 events. 9365/14121 cut-off events. For 312052/312177 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 95734 event pairs, 3368 based on Foata normal form. 43/13697 useless extension candidates. Maximal degree in co-relation 85113. Up to 12796 conditions per place. [2024-06-21 15:58:05,370 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 153 selfloop transitions, 38 changer transitions 0/243 dead transitions. [2024-06-21 15:58:05,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 243 transitions, 3355 flow [2024-06-21 15:58:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-21 15:58:05,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-21 15:58:05,372 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2885 flow. Second operand 6 states and 174 transitions. [2024-06-21 15:58:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 243 transitions, 3355 flow [2024-06-21 15:58:06,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 243 transitions, 3207 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:06,389 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 2848 flow [2024-06-21 15:58:06,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2848, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-21 15:58:06,390 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 133 predicate places. [2024-06-21 15:58:06,390 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 2848 flow [2024-06-21 15:58:06,390 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) [2024-06-21 15:58:06,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:06,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:58:06,391 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:06,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1368517167, now seen corresponding path program 3 times [2024-06-21 15:58:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:06,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408508805] [2024-06-21 15:58:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:06,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408508805] [2024-06-21 15:58:06,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408508805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:06,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:06,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538713599] [2024-06-21 15:58:06,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:06,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:06,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:06,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-21 15:58:06,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 2848 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) [2024-06-21 15:58:06,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:06,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-21 15:58:06,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:08,228 INFO L124 PetriNetUnfolderBase]: 9373/14125 cut-off events. [2024-06-21 15:58:08,228 INFO L125 PetriNetUnfolderBase]: For 319277/319390 co-relation queries the response was YES. [2024-06-21 15:58:08,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86240 conditions, 14125 events. 9373/14125 cut-off events. For 319277/319390 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95515 event pairs, 3340 based on Foata normal form. 41/13705 useless extension candidates. Maximal degree in co-relation 86149. Up to 12680 conditions per place. [2024-06-21 15:58:08,361 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 154 selfloop transitions, 43 changer transitions 0/249 dead transitions. [2024-06-21 15:58:08,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 249 transitions, 3368 flow [2024-06-21 15:58:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-21 15:58:08,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 15:58:08,363 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 2848 flow. Second operand 6 states and 176 transitions. [2024-06-21 15:58:08,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 249 transitions, 3368 flow [2024-06-21 15:58:09,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 249 transitions, 3287 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:09,376 INFO L231 Difference]: Finished difference. Result has 188 places, 229 transitions, 2921 flow [2024-06-21 15:58:09,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2921, PETRI_PLACES=188, PETRI_TRANSITIONS=229} [2024-06-21 15:58:09,376 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-21 15:58:09,376 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 229 transitions, 2921 flow [2024-06-21 15:58:09,377 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) [2024-06-21 15:58:09,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:09,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:09,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:58:09,377 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:09,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash -800445355, now seen corresponding path program 1 times [2024-06-21 15:58:09,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:09,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116353369] [2024-06-21 15:58:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:09,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:09,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116353369] [2024-06-21 15:58:09,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116353369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:09,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:09,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982847748] [2024-06-21 15:58:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:09,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:09,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:09,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:58:09,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 229 transitions, 2921 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:09,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:09,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:58:09,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:11,462 INFO L124 PetriNetUnfolderBase]: 10126/15244 cut-off events. [2024-06-21 15:58:11,462 INFO L125 PetriNetUnfolderBase]: For 326226/326226 co-relation queries the response was YES. [2024-06-21 15:58:11,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92937 conditions, 15244 events. 10126/15244 cut-off events. For 326226/326226 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 102433 event pairs, 3653 based on Foata normal form. 6/15246 useless extension candidates. Maximal degree in co-relation 92844. Up to 14266 conditions per place. [2024-06-21 15:58:11,625 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 234 selfloop transitions, 25 changer transitions 0/268 dead transitions. [2024-06-21 15:58:11,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 268 transitions, 3724 flow [2024-06-21 15:58:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 15:58:11,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 15:58:11,627 INFO L175 Difference]: Start difference. First operand has 188 places, 229 transitions, 2921 flow. Second operand 6 states and 179 transitions. [2024-06-21 15:58:11,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 268 transitions, 3724 flow [2024-06-21 15:58:12,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 268 transitions, 3640 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:12,790 INFO L231 Difference]: Finished difference. Result has 192 places, 235 transitions, 3006 flow [2024-06-21 15:58:12,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3006, PETRI_PLACES=192, PETRI_TRANSITIONS=235} [2024-06-21 15:58:12,791 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 140 predicate places. [2024-06-21 15:58:12,791 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 235 transitions, 3006 flow [2024-06-21 15:58:12,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:12,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:12,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:12,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:58:12,792 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:12,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:12,792 INFO L85 PathProgramCache]: Analyzing trace with hash -791874475, now seen corresponding path program 2 times [2024-06-21 15:58:12,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:12,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023596031] [2024-06-21 15:58:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:12,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023596031] [2024-06-21 15:58:13,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023596031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:13,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:13,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713190529] [2024-06-21 15:58:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:13,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:13,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:13,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:58:13,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 235 transitions, 3006 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:13,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:13,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:58:13,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:15,170 INFO L124 PetriNetUnfolderBase]: 10170/15304 cut-off events. [2024-06-21 15:58:15,170 INFO L125 PetriNetUnfolderBase]: For 342513/342513 co-relation queries the response was YES. [2024-06-21 15:58:15,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94056 conditions, 15304 events. 10170/15304 cut-off events. For 342513/342513 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 102982 event pairs, 3644 based on Foata normal form. 8/15308 useless extension candidates. Maximal degree in co-relation 93961. Up to 14402 conditions per place. [2024-06-21 15:58:15,330 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 229 selfloop transitions, 22 changer transitions 0/260 dead transitions. [2024-06-21 15:58:15,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 260 transitions, 3626 flow [2024-06-21 15:58:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 15:58:15,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-21 15:58:15,331 INFO L175 Difference]: Start difference. First operand has 192 places, 235 transitions, 3006 flow. Second operand 6 states and 170 transitions. [2024-06-21 15:58:15,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 260 transitions, 3626 flow [2024-06-21 15:58:16,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 260 transitions, 3569 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:16,586 INFO L231 Difference]: Finished difference. Result has 196 places, 237 transitions, 3041 flow [2024-06-21 15:58:16,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3041, PETRI_PLACES=196, PETRI_TRANSITIONS=237} [2024-06-21 15:58:16,586 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-21 15:58:16,586 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 237 transitions, 3041 flow [2024-06-21 15:58:16,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:16,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:16,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:58:16,587 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:16,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1090577015, now seen corresponding path program 1 times [2024-06-21 15:58:16,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:16,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000266232] [2024-06-21 15:58:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:16,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:16,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:16,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000266232] [2024-06-21 15:58:16,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000266232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:16,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:16,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929873076] [2024-06-21 15:58:16,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:16,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:58:16,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 237 transitions, 3041 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:16,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:16,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:58:16,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:18,794 INFO L124 PetriNetUnfolderBase]: 10188/15329 cut-off events. [2024-06-21 15:58:18,795 INFO L125 PetriNetUnfolderBase]: For 348889/348893 co-relation queries the response was YES. [2024-06-21 15:58:18,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94445 conditions, 15329 events. 10188/15329 cut-off events. For 348889/348893 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103042 event pairs, 3619 based on Foata normal form. 5/15329 useless extension candidates. Maximal degree in co-relation 94348. Up to 14410 conditions per place. [2024-06-21 15:58:18,945 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-21 15:58:18,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 4013 flow [2024-06-21 15:58:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-21 15:58:18,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 15:58:18,947 INFO L175 Difference]: Start difference. First operand has 196 places, 237 transitions, 3041 flow. Second operand 6 states and 176 transitions. [2024-06-21 15:58:18,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 4013 flow [2024-06-21 15:58:20,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 3963 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:20,384 INFO L231 Difference]: Finished difference. Result has 200 places, 252 transitions, 3326 flow [2024-06-21 15:58:20,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3326, PETRI_PLACES=200, PETRI_TRANSITIONS=252} [2024-06-21 15:58:20,385 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 148 predicate places. [2024-06-21 15:58:20,385 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 252 transitions, 3326 flow [2024-06-21 15:58:20,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:20,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:20,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:20,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:58:20,386 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:20,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:20,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1090784405, now seen corresponding path program 2 times [2024-06-21 15:58:20,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:20,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557914783] [2024-06-21 15:58:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:20,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:20,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:20,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557914783] [2024-06-21 15:58:20,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557914783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:20,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:20,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312370658] [2024-06-21 15:58:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:20,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:20,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:20,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:58:20,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 252 transitions, 3326 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:20,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:20,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:58:20,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:22,659 INFO L124 PetriNetUnfolderBase]: 10206/15364 cut-off events. [2024-06-21 15:58:22,659 INFO L125 PetriNetUnfolderBase]: For 374233/374237 co-relation queries the response was YES. [2024-06-21 15:58:22,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97423 conditions, 15364 events. 10206/15364 cut-off events. For 374233/374237 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103477 event pairs, 3624 based on Foata normal form. 5/15364 useless extension candidates. Maximal degree in co-relation 97323. Up to 14430 conditions per place. [2024-06-21 15:58:22,811 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 226 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2024-06-21 15:58:22,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 282 transitions, 4233 flow [2024-06-21 15:58:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 15:58:22,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-21 15:58:22,813 INFO L175 Difference]: Start difference. First operand has 200 places, 252 transitions, 3326 flow. Second operand 6 states and 173 transitions. [2024-06-21 15:58:22,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 282 transitions, 4233 flow [2024-06-21 15:58:24,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 282 transitions, 4116 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-21 15:58:24,142 INFO L231 Difference]: Finished difference. Result has 206 places, 261 transitions, 3483 flow [2024-06-21 15:58:24,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3483, PETRI_PLACES=206, PETRI_TRANSITIONS=261} [2024-06-21 15:58:24,143 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-21 15:58:24,143 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 261 transitions, 3483 flow [2024-06-21 15:58:24,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:24,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:24,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:24,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:58:24,143 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:24,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1227032649, now seen corresponding path program 3 times [2024-06-21 15:58:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619660745] [2024-06-21 15:58:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:24,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:24,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:24,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619660745] [2024-06-21 15:58:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619660745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:24,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:24,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798976050] [2024-06-21 15:58:24,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:24,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:24,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:24,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:58:24,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 261 transitions, 3483 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:24,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:24,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:58:24,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:26,462 INFO L124 PetriNetUnfolderBase]: 10180/15326 cut-off events. [2024-06-21 15:58:26,462 INFO L125 PetriNetUnfolderBase]: For 385388/385388 co-relation queries the response was YES. [2024-06-21 15:58:26,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97265 conditions, 15326 events. 10180/15326 cut-off events. For 385388/385388 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103174 event pairs, 3617 based on Foata normal form. 8/15329 useless extension candidates. Maximal degree in co-relation 97162. Up to 14414 conditions per place. [2024-06-21 15:58:26,623 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 248 selfloop transitions, 22 changer transitions 0/279 dead transitions. [2024-06-21 15:58:26,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 279 transitions, 4104 flow [2024-06-21 15:58:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 15:58:26,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-21 15:58:26,625 INFO L175 Difference]: Start difference. First operand has 206 places, 261 transitions, 3483 flow. Second operand 6 states and 164 transitions. [2024-06-21 15:58:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 279 transitions, 4104 flow [2024-06-21 15:58:28,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 279 transitions, 4014 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:28,440 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 3458 flow [2024-06-21 15:58:28,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-21 15:58:28,441 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2024-06-21 15:58:28,441 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 3458 flow [2024-06-21 15:58:28,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:28,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:28,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:58:28,442 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 15:58:28,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:28,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2035623001, now seen corresponding path program 3 times [2024-06-21 15:58:28,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:28,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433540199] [2024-06-21 15:58:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:28,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:28,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433540199] [2024-06-21 15:58:28,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433540199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:28,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:28,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:28,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370079410] [2024-06-21 15:58:28,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:28,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:28,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:28,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-21 15:58:28,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 3458 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:28,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:28,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-21 15:58:28,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand