./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_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/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/thin002_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-7724a2d-m [2024-06-27 19:38:08,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:38:08,793 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:38:08,801 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:38:08,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:38:08,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:38:08,826 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:38:08,826 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:38:08,827 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:38:08,830 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:38:08,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:38:08,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:38:08,831 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:38:08,832 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:38:08,832 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:38:08,833 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:38:08,833 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:38:08,833 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:38:08,833 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:38:08,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:38:08,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:38:08,834 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:38:08,834 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:38:08,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:38:08,835 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:38:08,835 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:38:08,835 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:38:08,835 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:38:08,836 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:38:08,836 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:38:08,837 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:38:08,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:38:08,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:38:08,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:38:08,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:38:08,838 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:38:08,838 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:38:08,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:38:08,838 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:38:08,839 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:38:08,839 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:38:08,839 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:38:08,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:38:08,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:38:09,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:38:09,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:38:09,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:38:09,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:38:09,048 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:38:09,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:38:10,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:38:10,203 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:38:10,203 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:38:10,216 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7b696de/4f8d259e729b49a393fe8595bceaba4b/FLAG564937139 [2024-06-27 19:38:10,226 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7b696de/4f8d259e729b49a393fe8595bceaba4b [2024-06-27 19:38:10,230 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:38:10,230 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:38:10,231 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 19:38:10,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:38:10,375 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:38:10,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:38:10,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:38:10,381 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:38:10,382 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:38:10" (1/2) ... [2024-06-27 19:38:10,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0929be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:38:10, skipping insertion in model container [2024-06-27 19:38:10,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:38:10" (1/2) ... [2024-06-27 19:38:10,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fc171ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:38:10, skipping insertion in model container [2024-06-27 19:38:10,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:38:10" (2/2) ... [2024-06-27 19:38:10,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0929be and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10, skipping insertion in model container [2024-06-27 19:38:10,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:38:10" (2/2) ... [2024-06-27 19:38:10,386 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:38:10,476 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:38:10,477 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 19:38:10,477 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 19:38:10,477 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 19:38:10,477 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((! multithreaded || (a == 0 || a == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) [2024-06-27 19:38:10,478 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:38:10,478 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-27 19:38:10,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:38:10,753 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:38:10,761 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:38:10,869 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:38:10,908 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:38:10,909 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10 WrapperNode [2024-06-27 19:38:10,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:38:10,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:38:10,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:38:10,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:38:10,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,926 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,958 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-27 19:38:10,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:38:10,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:38:10,959 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:38:10,959 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:38:10,970 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,991 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:38:10,992 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,992 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,998 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:10,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:11,000 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:11,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:38:11,003 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:38:11,003 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:38:11,003 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:38:11,004 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (1/1) ... [2024-06-27 19:38:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:38:11,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:38:11,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:38:11,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:38:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:38:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:38:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:38:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:38:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:38:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:38:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:38:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:38:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 19:38:11,074 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 19:38:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:38:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:38:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:38:11,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:38:11,076 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:38:11,160 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:38:11,161 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:38:11,328 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:38:11,328 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:38:11,401 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:38:11,401 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:38:11,401 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:38:11 BoogieIcfgContainer [2024-06-27 19:38:11,401 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:38:11,403 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:38:11,403 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:38:11,405 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:38:11,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:38:10" (1/4) ... [2024-06-27 19:38:11,406 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb87a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:38:11, skipping insertion in model container [2024-06-27 19:38:11,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:38:10" (2/4) ... [2024-06-27 19:38:11,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb87a5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:38:11, skipping insertion in model container [2024-06-27 19:38:11,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:38:10" (3/4) ... [2024-06-27 19:38:11,407 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb87a5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:38:11, skipping insertion in model container [2024-06-27 19:38:11,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:38:11" (4/4) ... [2024-06-27 19:38:11,408 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:38:11,421 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:38:11,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:38:11,422 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:38:11,455 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:38:11,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 19:38:11,502 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-27 19:38:11,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:38:11,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 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. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:38:11,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-27 19:38:11,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-27 19:38:11,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:38:11,519 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;@51d1ac6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:38:11,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 19:38:11,522 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:38:11,522 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:38:11,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:38:11,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:11,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:38:11,525 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)] === [2024-06-27 19:38:11,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash 237074108, now seen corresponding path program 1 times [2024-06-27 19:38:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:11,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075650375] [2024-06-27 19:38:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:11,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:11,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075650375] [2024-06-27 19:38:11,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075650375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:11,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:11,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:38:11,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554243721] [2024-06-27 19:38:11,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:11,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:38:11,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:38:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:38:11,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2024-06-27 19:38:11,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 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) [2024-06-27 19:38:11,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:11,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2024-06-27 19:38:11,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:12,440 INFO L124 PetriNetUnfolderBase]: 2723/4077 cut-off events. [2024-06-27 19:38:12,441 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-27 19:38:12,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4077 events. 2723/4077 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22522 event pairs, 1898 based on Foata normal form. 1/3991 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-27 19:38:12,466 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 37 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-27 19:38:12,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 215 flow [2024-06-27 19:38:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:38:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:38:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-06-27 19:38:12,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7124183006535948 [2024-06-27 19:38:12,477 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 109 transitions. [2024-06-27 19:38:12,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 215 flow [2024-06-27 19:38:12,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:12,481 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-27 19:38:12,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-27 19:38:12,485 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-27 19:38:12,486 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-27 19:38:12,486 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) [2024-06-27 19:38:12,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:12,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:12,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:38:12,487 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)] === [2024-06-27 19:38:12,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1772714873, now seen corresponding path program 1 times [2024-06-27 19:38:12,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:12,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272433612] [2024-06-27 19:38:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:12,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:12,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:12,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272433612] [2024-06-27 19:38:12,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272433612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:12,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:12,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:38:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263572046] [2024-06-27 19:38:12,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:12,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:38:12,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:38:12,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:38:12,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:12,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:12,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:12,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:12,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:13,207 INFO L124 PetriNetUnfolderBase]: 4389/6481 cut-off events. [2024-06-27 19:38:13,207 INFO L125 PetriNetUnfolderBase]: For 1055/1075 co-relation queries the response was YES. [2024-06-27 19:38:13,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14771 conditions, 6481 events. 4389/6481 cut-off events. For 1055/1075 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36508 event pairs, 2308 based on Foata normal form. 10/6482 useless extension candidates. Maximal degree in co-relation 14759. Up to 6039 conditions per place. [2024-06-27 19:38:13,244 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 54 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-27 19:38:13,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 338 flow [2024-06-27 19:38:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:38:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:38:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-27 19:38:13,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-27 19:38:13,246 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 139 transitions. [2024-06-27 19:38:13,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 338 flow [2024-06-27 19:38:13,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:38:13,248 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 200 flow [2024-06-27 19:38:13,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-27 19:38:13,249 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-06-27 19:38:13,249 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 200 flow [2024-06-27 19:38:13,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:13,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:38:13,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:13,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1522984968, now seen corresponding path program 1 times [2024-06-27 19:38:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740352765] [2024-06-27 19:38:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:13,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:13,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740352765] [2024-06-27 19:38:13,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740352765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:13,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:13,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:38:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97615174] [2024-06-27 19:38:13,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:13,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:38:13,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:38:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:38:13,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:13,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:13,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:13,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:14,022 INFO L124 PetriNetUnfolderBase]: 4373/6453 cut-off events. [2024-06-27 19:38:14,022 INFO L125 PetriNetUnfolderBase]: For 3044/3123 co-relation queries the response was YES. [2024-06-27 19:38:14,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16579 conditions, 6453 events. 4373/6453 cut-off events. For 3044/3123 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36299 event pairs, 1831 based on Foata normal form. 32/6476 useless extension candidates. Maximal degree in co-relation 16564. Up to 5973 conditions per place. [2024-06-27 19:38:14,065 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 61 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-27 19:38:14,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 430 flow [2024-06-27 19:38:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 168 transitions. [2024-06-27 19:38:14,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2024-06-27 19:38:14,071 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 200 flow. Second operand 5 states and 168 transitions. [2024-06-27 19:38:14,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 430 flow [2024-06-27 19:38:14,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:38:14,076 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 246 flow [2024-06-27 19:38:14,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=190, 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=246, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 19:38:14,077 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-27 19:38:14,077 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 246 flow [2024-06-27 19:38:14,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:14,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:14,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:14,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:38:14,079 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)] === [2024-06-27 19:38:14,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1039655761, now seen corresponding path program 1 times [2024-06-27 19:38:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:14,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934271021] [2024-06-27 19:38:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:14,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:14,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:14,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934271021] [2024-06-27 19:38:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934271021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:14,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:14,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:38:14,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364980411] [2024-06-27 19:38:14,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:14,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:38:14,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:14,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:38:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:38:14,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:14,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 246 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) [2024-06-27 19:38:14,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:14,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:14,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:14,811 INFO L124 PetriNetUnfolderBase]: 4310/6334 cut-off events. [2024-06-27 19:38:14,812 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-27 19:38:14,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17797 conditions, 6334 events. 4310/6334 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36114 event pairs, 2266 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 17779. Up to 5934 conditions per place. [2024-06-27 19:38:14,846 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 61 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-27 19:38:14,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 494 flow [2024-06-27 19:38:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:38:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:38:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-27 19:38:14,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 19:38:14,848 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 246 flow. Second operand 4 states and 134 transitions. [2024-06-27 19:38:14,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 494 flow [2024-06-27 19:38:14,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 458 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:14,863 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 323 flow [2024-06-27 19:38:14,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-27 19:38:14,865 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-06-27 19:38:14,865 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 323 flow [2024-06-27 19:38:14,865 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) [2024-06-27 19:38:14,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:14,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:14,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:38:14,865 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)] === [2024-06-27 19:38:14,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1795643978, now seen corresponding path program 1 times [2024-06-27 19:38:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:14,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853838159] [2024-06-27 19:38:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:14,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853838159] [2024-06-27 19:38:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853838159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:15,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:15,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:38:15,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281459396] [2024-06-27 19:38:15,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:15,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:38:15,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:38:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:38:15,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:15,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 323 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) [2024-06-27 19:38:15,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:15,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:15,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:15,600 INFO L124 PetriNetUnfolderBase]: 5207/7676 cut-off events. [2024-06-27 19:38:15,600 INFO L125 PetriNetUnfolderBase]: For 11019/11281 co-relation queries the response was YES. [2024-06-27 19:38:15,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23680 conditions, 7676 events. 5207/7676 cut-off events. For 11019/11281 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44169 event pairs, 2250 based on Foata normal form. 57/7678 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-27 19:38:15,645 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 25 changer transitions 0/104 dead transitions. [2024-06-27 19:38:15,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 659 flow [2024-06-27 19:38:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 172 transitions. [2024-06-27 19:38:15,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6745098039215687 [2024-06-27 19:38:15,648 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 323 flow. Second operand 5 states and 172 transitions. [2024-06-27 19:38:15,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 659 flow [2024-06-27 19:38:15,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 651 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 19:38:15,658 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 436 flow [2024-06-27 19:38:15,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-27 19:38:15,663 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2024-06-27 19:38:15,663 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 436 flow [2024-06-27 19:38:15,663 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) [2024-06-27 19:38:15,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:15,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:15,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:38:15,664 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)] === [2024-06-27 19:38:15,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash 738796918, now seen corresponding path program 2 times [2024-06-27 19:38:15,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:15,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007847004] [2024-06-27 19:38:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:15,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:15,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:15,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007847004] [2024-06-27 19:38:15,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007847004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:15,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:15,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:38:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905923688] [2024-06-27 19:38:15,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:38:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:15,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:38:15,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:38:15,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:15,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 436 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) [2024-06-27 19:38:15,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:15,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:15,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:16,398 INFO L124 PetriNetUnfolderBase]: 5198/7664 cut-off events. [2024-06-27 19:38:16,398 INFO L125 PetriNetUnfolderBase]: For 17217/17499 co-relation queries the response was YES. [2024-06-27 19:38:16,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 7664 events. 5198/7664 cut-off events. For 17217/17499 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44083 event pairs, 2250 based on Foata normal form. 65/7676 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-27 19:38:16,449 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 60 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-27 19:38:16,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 652 flow [2024-06-27 19:38:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:38:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:38:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-06-27 19:38:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-27 19:38:16,450 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 436 flow. Second operand 4 states and 139 transitions. [2024-06-27 19:38:16,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 652 flow [2024-06-27 19:38:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 609 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 19:38:16,528 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 453 flow [2024-06-27 19:38:16,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 19:38:16,529 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-27 19:38:16,529 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 453 flow [2024-06-27 19:38:16,529 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) [2024-06-27 19:38:16,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:16,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:16,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:38:16,530 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)] === [2024-06-27 19:38:16,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 458586734, now seen corresponding path program 1 times [2024-06-27 19:38:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:16,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507527237] [2024-06-27 19:38:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:16,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:16,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507527237] [2024-06-27 19:38:16,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507527237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:16,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:16,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:38:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906659617] [2024-06-27 19:38:16,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:16,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:38:16,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:16,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:38:16,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:38:16,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:16,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 453 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) [2024-06-27 19:38:16,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:16,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:16,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:17,251 INFO L124 PetriNetUnfolderBase]: 4317/6352 cut-off events. [2024-06-27 19:38:17,252 INFO L125 PetriNetUnfolderBase]: For 15952/15988 co-relation queries the response was YES. [2024-06-27 19:38:17,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22022 conditions, 6352 events. 4317/6352 cut-off events. For 15952/15988 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36240 event pairs, 2074 based on Foata normal form. 19/6359 useless extension candidates. Maximal degree in co-relation 21997. Up to 5913 conditions per place. [2024-06-27 19:38:17,298 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 77 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-27 19:38:17,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 726 flow [2024-06-27 19:38:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-27 19:38:17,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6431372549019608 [2024-06-27 19:38:17,300 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 453 flow. Second operand 5 states and 164 transitions. [2024-06-27 19:38:17,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 726 flow [2024-06-27 19:38:17,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 102 transitions, 684 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:17,312 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 477 flow [2024-06-27 19:38:17,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=477, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 19:38:17,313 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 19 predicate places. [2024-06-27 19:38:17,313 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 477 flow [2024-06-27 19:38:17,313 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) [2024-06-27 19:38:17,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:17,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:17,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:38:17,314 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)] === [2024-06-27 19:38:17,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1080064308, now seen corresponding path program 1 times [2024-06-27 19:38:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:17,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222840921] [2024-06-27 19:38:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:17,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:17,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222840921] [2024-06-27 19:38:17,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222840921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:17,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:17,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632649753] [2024-06-27 19:38:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:17,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:17,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 477 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) [2024-06-27 19:38:17,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:17,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:17,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:18,025 INFO L124 PetriNetUnfolderBase]: 5487/8007 cut-off events. [2024-06-27 19:38:18,025 INFO L125 PetriNetUnfolderBase]: For 24555/24726 co-relation queries the response was YES. [2024-06-27 19:38:18,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 8007 events. 5487/8007 cut-off events. For 24555/24726 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45383 event pairs, 2351 based on Foata normal form. 40/8023 useless extension candidates. Maximal degree in co-relation 28791. Up to 7366 conditions per place. [2024-06-27 19:38:18,087 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 96 selfloop transitions, 27 changer transitions 0/133 dead transitions. [2024-06-27 19:38:18,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 993 flow [2024-06-27 19:38:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-27 19:38:18,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-27 19:38:18,089 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 477 flow. Second operand 6 states and 199 transitions. [2024-06-27 19:38:18,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 993 flow [2024-06-27 19:38:18,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 953 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:18,105 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 665 flow [2024-06-27 19:38:18,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=665, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2024-06-27 19:38:18,105 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-06-27 19:38:18,106 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 665 flow [2024-06-27 19:38:18,106 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) [2024-06-27 19:38:18,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:18,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:18,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:38:18,106 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)] === [2024-06-27 19:38:18,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1427875008, now seen corresponding path program 2 times [2024-06-27 19:38:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:18,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663684089] [2024-06-27 19:38:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:18,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663684089] [2024-06-27 19:38:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663684089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:18,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:18,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:18,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512170998] [2024-06-27 19:38:18,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:18,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:18,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:18,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:18,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:18,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 665 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) [2024-06-27 19:38:18,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:18,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:18,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:18,851 INFO L124 PetriNetUnfolderBase]: 5509/8053 cut-off events. [2024-06-27 19:38:18,851 INFO L125 PetriNetUnfolderBase]: For 32033/32350 co-relation queries the response was YES. [2024-06-27 19:38:18,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31088 conditions, 8053 events. 5509/8053 cut-off events. For 32033/32350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 45641 event pairs, 2329 based on Foata normal form. 81/8117 useless extension candidates. Maximal degree in co-relation 31059. Up to 7419 conditions per place. [2024-06-27 19:38:18,906 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 110 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-27 19:38:18,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 146 transitions, 1162 flow [2024-06-27 19:38:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:18,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-27 19:38:18,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-27 19:38:18,908 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 665 flow. Second operand 7 states and 227 transitions. [2024-06-27 19:38:18,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 146 transitions, 1162 flow [2024-06-27 19:38:18,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1108 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 19:38:18,930 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 741 flow [2024-06-27 19:38:18,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-27 19:38:18,931 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-27 19:38:18,931 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 741 flow [2024-06-27 19:38:18,931 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) [2024-06-27 19:38:18,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:18,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:18,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:38:18,932 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)] === [2024-06-27 19:38:18,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1427869428, now seen corresponding path program 3 times [2024-06-27 19:38:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:18,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943981017] [2024-06-27 19:38:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:19,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:19,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943981017] [2024-06-27 19:38:19,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943981017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:19,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:19,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072683272] [2024-06-27 19:38:19,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:19,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:19,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:19,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:19,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 741 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) [2024-06-27 19:38:19,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:19,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:19,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:19,684 INFO L124 PetriNetUnfolderBase]: 5500/8033 cut-off events. [2024-06-27 19:38:19,685 INFO L125 PetriNetUnfolderBase]: For 36437/36676 co-relation queries the response was YES. [2024-06-27 19:38:19,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31393 conditions, 8033 events. 5500/8033 cut-off events. For 36437/36676 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 45539 event pairs, 2351 based on Foata normal form. 65/8074 useless extension candidates. Maximal degree in co-relation 31362. Up to 7410 conditions per place. [2024-06-27 19:38:19,739 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 93 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-27 19:38:19,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1054 flow [2024-06-27 19:38:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-27 19:38:19,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549019607843137 [2024-06-27 19:38:19,740 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 741 flow. Second operand 5 states and 167 transitions. [2024-06-27 19:38:19,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1054 flow [2024-06-27 19:38:19,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 128 transitions, 962 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:19,779 INFO L231 Difference]: Finished difference. Result has 85 places, 99 transitions, 710 flow [2024-06-27 19:38:19,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=710, PETRI_PLACES=85, PETRI_TRANSITIONS=99} [2024-06-27 19:38:19,780 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-27 19:38:19,780 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 99 transitions, 710 flow [2024-06-27 19:38:19,780 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) [2024-06-27 19:38:19,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:19,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:19,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:38:19,781 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)] === [2024-06-27 19:38:19,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash -763144331, now seen corresponding path program 1 times [2024-06-27 19:38:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559913534] [2024-06-27 19:38:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:19,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559913534] [2024-06-27 19:38:19,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559913534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:19,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:19,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:38:19,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425517401] [2024-06-27 19:38:19,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:19,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:38:19,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:19,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:38:19,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:38:19,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:19,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 99 transitions, 710 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) [2024-06-27 19:38:19,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:19,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:19,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:20,371 INFO L124 PetriNetUnfolderBase]: 4998/7361 cut-off events. [2024-06-27 19:38:20,371 INFO L125 PetriNetUnfolderBase]: For 40862/40885 co-relation queries the response was YES. [2024-06-27 19:38:20,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29608 conditions, 7361 events. 4998/7361 cut-off events. For 40862/40885 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42808 event pairs, 2470 based on Foata normal form. 27/7357 useless extension candidates. Maximal degree in co-relation 29576. Up to 6752 conditions per place. [2024-06-27 19:38:20,418 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 98 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2024-06-27 19:38:20,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 127 transitions, 1082 flow [2024-06-27 19:38:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:38:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:38:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-27 19:38:20,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-27 19:38:20,420 INFO L175 Difference]: Start difference. First operand has 85 places, 99 transitions, 710 flow. Second operand 4 states and 130 transitions. [2024-06-27 19:38:20,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 127 transitions, 1082 flow [2024-06-27 19:38:20,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 1026 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:20,460 INFO L231 Difference]: Finished difference. Result has 86 places, 112 transitions, 833 flow [2024-06-27 19:38:20,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=833, PETRI_PLACES=86, PETRI_TRANSITIONS=112} [2024-06-27 19:38:20,460 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-06-27 19:38:20,460 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 112 transitions, 833 flow [2024-06-27 19:38:20,461 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) [2024-06-27 19:38:20,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:20,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:20,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:38:20,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:20,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash 960174645, now seen corresponding path program 1 times [2024-06-27 19:38:20,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:20,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111756372] [2024-06-27 19:38:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:20,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111756372] [2024-06-27 19:38:20,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111756372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:20,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:20,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:20,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998461533] [2024-06-27 19:38:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:20,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:20,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:20,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:20,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:20,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:20,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:21,262 INFO L124 PetriNetUnfolderBase]: 6095/8923 cut-off events. [2024-06-27 19:38:21,262 INFO L125 PetriNetUnfolderBase]: For 64984/65217 co-relation queries the response was YES. [2024-06-27 19:38:21,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39578 conditions, 8923 events. 6095/8923 cut-off events. For 64984/65217 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52107 event pairs, 1804 based on Foata normal form. 62/8746 useless extension candidates. Maximal degree in co-relation 39544. Up to 7908 conditions per place. [2024-06-27 19:38:21,322 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 49 changer transitions 0/158 dead transitions. [2024-06-27 19:38:21,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 158 transitions, 1339 flow [2024-06-27 19:38:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-06-27 19:38:21,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6633986928104575 [2024-06-27 19:38:21,324 INFO L175 Difference]: Start difference. First operand has 86 places, 112 transitions, 833 flow. Second operand 6 states and 203 transitions. [2024-06-27 19:38:21,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 158 transitions, 1339 flow [2024-06-27 19:38:21,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 158 transitions, 1329 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 19:38:21,388 INFO L231 Difference]: Finished difference. Result has 92 places, 118 transitions, 1005 flow [2024-06-27 19:38:21,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=92, PETRI_TRANSITIONS=118} [2024-06-27 19:38:21,388 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-27 19:38:21,388 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 118 transitions, 1005 flow [2024-06-27 19:38:21,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:21,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:21,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:21,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:38:21,389 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:21,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:21,389 INFO L85 PathProgramCache]: Analyzing trace with hash -877748299, now seen corresponding path program 2 times [2024-06-27 19:38:21,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:21,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283890328] [2024-06-27 19:38:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:21,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283890328] [2024-06-27 19:38:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283890328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:21,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:21,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:21,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446604813] [2024-06-27 19:38:21,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:21,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:21,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:21,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 118 transitions, 1005 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:21,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:21,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:21,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:22,306 INFO L124 PetriNetUnfolderBase]: 6167/9016 cut-off events. [2024-06-27 19:38:22,306 INFO L125 PetriNetUnfolderBase]: For 82163/82469 co-relation queries the response was YES. [2024-06-27 19:38:22,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42538 conditions, 9016 events. 6167/9016 cut-off events. For 82163/82469 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52672 event pairs, 2204 based on Foata normal form. 75/8849 useless extension candidates. Maximal degree in co-relation 42501. Up to 8137 conditions per place. [2024-06-27 19:38:22,372 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 91 selfloop transitions, 45 changer transitions 0/157 dead transitions. [2024-06-27 19:38:22,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 157 transitions, 1409 flow [2024-06-27 19:38:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-27 19:38:22,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6503267973856209 [2024-06-27 19:38:22,374 INFO L175 Difference]: Start difference. First operand has 92 places, 118 transitions, 1005 flow. Second operand 6 states and 199 transitions. [2024-06-27 19:38:22,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 157 transitions, 1409 flow [2024-06-27 19:38:22,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1325 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 19:38:22,453 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1068 flow [2024-06-27 19:38:22,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1068, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-27 19:38:22,454 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-27 19:38:22,454 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1068 flow [2024-06-27 19:38:22,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:22,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:22,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:38:22,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:22,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1314275829, now seen corresponding path program 3 times [2024-06-27 19:38:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:22,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161594410] [2024-06-27 19:38:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:22,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:22,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:22,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161594410] [2024-06-27 19:38:22,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161594410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:22,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:22,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:22,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222422808] [2024-06-27 19:38:22,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:22,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:22,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1068 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:22,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:22,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:22,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:23,422 INFO L124 PetriNetUnfolderBase]: 6133/8979 cut-off events. [2024-06-27 19:38:23,423 INFO L125 PetriNetUnfolderBase]: For 89869/90141 co-relation queries the response was YES. [2024-06-27 19:38:23,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42958 conditions, 8979 events. 6133/8979 cut-off events. For 89869/90141 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52379 event pairs, 1794 based on Foata normal form. 108/8850 useless extension candidates. Maximal degree in co-relation 42919. Up to 8052 conditions per place. [2024-06-27 19:38:23,482 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 88 selfloop transitions, 41 changer transitions 0/150 dead transitions. [2024-06-27 19:38:23,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 150 transitions, 1400 flow [2024-06-27 19:38:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-06-27 19:38:23,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:38:23,483 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1068 flow. Second operand 5 states and 170 transitions. [2024-06-27 19:38:23,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 150 transitions, 1400 flow [2024-06-27 19:38:23,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1283 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:23,571 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1049 flow [2024-06-27 19:38:23,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1049, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2024-06-27 19:38:23,571 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-27 19:38:23,571 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1049 flow [2024-06-27 19:38:23,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:23,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:23,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:23,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:38:23,571 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:23,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1528957803, now seen corresponding path program 1 times [2024-06-27 19:38:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:23,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106991023] [2024-06-27 19:38:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106991023] [2024-06-27 19:38:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106991023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:23,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:23,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:23,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696650408] [2024-06-27 19:38:23,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:23,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:23,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:23,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:23,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1049 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:23,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:23,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:23,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:24,494 INFO L124 PetriNetUnfolderBase]: 6715/9772 cut-off events. [2024-06-27 19:38:24,494 INFO L125 PetriNetUnfolderBase]: For 94949/95245 co-relation queries the response was YES. [2024-06-27 19:38:24,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45970 conditions, 9772 events. 6715/9772 cut-off events. For 94949/95245 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56618 event pairs, 1908 based on Foata normal form. 117/9841 useless extension candidates. Maximal degree in co-relation 45930. Up to 8482 conditions per place. [2024-06-27 19:38:24,558 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 133 selfloop transitions, 43 changer transitions 0/188 dead transitions. [2024-06-27 19:38:24,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 188 transitions, 1759 flow [2024-06-27 19:38:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-27 19:38:24,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-27 19:38:24,560 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1049 flow. Second operand 7 states and 233 transitions. [2024-06-27 19:38:24,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 188 transitions, 1759 flow [2024-06-27 19:38:24,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 1652 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:24,649 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1189 flow [2024-06-27 19:38:24,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-27 19:38:24,649 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-06-27 19:38:24,649 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1189 flow [2024-06-27 19:38:24,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:24,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:24,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:24,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:38:24,650 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:24,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1440392043, now seen corresponding path program 2 times [2024-06-27 19:38:24,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:24,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105526794] [2024-06-27 19:38:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:24,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:24,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:24,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105526794] [2024-06-27 19:38:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105526794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:24,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68486154] [2024-06-27 19:38:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:24,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:24,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:24,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1189 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:24,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:24,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:24,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:25,777 INFO L124 PetriNetUnfolderBase]: 6989/10198 cut-off events. [2024-06-27 19:38:25,777 INFO L125 PetriNetUnfolderBase]: For 112749/113103 co-relation queries the response was YES. [2024-06-27 19:38:25,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49943 conditions, 10198 events. 6989/10198 cut-off events. For 112749/113103 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59767 event pairs, 2353 based on Foata normal form. 127/10277 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-27 19:38:25,843 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 139 selfloop transitions, 39 changer transitions 0/190 dead transitions. [2024-06-27 19:38:25,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 190 transitions, 1845 flow [2024-06-27 19:38:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-06-27 19:38:25,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526610644257703 [2024-06-27 19:38:25,844 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1189 flow. Second operand 7 states and 233 transitions. [2024-06-27 19:38:25,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 190 transitions, 1845 flow [2024-06-27 19:38:25,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 190 transitions, 1786 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:38:25,934 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1295 flow [2024-06-27 19:38:25,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1295, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-27 19:38:25,935 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-27 19:38:25,935 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1295 flow [2024-06-27 19:38:25,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:25,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:25,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:25,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:38:25,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:25,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -625968093, now seen corresponding path program 3 times [2024-06-27 19:38:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:25,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159710263] [2024-06-27 19:38:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:25,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:26,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159710263] [2024-06-27 19:38:26,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159710263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:26,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:26,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822557468] [2024-06-27 19:38:26,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:26,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:26,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:26,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:26,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:26,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:26,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1295 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:26,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:26,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:26,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:26,995 INFO L124 PetriNetUnfolderBase]: 6935/10120 cut-off events. [2024-06-27 19:38:26,995 INFO L125 PetriNetUnfolderBase]: For 122442/122792 co-relation queries the response was YES. [2024-06-27 19:38:27,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50414 conditions, 10120 events. 6935/10120 cut-off events. For 122442/122792 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59132 event pairs, 2358 based on Foata normal form. 133/10205 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-27 19:38:27,066 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 137 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-27 19:38:27,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 185 transitions, 1784 flow [2024-06-27 19:38:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-27 19:38:27,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358543417366946 [2024-06-27 19:38:27,068 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1295 flow. Second operand 7 states and 227 transitions. [2024-06-27 19:38:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 185 transitions, 1784 flow [2024-06-27 19:38:27,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 1715 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:27,218 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1322 flow [2024-06-27 19:38:27,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-27 19:38:27,218 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-27 19:38:27,218 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1322 flow [2024-06-27 19:38:27,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:27,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:27,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:27,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:38:27,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:27,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2093356735, now seen corresponding path program 4 times [2024-06-27 19:38:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:27,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622855709] [2024-06-27 19:38:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:27,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:27,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622855709] [2024-06-27 19:38:27,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622855709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:27,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:27,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289527292] [2024-06-27 19:38:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:27,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:27,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:27,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:27,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:27,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:27,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:28,310 INFO L124 PetriNetUnfolderBase]: 6968/10191 cut-off events. [2024-06-27 19:38:28,311 INFO L125 PetriNetUnfolderBase]: For 131117/131479 co-relation queries the response was YES. [2024-06-27 19:38:28,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51080 conditions, 10191 events. 6968/10191 cut-off events. For 131117/131479 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59612 event pairs, 2338 based on Foata normal form. 142/10295 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-27 19:38:28,383 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 152 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-27 19:38:28,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 195 transitions, 1873 flow [2024-06-27 19:38:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:28,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:28,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 255 transitions. [2024-06-27 19:38:28,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:38:28,385 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1322 flow. Second operand 8 states and 255 transitions. [2024-06-27 19:38:28,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 195 transitions, 1873 flow [2024-06-27 19:38:28,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 1801 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:28,524 INFO L231 Difference]: Finished difference. Result has 115 places, 140 transitions, 1360 flow [2024-06-27 19:38:28,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=115, PETRI_TRANSITIONS=140} [2024-06-27 19:38:28,525 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-27 19:38:28,525 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 140 transitions, 1360 flow [2024-06-27 19:38:28,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:28,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:28,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:28,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:38:28,525 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:28,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2087850205, now seen corresponding path program 5 times [2024-06-27 19:38:28,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:28,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341165050] [2024-06-27 19:38:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:28,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:28,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:28,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341165050] [2024-06-27 19:38:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341165050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:28,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099805275] [2024-06-27 19:38:28,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:28,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:28,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:28,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 140 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:28,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:28,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:28,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:29,680 INFO L124 PetriNetUnfolderBase]: 7114/10415 cut-off events. [2024-06-27 19:38:29,680 INFO L125 PetriNetUnfolderBase]: For 145226/145580 co-relation queries the response was YES. [2024-06-27 19:38:29,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53030 conditions, 10415 events. 7114/10415 cut-off events. For 145226/145580 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61253 event pairs, 2394 based on Foata normal form. 127/10496 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-27 19:38:29,751 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 141 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-27 19:38:29,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 182 transitions, 1851 flow [2024-06-27 19:38:29,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-27 19:38:29,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 19:38:29,752 INFO L175 Difference]: Start difference. First operand has 115 places, 140 transitions, 1360 flow. Second operand 6 states and 198 transitions. [2024-06-27 19:38:29,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 182 transitions, 1851 flow [2024-06-27 19:38:29,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 182 transitions, 1779 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:29,902 INFO L231 Difference]: Finished difference. Result has 115 places, 142 transitions, 1398 flow [2024-06-27 19:38:29,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=115, PETRI_TRANSITIONS=142} [2024-06-27 19:38:29,903 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 61 predicate places. [2024-06-27 19:38:29,903 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 142 transitions, 1398 flow [2024-06-27 19:38:29,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:29,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:29,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:29,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:38:29,904 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:29,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2087846485, now seen corresponding path program 6 times [2024-06-27 19:38:29,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:29,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835152875] [2024-06-27 19:38:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:30,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:30,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835152875] [2024-06-27 19:38:30,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835152875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:30,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:30,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:30,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190303967] [2024-06-27 19:38:30,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:30,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:30,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:30,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:30,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:30,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 142 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:30,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:30,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:30,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:31,069 INFO L124 PetriNetUnfolderBase]: 7075/10354 cut-off events. [2024-06-27 19:38:31,069 INFO L125 PetriNetUnfolderBase]: For 152801/153157 co-relation queries the response was YES. [2024-06-27 19:38:31,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52976 conditions, 10354 events. 7075/10354 cut-off events. For 152801/153157 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60771 event pairs, 1958 based on Foata normal form. 141/10449 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-27 19:38:31,155 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2024-06-27 19:38:31,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 187 transitions, 1891 flow [2024-06-27 19:38:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 201 transitions. [2024-06-27 19:38:31,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 19:38:31,156 INFO L175 Difference]: Start difference. First operand has 115 places, 142 transitions, 1398 flow. Second operand 6 states and 201 transitions. [2024-06-27 19:38:31,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 187 transitions, 1891 flow [2024-06-27 19:38:31,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1809 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:31,476 INFO L231 Difference]: Finished difference. Result has 118 places, 144 transitions, 1436 flow [2024-06-27 19:38:31,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=118, PETRI_TRANSITIONS=144} [2024-06-27 19:38:31,477 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-27 19:38:31,477 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 144 transitions, 1436 flow [2024-06-27 19:38:31,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:31,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:31,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:31,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:38:31,478 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:31,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2093571937, now seen corresponding path program 1 times [2024-06-27 19:38:31,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:31,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717771925] [2024-06-27 19:38:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:31,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717771925] [2024-06-27 19:38:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717771925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:31,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:31,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258402823] [2024-06-27 19:38:31,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:31,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:31,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:31,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:31,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 144 transitions, 1436 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:31,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:31,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:31,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:32,732 INFO L124 PetriNetUnfolderBase]: 6967/10208 cut-off events. [2024-06-27 19:38:32,732 INFO L125 PetriNetUnfolderBase]: For 159710/160054 co-relation queries the response was YES. [2024-06-27 19:38:32,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52527 conditions, 10208 events. 6967/10208 cut-off events. For 159710/160054 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59815 event pairs, 2179 based on Foata normal form. 144/10314 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-27 19:38:32,828 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 154 selfloop transitions, 38 changer transitions 0/204 dead transitions. [2024-06-27 19:38:32,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 204 transitions, 1973 flow [2024-06-27 19:38:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-27 19:38:32,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-27 19:38:32,829 INFO L175 Difference]: Start difference. First operand has 118 places, 144 transitions, 1436 flow. Second operand 8 states and 257 transitions. [2024-06-27 19:38:32,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 204 transitions, 1973 flow [2024-06-27 19:38:33,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 1838 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:33,069 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1376 flow [2024-06-27 19:38:33,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-27 19:38:33,070 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-06-27 19:38:33,070 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1376 flow [2024-06-27 19:38:33,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:33,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:33,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:33,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:38:33,070 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:33,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -211475054, now seen corresponding path program 1 times [2024-06-27 19:38:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538039598] [2024-06-27 19:38:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:33,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538039598] [2024-06-27 19:38:33,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538039598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:33,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:33,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:38:33,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512042398] [2024-06-27 19:38:33,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:33,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:38:33,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:33,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:38:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:38:33,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:33,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1376 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) [2024-06-27 19:38:33,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:33,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:33,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:33,920 INFO L124 PetriNetUnfolderBase]: 5676/8388 cut-off events. [2024-06-27 19:38:33,920 INFO L125 PetriNetUnfolderBase]: For 138569/138811 co-relation queries the response was YES. [2024-06-27 19:38:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44550 conditions, 8388 events. 5676/8388 cut-off events. For 138569/138811 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49270 event pairs, 2029 based on Foata normal form. 32/8394 useless extension candidates. Maximal degree in co-relation 44498. Up to 7824 conditions per place. [2024-06-27 19:38:33,988 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 130 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2024-06-27 19:38:33,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 176 transitions, 1944 flow [2024-06-27 19:38:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 19:38:33,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-06-27 19:38:33,989 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1376 flow. Second operand 5 states and 163 transitions. [2024-06-27 19:38:33,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 176 transitions, 1944 flow [2024-06-27 19:38:34,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1855 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:34,121 INFO L231 Difference]: Finished difference. Result has 119 places, 153 transitions, 1470 flow [2024-06-27 19:38:34,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1470, PETRI_PLACES=119, PETRI_TRANSITIONS=153} [2024-06-27 19:38:34,122 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-27 19:38:34,122 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 153 transitions, 1470 flow [2024-06-27 19:38:34,122 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) [2024-06-27 19:38:34,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:34,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:34,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:38:34,122 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:34,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -210490184, now seen corresponding path program 2 times [2024-06-27 19:38:34,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:34,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16032575] [2024-06-27 19:38:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:34,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:34,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:34,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16032575] [2024-06-27 19:38:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16032575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:34,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:38:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807889829] [2024-06-27 19:38:34,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:34,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:38:34,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:34,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:38:34,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:38:34,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:34,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 153 transitions, 1470 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) [2024-06-27 19:38:34,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:34,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:34,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:34,980 INFO L124 PetriNetUnfolderBase]: 5669/8371 cut-off events. [2024-06-27 19:38:34,980 INFO L125 PetriNetUnfolderBase]: For 154303/154559 co-relation queries the response was YES. [2024-06-27 19:38:35,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46122 conditions, 8371 events. 5669/8371 cut-off events. For 154303/154559 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49122 event pairs, 2029 based on Foata normal form. 34/8380 useless extension candidates. Maximal degree in co-relation 46069. Up to 7826 conditions per place. [2024-06-27 19:38:35,045 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 128 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-06-27 19:38:35,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 170 transitions, 1828 flow [2024-06-27 19:38:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:38:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:38:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-27 19:38:35,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 19:38:35,046 INFO L175 Difference]: Start difference. First operand has 119 places, 153 transitions, 1470 flow. Second operand 4 states and 134 transitions. [2024-06-27 19:38:35,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 170 transitions, 1828 flow [2024-06-27 19:38:35,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 170 transitions, 1735 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-27 19:38:35,213 INFO L231 Difference]: Finished difference. Result has 122 places, 153 transitions, 1451 flow [2024-06-27 19:38:35,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1451, PETRI_PLACES=122, PETRI_TRANSITIONS=153} [2024-06-27 19:38:35,214 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-27 19:38:35,214 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 153 transitions, 1451 flow [2024-06-27 19:38:35,214 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) [2024-06-27 19:38:35,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:35,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:35,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:38:35,215 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:35,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1999758960, now seen corresponding path program 1 times [2024-06-27 19:38:35,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:35,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073376979] [2024-06-27 19:38:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:35,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073376979] [2024-06-27 19:38:35,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073376979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:35,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:35,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:38:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694785827] [2024-06-27 19:38:35,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:35,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:38:35,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:38:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:38:35,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:35,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 153 transitions, 1451 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) [2024-06-27 19:38:35,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:35,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:35,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:36,078 INFO L124 PetriNetUnfolderBase]: 5840/8643 cut-off events. [2024-06-27 19:38:36,078 INFO L125 PetriNetUnfolderBase]: For 160704/160759 co-relation queries the response was YES. [2024-06-27 19:38:36,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45627 conditions, 8643 events. 5840/8643 cut-off events. For 160704/160759 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 51313 event pairs, 2282 based on Foata normal form. 63/8679 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-27 19:38:36,149 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 143 selfloop transitions, 17 changer transitions 0/176 dead transitions. [2024-06-27 19:38:36,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 176 transitions, 1851 flow [2024-06-27 19:38:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-27 19:38:36,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611764705882353 [2024-06-27 19:38:36,151 INFO L175 Difference]: Start difference. First operand has 122 places, 153 transitions, 1451 flow. Second operand 5 states and 156 transitions. [2024-06-27 19:38:36,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 176 transitions, 1851 flow [2024-06-27 19:38:36,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1793 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:36,306 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1467 flow [2024-06-27 19:38:36,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1467, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-06-27 19:38:36,307 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2024-06-27 19:38:36,307 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1467 flow [2024-06-27 19:38:36,307 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) [2024-06-27 19:38:36,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:36,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:36,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:38:36,307 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)] === [2024-06-27 19:38:36,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2144125132, now seen corresponding path program 1 times [2024-06-27 19:38:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882477363] [2024-06-27 19:38:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:36,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:36,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882477363] [2024-06-27 19:38:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882477363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:36,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323600740] [2024-06-27 19:38:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:36,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:36,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:38:36,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1467 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:36,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:36,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:38:36,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:37,468 INFO L124 PetriNetUnfolderBase]: 7463/10908 cut-off events. [2024-06-27 19:38:37,468 INFO L125 PetriNetUnfolderBase]: For 207787/207797 co-relation queries the response was YES. [2024-06-27 19:38:37,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57860 conditions, 10908 events. 7463/10908 cut-off events. For 207787/207797 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63724 event pairs, 2649 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 57804. Up to 10181 conditions per place. [2024-06-27 19:38:37,553 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 177 selfloop transitions, 26 changer transitions 0/212 dead transitions. [2024-06-27 19:38:37,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2255 flow [2024-06-27 19:38:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 19:38:37,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-06-27 19:38:37,554 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1467 flow. Second operand 6 states and 185 transitions. [2024-06-27 19:38:37,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2255 flow [2024-06-27 19:38:37,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2198 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:37,820 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 1720 flow [2024-06-27 19:38:37,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1720, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2024-06-27 19:38:37,820 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-27 19:38:37,820 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 1720 flow [2024-06-27 19:38:37,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:37,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:37,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:37,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:38:37,821 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)] === [2024-06-27 19:38:37,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash 3712110, now seen corresponding path program 2 times [2024-06-27 19:38:37,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:37,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116717808] [2024-06-27 19:38:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:37,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:37,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:37,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116717808] [2024-06-27 19:38:37,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116717808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:37,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:37,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504551824] [2024-06-27 19:38:37,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:37,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:37,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:37,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:37,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:38:37,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 1720 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:37,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:37,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:38:37,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:38,923 INFO L124 PetriNetUnfolderBase]: 7479/10932 cut-off events. [2024-06-27 19:38:38,924 INFO L125 PetriNetUnfolderBase]: For 226157/226173 co-relation queries the response was YES. [2024-06-27 19:38:38,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60283 conditions, 10932 events. 7479/10932 cut-off events. For 226157/226173 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63918 event pairs, 2654 based on Foata normal form. 9/10937 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-27 19:38:39,018 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 169 selfloop transitions, 30 changer transitions 0/208 dead transitions. [2024-06-27 19:38:39,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 208 transitions, 2334 flow [2024-06-27 19:38:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-27 19:38:39,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6039215686274509 [2024-06-27 19:38:39,020 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 1720 flow. Second operand 5 states and 154 transitions. [2024-06-27 19:38:39,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 208 transitions, 2334 flow [2024-06-27 19:38:39,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 208 transitions, 2302 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-27 19:38:39,274 INFO L231 Difference]: Finished difference. Result has 136 places, 185 transitions, 1829 flow [2024-06-27 19:38:39,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1829, PETRI_PLACES=136, PETRI_TRANSITIONS=185} [2024-06-27 19:38:39,275 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-06-27 19:38:39,275 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 185 transitions, 1829 flow [2024-06-27 19:38:39,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:39,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:39,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:39,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:38:39,276 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)] === [2024-06-27 19:38:39,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash 3700950, now seen corresponding path program 3 times [2024-06-27 19:38:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:39,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935611794] [2024-06-27 19:38:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:39,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:39,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:39,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935611794] [2024-06-27 19:38:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935611794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:39,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:39,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:39,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329651856] [2024-06-27 19:38:39,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:39,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:39,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:39,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:39,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:38:39,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 185 transitions, 1829 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:39,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:39,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:38:39,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:40,454 INFO L124 PetriNetUnfolderBase]: 7472/10925 cut-off events. [2024-06-27 19:38:40,455 INFO L125 PetriNetUnfolderBase]: For 241100/241120 co-relation queries the response was YES. [2024-06-27 19:38:40,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61037 conditions, 10925 events. 7472/10925 cut-off events. For 241100/241120 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63760 event pairs, 2649 based on Foata normal form. 18/10938 useless extension candidates. Maximal degree in co-relation 60973. Up to 10191 conditions per place. [2024-06-27 19:38:40,539 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 171 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-27 19:38:40,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 211 transitions, 2303 flow [2024-06-27 19:38:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-27 19:38:40,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6196078431372549 [2024-06-27 19:38:40,540 INFO L175 Difference]: Start difference. First operand has 136 places, 185 transitions, 1829 flow. Second operand 5 states and 158 transitions. [2024-06-27 19:38:40,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 211 transitions, 2303 flow [2024-06-27 19:38:40,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 211 transitions, 2243 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 19:38:40,850 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 1845 flow [2024-06-27 19:38:40,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1845, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-06-27 19:38:40,851 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-27 19:38:40,851 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 1845 flow [2024-06-27 19:38:40,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:40,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:40,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:40,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:38:40,852 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)] === [2024-06-27 19:38:40,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:40,852 INFO L85 PathProgramCache]: Analyzing trace with hash -936754310, now seen corresponding path program 1 times [2024-06-27 19:38:40,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:40,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742210261] [2024-06-27 19:38:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:40,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:40,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742210261] [2024-06-27 19:38:40,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742210261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:40,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:40,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625600663] [2024-06-27 19:38:40,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:40,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:41,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:41,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 1845 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) [2024-06-27 19:38:41,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:41,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:41,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:41,882 INFO L124 PetriNetUnfolderBase]: 6148/8990 cut-off events. [2024-06-27 19:38:41,882 INFO L125 PetriNetUnfolderBase]: For 216254/216258 co-relation queries the response was YES. [2024-06-27 19:38:41,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51951 conditions, 8990 events. 6148/8990 cut-off events. For 216254/216258 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51752 event pairs, 2307 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 51885. Up to 8422 conditions per place. [2024-06-27 19:38:41,963 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 188 selfloop transitions, 33 changer transitions 0/231 dead transitions. [2024-06-27 19:38:41,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 231 transitions, 2616 flow [2024-06-27 19:38:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 19:38:41,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 19:38:41,968 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 1845 flow. Second operand 6 states and 187 transitions. [2024-06-27 19:38:41,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 231 transitions, 2616 flow [2024-06-27 19:38:42,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 231 transitions, 2568 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:42,203 INFO L231 Difference]: Finished difference. Result has 145 places, 202 transitions, 2059 flow [2024-06-27 19:38:42,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2059, PETRI_PLACES=145, PETRI_TRANSITIONS=202} [2024-06-27 19:38:42,203 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 91 predicate places. [2024-06-27 19:38:42,203 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 202 transitions, 2059 flow [2024-06-27 19:38:42,204 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) [2024-06-27 19:38:42,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:42,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:42,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:38:42,204 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)] === [2024-06-27 19:38:42,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:42,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2064740794, now seen corresponding path program 2 times [2024-06-27 19:38:42,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:42,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710760957] [2024-06-27 19:38:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:42,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:42,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710760957] [2024-06-27 19:38:42,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710760957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:42,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:42,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:42,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175390551] [2024-06-27 19:38:42,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:42,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:42,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:42,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:42,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 202 transitions, 2059 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) [2024-06-27 19:38:42,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:42,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:42,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:43,284 INFO L124 PetriNetUnfolderBase]: 6164/9016 cut-off events. [2024-06-27 19:38:43,284 INFO L125 PetriNetUnfolderBase]: For 221429/221435 co-relation queries the response was YES. [2024-06-27 19:38:43,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53712 conditions, 9016 events. 6164/9016 cut-off events. For 221429/221435 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51950 event pairs, 2307 based on Foata normal form. 8/9020 useless extension candidates. Maximal degree in co-relation 53644. Up to 8457 conditions per place. [2024-06-27 19:38:43,355 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 191 selfloop transitions, 30 changer transitions 0/231 dead transitions. [2024-06-27 19:38:43,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 231 transitions, 2726 flow [2024-06-27 19:38:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-27 19:38:43,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313725490196078 [2024-06-27 19:38:43,356 INFO L175 Difference]: Start difference. First operand has 145 places, 202 transitions, 2059 flow. Second operand 5 states and 161 transitions. [2024-06-27 19:38:43,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 231 transitions, 2726 flow [2024-06-27 19:38:43,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 231 transitions, 2646 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 19:38:43,612 INFO L231 Difference]: Finished difference. Result has 149 places, 207 transitions, 2116 flow [2024-06-27 19:38:43,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2116, PETRI_PLACES=149, PETRI_TRANSITIONS=207} [2024-06-27 19:38:43,613 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-27 19:38:43,613 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 207 transitions, 2116 flow [2024-06-27 19:38:43,613 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) [2024-06-27 19:38:43,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:43,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:43,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:38:43,614 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)] === [2024-06-27 19:38:43,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2064746374, now seen corresponding path program 3 times [2024-06-27 19:38:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:43,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051496055] [2024-06-27 19:38:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:43,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:43,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:43,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051496055] [2024-06-27 19:38:43,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051496055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:43,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:43,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566881479] [2024-06-27 19:38:43,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:43,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:43,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:43,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:43,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:43,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:43,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 207 transitions, 2116 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) [2024-06-27 19:38:43,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:43,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:44,656 INFO L124 PetriNetUnfolderBase]: 6157/9008 cut-off events. [2024-06-27 19:38:44,656 INFO L125 PetriNetUnfolderBase]: For 233071/233079 co-relation queries the response was YES. [2024-06-27 19:38:44,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53823 conditions, 9008 events. 6157/9008 cut-off events. For 233071/233079 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51964 event pairs, 2299 based on Foata normal form. 10/9015 useless extension candidates. Maximal degree in co-relation 53753. Up to 8450 conditions per place. [2024-06-27 19:38:44,734 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 195 selfloop transitions, 33 changer transitions 0/238 dead transitions. [2024-06-27 19:38:44,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 238 transitions, 2662 flow [2024-06-27 19:38:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 19:38:44,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 19:38:44,735 INFO L175 Difference]: Start difference. First operand has 149 places, 207 transitions, 2116 flow. Second operand 7 states and 210 transitions. [2024-06-27 19:38:44,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 238 transitions, 2662 flow [2024-06-27 19:38:45,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 238 transitions, 2566 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:45,012 INFO L231 Difference]: Finished difference. Result has 153 places, 208 transitions, 2105 flow [2024-06-27 19:38:45,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2105, PETRI_PLACES=153, PETRI_TRANSITIONS=208} [2024-06-27 19:38:45,013 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-27 19:38:45,013 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 208 transitions, 2105 flow [2024-06-27 19:38:45,013 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) [2024-06-27 19:38:45,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:45,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:45,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:38:45,013 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:45,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1689405949, now seen corresponding path program 1 times [2024-06-27 19:38:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562292516] [2024-06-27 19:38:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:45,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:45,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:45,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562292516] [2024-06-27 19:38:45,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562292516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:45,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:38:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157722204] [2024-06-27 19:38:45,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:38:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:38:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:38:45,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 208 transitions, 2105 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) [2024-06-27 19:38:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:46,232 INFO L124 PetriNetUnfolderBase]: 6897/10157 cut-off events. [2024-06-27 19:38:46,232 INFO L125 PetriNetUnfolderBase]: For 318619/318786 co-relation queries the response was YES. [2024-06-27 19:38:46,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62405 conditions, 10157 events. 6897/10157 cut-off events. For 318619/318786 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 60290 event pairs, 2392 based on Foata normal form. 45/9977 useless extension candidates. Maximal degree in co-relation 62334. Up to 9062 conditions per place. [2024-06-27 19:38:46,334 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 176 selfloop transitions, 18 changer transitions 0/238 dead transitions. [2024-06-27 19:38:46,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 238 transitions, 2743 flow [2024-06-27 19:38:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:38:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:38:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-27 19:38:46,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-06-27 19:38:46,335 INFO L175 Difference]: Start difference. First operand has 153 places, 208 transitions, 2105 flow. Second operand 4 states and 125 transitions. [2024-06-27 19:38:46,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 238 transitions, 2743 flow [2024-06-27 19:38:46,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 2655 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:46,662 INFO L231 Difference]: Finished difference. Result has 153 places, 225 transitions, 2314 flow [2024-06-27 19:38:46,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2314, PETRI_PLACES=153, PETRI_TRANSITIONS=225} [2024-06-27 19:38:46,663 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-27 19:38:46,663 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 225 transitions, 2314 flow [2024-06-27 19:38:46,663 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) [2024-06-27 19:38:46,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:46,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:46,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:38:46,664 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)] === [2024-06-27 19:38:46,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash 244224183, now seen corresponding path program 1 times [2024-06-27 19:38:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:46,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254005009] [2024-06-27 19:38:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:46,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254005009] [2024-06-27 19:38:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254005009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:46,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:46,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18023809] [2024-06-27 19:38:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:46,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:46,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:46,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:46,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:46,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:46,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 225 transitions, 2314 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:46,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:46,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:46,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:48,027 INFO L124 PetriNetUnfolderBase]: 6790/10087 cut-off events. [2024-06-27 19:38:48,027 INFO L125 PetriNetUnfolderBase]: For 343108/343678 co-relation queries the response was YES. [2024-06-27 19:38:48,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65955 conditions, 10087 events. 6790/10087 cut-off events. For 343108/343678 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60430 event pairs, 2033 based on Foata normal form. 73/9793 useless extension candidates. Maximal degree in co-relation 65882. Up to 8986 conditions per place. [2024-06-27 19:38:48,132 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 174 selfloop transitions, 61 changer transitions 0/263 dead transitions. [2024-06-27 19:38:48,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 263 transitions, 3094 flow [2024-06-27 19:38:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-27 19:38:48,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339869281045751 [2024-06-27 19:38:48,133 INFO L175 Difference]: Start difference. First operand has 153 places, 225 transitions, 2314 flow. Second operand 6 states and 194 transitions. [2024-06-27 19:38:48,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 263 transitions, 3094 flow [2024-06-27 19:38:48,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 263 transitions, 3074 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 19:38:48,545 INFO L231 Difference]: Finished difference. Result has 159 places, 231 transitions, 2542 flow [2024-06-27 19:38:48,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2542, PETRI_PLACES=159, PETRI_TRANSITIONS=231} [2024-06-27 19:38:48,545 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 105 predicate places. [2024-06-27 19:38:48,546 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 231 transitions, 2542 flow [2024-06-27 19:38:48,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:48,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:48,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:48,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:38:48,546 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)] === [2024-06-27 19:38:48,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash 247081143, now seen corresponding path program 2 times [2024-06-27 19:38:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:48,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819369685] [2024-06-27 19:38:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819369685] [2024-06-27 19:38:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819369685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:48,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685140487] [2024-06-27 19:38:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:48,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:48,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 231 transitions, 2542 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:48,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:48,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:48,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:49,781 INFO L124 PetriNetUnfolderBase]: 6833/10150 cut-off events. [2024-06-27 19:38:49,781 INFO L125 PetriNetUnfolderBase]: For 373165/373803 co-relation queries the response was YES. [2024-06-27 19:38:49,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68476 conditions, 10150 events. 6833/10150 cut-off events. For 373165/373803 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 60935 event pairs, 2203 based on Foata normal form. 58/9833 useless extension candidates. Maximal degree in co-relation 68400. Up to 9189 conditions per place. [2024-06-27 19:38:50,034 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 175 selfloop transitions, 57 changer transitions 0/260 dead transitions. [2024-06-27 19:38:50,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 260 transitions, 3134 flow [2024-06-27 19:38:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:38:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:38:50,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-27 19:38:50,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143790849673203 [2024-06-27 19:38:50,035 INFO L175 Difference]: Start difference. First operand has 159 places, 231 transitions, 2542 flow. Second operand 6 states and 188 transitions. [2024-06-27 19:38:50,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 260 transitions, 3134 flow [2024-06-27 19:38:50,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 260 transitions, 2992 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 19:38:50,402 INFO L231 Difference]: Finished difference. Result has 163 places, 234 transitions, 2591 flow [2024-06-27 19:38:50,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2591, PETRI_PLACES=163, PETRI_TRANSITIONS=234} [2024-06-27 19:38:50,403 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-06-27 19:38:50,403 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 234 transitions, 2591 flow [2024-06-27 19:38:50,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:50,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:50,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:50,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:38:50,404 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)] === [2024-06-27 19:38:50,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash -417547849, now seen corresponding path program 3 times [2024-06-27 19:38:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:50,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913914364] [2024-06-27 19:38:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:50,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:50,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913914364] [2024-06-27 19:38:50,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913914364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:50,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:50,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:50,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330780164] [2024-06-27 19:38:50,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:50,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:50,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:50,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:50,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:50,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:38:50,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 234 transitions, 2591 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:50,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:50,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:38:50,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:51,679 INFO L124 PetriNetUnfolderBase]: 6808/10117 cut-off events. [2024-06-27 19:38:51,679 INFO L125 PetriNetUnfolderBase]: For 387415/388045 co-relation queries the response was YES. [2024-06-27 19:38:51,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68334 conditions, 10117 events. 6808/10117 cut-off events. For 387415/388045 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 60573 event pairs, 2023 based on Foata normal form. 84/9830 useless extension candidates. Maximal degree in co-relation 68256. Up to 9116 conditions per place. [2024-06-27 19:38:51,783 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 178 selfloop transitions, 53 changer transitions 0/259 dead transitions. [2024-06-27 19:38:51,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 259 transitions, 3117 flow [2024-06-27 19:38:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:38:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:38:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-27 19:38:51,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 19:38:51,784 INFO L175 Difference]: Start difference. First operand has 163 places, 234 transitions, 2591 flow. Second operand 5 states and 165 transitions. [2024-06-27 19:38:51,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 259 transitions, 3117 flow [2024-06-27 19:38:52,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 259 transitions, 2956 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:52,288 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2550 flow [2024-06-27 19:38:52,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2550, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-27 19:38:52,288 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 110 predicate places. [2024-06-27 19:38:52,288 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2550 flow [2024-06-27 19:38:52,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:52,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:52,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:52,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:38:52,288 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)] === [2024-06-27 19:38:52,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1483325819, now seen corresponding path program 1 times [2024-06-27 19:38:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:52,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5083292] [2024-06-27 19:38:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:52,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:52,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:52,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5083292] [2024-06-27 19:38:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5083292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:52,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:52,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:52,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509883993] [2024-06-27 19:38:52,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:52,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:52,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:52,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:52,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:52,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2550 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) [2024-06-27 19:38:52,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:52,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:52,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:53,579 INFO L124 PetriNetUnfolderBase]: 7307/10733 cut-off events. [2024-06-27 19:38:53,579 INFO L125 PetriNetUnfolderBase]: For 405443/406269 co-relation queries the response was YES. [2024-06-27 19:38:53,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71258 conditions, 10733 events. 7307/10733 cut-off events. For 405443/406269 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 63826 event pairs, 2253 based on Foata normal form. 123/10438 useless extension candidates. Maximal degree in co-relation 71179. Up to 9459 conditions per place. [2024-06-27 19:38:53,690 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 171 selfloop transitions, 93 changer transitions 0/289 dead transitions. [2024-06-27 19:38:53,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 289 transitions, 3640 flow [2024-06-27 19:38:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-27 19:38:53,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386554621848739 [2024-06-27 19:38:53,691 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2550 flow. Second operand 7 states and 228 transitions. [2024-06-27 19:38:53,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 289 transitions, 3640 flow [2024-06-27 19:38:54,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 289 transitions, 3523 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:54,145 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 2828 flow [2024-06-27 19:38:54,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2828, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2024-06-27 19:38:54,146 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 113 predicate places. [2024-06-27 19:38:54,146 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 2828 flow [2024-06-27 19:38:54,146 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) [2024-06-27 19:38:54,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:54,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:54,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:38:54,146 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)] === [2024-06-27 19:38:54,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1483445975, now seen corresponding path program 1 times [2024-06-27 19:38:54,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:54,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563558055] [2024-06-27 19:38:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:54,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:54,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:54,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563558055] [2024-06-27 19:38:54,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563558055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:54,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:54,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021876946] [2024-06-27 19:38:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:54,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:54,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:38:54,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 2828 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:54,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:54,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:38:54,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:55,519 INFO L124 PetriNetUnfolderBase]: 7736/11316 cut-off events. [2024-06-27 19:38:55,519 INFO L125 PetriNetUnfolderBase]: For 392948/392980 co-relation queries the response was YES. [2024-06-27 19:38:55,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72992 conditions, 11316 events. 7736/11316 cut-off events. For 392948/392980 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 66408 event pairs, 2556 based on Foata normal form. 30/11342 useless extension candidates. Maximal degree in co-relation 72912. Up to 10323 conditions per place. [2024-06-27 19:38:55,631 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 244 selfloop transitions, 63 changer transitions 0/316 dead transitions. [2024-06-27 19:38:55,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 316 transitions, 4116 flow [2024-06-27 19:38:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-06-27 19:38:55,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2024-06-27 19:38:55,632 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 2828 flow. Second operand 7 states and 219 transitions. [2024-06-27 19:38:55,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 316 transitions, 4116 flow [2024-06-27 19:38:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 316 transitions, 3970 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 19:38:56,160 INFO L231 Difference]: Finished difference. Result has 175 places, 271 transitions, 3166 flow [2024-06-27 19:38:56,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3166, PETRI_PLACES=175, PETRI_TRANSITIONS=271} [2024-06-27 19:38:56,160 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-06-27 19:38:56,161 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 271 transitions, 3166 flow [2024-06-27 19:38:56,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:56,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:56,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:38:56,161 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:56,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash -255980241, now seen corresponding path program 2 times [2024-06-27 19:38:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:56,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183261433] [2024-06-27 19:38:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:56,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:56,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183261433] [2024-06-27 19:38:56,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183261433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:56,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:56,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:56,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666795756] [2024-06-27 19:38:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:56,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:56,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:56,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:38:56,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 271 transitions, 3166 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) [2024-06-27 19:38:56,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:56,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:38:56,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:57,612 INFO L124 PetriNetUnfolderBase]: 7379/10849 cut-off events. [2024-06-27 19:38:57,612 INFO L125 PetriNetUnfolderBase]: For 468696/469896 co-relation queries the response was YES. [2024-06-27 19:38:57,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76813 conditions, 10849 events. 7379/10849 cut-off events. For 468696/469896 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 64711 event pairs, 2208 based on Foata normal form. 68/10529 useless extension candidates. Maximal degree in co-relation 76728. Up to 9742 conditions per place. [2024-06-27 19:38:57,722 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 202 selfloop transitions, 83 changer transitions 0/314 dead transitions. [2024-06-27 19:38:57,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 314 transitions, 3919 flow [2024-06-27 19:38:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 19:38:57,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-27 19:38:57,723 INFO L175 Difference]: Start difference. First operand has 175 places, 271 transitions, 3166 flow. Second operand 7 states and 218 transitions. [2024-06-27 19:38:57,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 314 transitions, 3919 flow [2024-06-27 19:38:58,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 314 transitions, 3843 flow, removed 29 selfloop flow, removed 1 redundant places. [2024-06-27 19:38:58,451 INFO L231 Difference]: Finished difference. Result has 181 places, 279 transitions, 3367 flow [2024-06-27 19:38:58,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3367, PETRI_PLACES=181, PETRI_TRANSITIONS=279} [2024-06-27 19:38:58,451 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 127 predicate places. [2024-06-27 19:38:58,451 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 279 transitions, 3367 flow [2024-06-27 19:38:58,451 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) [2024-06-27 19:38:58,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:58,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:58,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:38:58,452 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:38:58,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1660814645, now seen corresponding path program 2 times [2024-06-27 19:38:58,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:58,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930726578] [2024-06-27 19:38:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:58,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:58,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:58,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930726578] [2024-06-27 19:38:58,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930726578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:58,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:58,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:58,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601776639] [2024-06-27 19:38:58,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:58,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:58,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:38:58,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 279 transitions, 3367 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:58,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:58,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:38:58,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:59,877 INFO L124 PetriNetUnfolderBase]: 7860/11493 cut-off events. [2024-06-27 19:38:59,877 INFO L125 PetriNetUnfolderBase]: For 444228/444263 co-relation queries the response was YES. [2024-06-27 19:38:59,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77636 conditions, 11493 events. 7860/11493 cut-off events. For 444228/444263 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 67412 event pairs, 2556 based on Foata normal form. 33/11522 useless extension candidates. Maximal degree in co-relation 77549. Up to 10451 conditions per place. [2024-06-27 19:38:59,992 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 251 selfloop transitions, 81 changer transitions 0/341 dead transitions. [2024-06-27 19:38:59,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 341 transitions, 4689 flow [2024-06-27 19:38:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 19:38:59,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6050420168067226 [2024-06-27 19:38:59,993 INFO L175 Difference]: Start difference. First operand has 181 places, 279 transitions, 3367 flow. Second operand 7 states and 216 transitions. [2024-06-27 19:38:59,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 341 transitions, 4689 flow [2024-06-27 19:39:00,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 341 transitions, 4473 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:39:00,764 INFO L231 Difference]: Finished difference. Result has 186 places, 300 transitions, 3632 flow [2024-06-27 19:39:00,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3632, PETRI_PLACES=186, PETRI_TRANSITIONS=300} [2024-06-27 19:39:00,765 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 132 predicate places. [2024-06-27 19:39:00,765 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 300 transitions, 3632 flow [2024-06-27 19:39:00,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:00,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:00,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:39:00,765 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:00,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1488087419, now seen corresponding path program 3 times [2024-06-27 19:39:00,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:00,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804687023] [2024-06-27 19:39:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:00,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804687023] [2024-06-27 19:39:00,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804687023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:00,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:00,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:00,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888774392] [2024-06-27 19:39:00,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:00,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:00,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:00,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:00,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 300 transitions, 3632 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) [2024-06-27 19:39:00,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:00,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:00,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:02,280 INFO L124 PetriNetUnfolderBase]: 7530/11075 cut-off events. [2024-06-27 19:39:02,280 INFO L125 PetriNetUnfolderBase]: For 521368/522540 co-relation queries the response was YES. [2024-06-27 19:39:02,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80258 conditions, 11075 events. 7530/11075 cut-off events. For 521368/522540 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66201 event pairs, 2209 based on Foata normal form. 70/10758 useless extension candidates. Maximal degree in co-relation 80168. Up to 9888 conditions per place. [2024-06-27 19:39:02,414 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 216 selfloop transitions, 108 changer transitions 0/358 dead transitions. [2024-06-27 19:39:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 358 transitions, 4792 flow [2024-06-27 19:39:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 19:39:02,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5955882352941176 [2024-06-27 19:39:02,415 INFO L175 Difference]: Start difference. First operand has 186 places, 300 transitions, 3632 flow. Second operand 8 states and 243 transitions. [2024-06-27 19:39:02,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 358 transitions, 4792 flow [2024-06-27 19:39:03,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 358 transitions, 4651 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 19:39:03,227 INFO L231 Difference]: Finished difference. Result has 194 places, 320 transitions, 4043 flow [2024-06-27 19:39:03,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4043, PETRI_PLACES=194, PETRI_TRANSITIONS=320} [2024-06-27 19:39:03,228 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 140 predicate places. [2024-06-27 19:39:03,228 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 320 transitions, 4043 flow [2024-06-27 19:39:03,228 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) [2024-06-27 19:39:03,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:03,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:03,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:39:03,228 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:03,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1660577495, now seen corresponding path program 3 times [2024-06-27 19:39:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:03,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841968084] [2024-06-27 19:39:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:03,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:03,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:03,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841968084] [2024-06-27 19:39:03,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841968084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:03,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:03,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:03,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943521551] [2024-06-27 19:39:03,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:03,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:03,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:03,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:03,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:03,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 320 transitions, 4043 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:03,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:03,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:03,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:04,811 INFO L124 PetriNetUnfolderBase]: 7931/11595 cut-off events. [2024-06-27 19:39:04,811 INFO L125 PetriNetUnfolderBase]: For 490753/490790 co-relation queries the response was YES. [2024-06-27 19:39:04,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79960 conditions, 11595 events. 7931/11595 cut-off events. For 490753/490790 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68076 event pairs, 2557 based on Foata normal form. 35/11626 useless extension candidates. Maximal degree in co-relation 79867. Up to 10545 conditions per place. [2024-06-27 19:39:04,945 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 273 selfloop transitions, 79 changer transitions 0/361 dead transitions. [2024-06-27 19:39:04,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 361 transitions, 5177 flow [2024-06-27 19:39:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-27 19:39:04,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-27 19:39:04,952 INFO L175 Difference]: Start difference. First operand has 194 places, 320 transitions, 4043 flow. Second operand 7 states and 217 transitions. [2024-06-27 19:39:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 361 transitions, 5177 flow [2024-06-27 19:39:05,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 361 transitions, 4964 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 19:39:05,904 INFO L231 Difference]: Finished difference. Result has 198 places, 320 transitions, 4003 flow [2024-06-27 19:39:05,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4003, PETRI_PLACES=198, PETRI_TRANSITIONS=320} [2024-06-27 19:39:05,905 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 144 predicate places. [2024-06-27 19:39:05,905 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 320 transitions, 4003 flow [2024-06-27 19:39:05,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:05,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:05,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:05,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:39:05,905 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:05,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:05,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1394787959, now seen corresponding path program 1 times [2024-06-27 19:39:05,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:05,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038421467] [2024-06-27 19:39:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:05,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:06,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:06,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038421467] [2024-06-27 19:39:06,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038421467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:06,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151681511] [2024-06-27 19:39:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:06,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:06,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 320 transitions, 4003 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:06,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:06,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:06,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:07,557 INFO L124 PetriNetUnfolderBase]: 8132/11898 cut-off events. [2024-06-27 19:39:07,558 INFO L125 PetriNetUnfolderBase]: For 530486/530508 co-relation queries the response was YES. [2024-06-27 19:39:07,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82080 conditions, 11898 events. 8132/11898 cut-off events. For 530486/530508 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70129 event pairs, 2067 based on Foata normal form. 30/11924 useless extension candidates. Maximal degree in co-relation 81987. Up to 10767 conditions per place. [2024-06-27 19:39:07,688 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 331 selfloop transitions, 39 changer transitions 0/379 dead transitions. [2024-06-27 19:39:07,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 5155 flow [2024-06-27 19:39:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-27 19:39:07,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6106442577030813 [2024-06-27 19:39:07,689 INFO L175 Difference]: Start difference. First operand has 198 places, 320 transitions, 4003 flow. Second operand 7 states and 218 transitions. [2024-06-27 19:39:07,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 5155 flow [2024-06-27 19:39:08,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 379 transitions, 5022 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:39:08,748 INFO L231 Difference]: Finished difference. Result has 204 places, 330 transitions, 4083 flow [2024-06-27 19:39:08,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=3870, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4083, PETRI_PLACES=204, PETRI_TRANSITIONS=330} [2024-06-27 19:39:08,749 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 150 predicate places. [2024-06-27 19:39:08,749 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 330 transitions, 4083 flow [2024-06-27 19:39:08,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:08,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:08,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:08,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:39:08,749 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:08,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:08,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1402197269, now seen corresponding path program 2 times [2024-06-27 19:39:08,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:08,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44288500] [2024-06-27 19:39:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:08,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44288500] [2024-06-27 19:39:08,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44288500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:08,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:08,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046781223] [2024-06-27 19:39:08,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:08,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:08,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:08,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 330 transitions, 4083 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:08,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:08,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:08,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:10,465 INFO L124 PetriNetUnfolderBase]: 8372/12234 cut-off events. [2024-06-27 19:39:10,466 INFO L125 PetriNetUnfolderBase]: For 571665/571687 co-relation queries the response was YES. [2024-06-27 19:39:10,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85844 conditions, 12234 events. 8372/12234 cut-off events. For 571665/571687 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72216 event pairs, 2557 based on Foata normal form. 30/12260 useless extension candidates. Maximal degree in co-relation 85748. Up to 11203 conditions per place. [2024-06-27 19:39:10,614 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 335 selfloop transitions, 36 changer transitions 0/380 dead transitions. [2024-06-27 19:39:10,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 380 transitions, 5196 flow [2024-06-27 19:39:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-27 19:39:10,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022408963585434 [2024-06-27 19:39:10,615 INFO L175 Difference]: Start difference. First operand has 204 places, 330 transitions, 4083 flow. Second operand 7 states and 215 transitions. [2024-06-27 19:39:10,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 380 transitions, 5196 flow [2024-06-27 19:39:11,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 380 transitions, 5142 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:39:11,850 INFO L231 Difference]: Finished difference. Result has 210 places, 336 transitions, 4193 flow [2024-06-27 19:39:11,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4193, PETRI_PLACES=210, PETRI_TRANSITIONS=336} [2024-06-27 19:39:11,850 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 156 predicate places. [2024-06-27 19:39:11,851 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 336 transitions, 4193 flow [2024-06-27 19:39:11,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:11,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:11,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:11,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:39:11,851 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:11,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1660811669, now seen corresponding path program 3 times [2024-06-27 19:39:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:11,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672686850] [2024-06-27 19:39:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:11,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672686850] [2024-06-27 19:39:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672686850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:11,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:11,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:11,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541924276] [2024-06-27 19:39:11,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:11,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:11,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:11,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:12,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:12,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 336 transitions, 4193 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:12,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:12,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:12,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:13,713 INFO L124 PetriNetUnfolderBase]: 8328/12174 cut-off events. [2024-06-27 19:39:13,713 INFO L125 PetriNetUnfolderBase]: For 587577/587599 co-relation queries the response was YES. [2024-06-27 19:39:13,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85833 conditions, 12174 events. 8328/12174 cut-off events. For 587577/587599 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 71868 event pairs, 2556 based on Foata normal form. 34/12204 useless extension candidates. Maximal degree in co-relation 85734. Up to 11266 conditions per place. [2024-06-27 19:39:13,831 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 334 selfloop transitions, 33 changer transitions 0/376 dead transitions. [2024-06-27 19:39:13,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 376 transitions, 5068 flow [2024-06-27 19:39:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-27 19:39:13,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2024-06-27 19:39:13,833 INFO L175 Difference]: Start difference. First operand has 210 places, 336 transitions, 4193 flow. Second operand 7 states and 210 transitions. [2024-06-27 19:39:13,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 376 transitions, 5068 flow [2024-06-27 19:39:15,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 376 transitions, 5022 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:39:15,024 INFO L231 Difference]: Finished difference. Result has 214 places, 337 transitions, 4239 flow [2024-06-27 19:39:15,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4239, PETRI_PLACES=214, PETRI_TRANSITIONS=337} [2024-06-27 19:39:15,025 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 160 predicate places. [2024-06-27 19:39:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 337 transitions, 4239 flow [2024-06-27 19:39:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:15,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:15,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:15,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:39:15,025 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:15,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash 767747173, now seen corresponding path program 4 times [2024-06-27 19:39:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278218348] [2024-06-27 19:39:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:15,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:15,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278218348] [2024-06-27 19:39:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278218348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:15,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393028878] [2024-06-27 19:39:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:15,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:15,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 337 transitions, 4239 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) [2024-06-27 19:39:15,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:15,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:15,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:16,709 INFO L124 PetriNetUnfolderBase]: 7928/11675 cut-off events. [2024-06-27 19:39:16,709 INFO L125 PetriNetUnfolderBase]: For 664894/666122 co-relation queries the response was YES. [2024-06-27 19:39:16,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87673 conditions, 11675 events. 7928/11675 cut-off events. For 664894/666122 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70450 event pairs, 2278 based on Foata normal form. 119/11426 useless extension candidates. Maximal degree in co-relation 87572. Up to 10302 conditions per place. [2024-06-27 19:39:16,852 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 243 selfloop transitions, 112 changer transitions 0/395 dead transitions. [2024-06-27 19:39:16,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 395 transitions, 5549 flow [2024-06-27 19:39:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-27 19:39:16,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-27 19:39:16,854 INFO L175 Difference]: Start difference. First operand has 214 places, 337 transitions, 4239 flow. Second operand 8 states and 257 transitions. [2024-06-27 19:39:16,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 395 transitions, 5549 flow [2024-06-27 19:39:18,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 395 transitions, 5485 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:18,258 INFO L231 Difference]: Finished difference. Result has 217 places, 345 transitions, 4548 flow [2024-06-27 19:39:18,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4548, PETRI_PLACES=217, PETRI_TRANSITIONS=345} [2024-06-27 19:39:18,258 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 163 predicate places. [2024-06-27 19:39:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 345 transitions, 4548 flow [2024-06-27 19:39:18,259 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) [2024-06-27 19:39:18,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:18,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:39:18,259 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:18,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1473818169, now seen corresponding path program 5 times [2024-06-27 19:39:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:18,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633711658] [2024-06-27 19:39:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633711658] [2024-06-27 19:39:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633711658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:18,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:18,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:18,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648589262] [2024-06-27 19:39:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:18,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:18,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:18,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 345 transitions, 4548 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) [2024-06-27 19:39:18,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:18,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:18,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:20,010 INFO L124 PetriNetUnfolderBase]: 7974/11746 cut-off events. [2024-06-27 19:39:20,010 INFO L125 PetriNetUnfolderBase]: For 697434/698685 co-relation queries the response was YES. [2024-06-27 19:39:20,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89230 conditions, 11746 events. 7974/11746 cut-off events. For 697434/698685 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 70938 event pairs, 2278 based on Foata normal form. 155/11533 useless extension candidates. Maximal degree in co-relation 89128. Up to 10348 conditions per place. [2024-06-27 19:39:20,158 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 242 selfloop transitions, 123 changer transitions 0/405 dead transitions. [2024-06-27 19:39:20,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 405 transitions, 5908 flow [2024-06-27 19:39:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:39:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:39:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-27 19:39:20,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6100217864923747 [2024-06-27 19:39:20,159 INFO L175 Difference]: Start difference. First operand has 217 places, 345 transitions, 4548 flow. Second operand 9 states and 280 transitions. [2024-06-27 19:39:20,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 405 transitions, 5908 flow [2024-06-27 19:39:21,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 405 transitions, 5531 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:21,571 INFO L231 Difference]: Finished difference. Result has 221 places, 353 transitions, 4583 flow [2024-06-27 19:39:21,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4583, PETRI_PLACES=221, PETRI_TRANSITIONS=353} [2024-06-27 19:39:21,572 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 167 predicate places. [2024-06-27 19:39:21,572 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 353 transitions, 4583 flow [2024-06-27 19:39:21,572 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) [2024-06-27 19:39:21,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:21,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:21,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:39:21,573 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:21,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1479363759, now seen corresponding path program 6 times [2024-06-27 19:39:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020829533] [2024-06-27 19:39:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:21,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:21,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020829533] [2024-06-27 19:39:21,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020829533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:21,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:21,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:21,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271946798] [2024-06-27 19:39:21,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:21,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:21,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:21,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:21,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 353 transitions, 4583 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) [2024-06-27 19:39:21,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:21,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:21,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:23,274 INFO L124 PetriNetUnfolderBase]: 7980/11749 cut-off events. [2024-06-27 19:39:23,275 INFO L125 PetriNetUnfolderBase]: For 722451/723728 co-relation queries the response was YES. [2024-06-27 19:39:23,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89636 conditions, 11749 events. 7980/11749 cut-off events. For 722451/723728 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70768 event pairs, 2308 based on Foata normal form. 146/11512 useless extension candidates. Maximal degree in co-relation 89533. Up to 10356 conditions per place. [2024-06-27 19:39:23,422 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 237 selfloop transitions, 112 changer transitions 0/389 dead transitions. [2024-06-27 19:39:23,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 389 transitions, 5721 flow [2024-06-27 19:39:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:39:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:39:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-27 19:39:23,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 19:39:23,423 INFO L175 Difference]: Start difference. First operand has 221 places, 353 transitions, 4583 flow. Second operand 6 states and 198 transitions. [2024-06-27 19:39:23,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 389 transitions, 5721 flow [2024-06-27 19:39:25,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 389 transitions, 5449 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:25,081 INFO L231 Difference]: Finished difference. Result has 222 places, 353 transitions, 4544 flow [2024-06-27 19:39:25,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4544, PETRI_PLACES=222, PETRI_TRANSITIONS=353} [2024-06-27 19:39:25,081 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 168 predicate places. [2024-06-27 19:39:25,081 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 353 transitions, 4544 flow [2024-06-27 19:39:25,082 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) [2024-06-27 19:39:25,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:25,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:25,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:39:25,082 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:25,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:25,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1479358923, now seen corresponding path program 4 times [2024-06-27 19:39:25,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:25,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987555853] [2024-06-27 19:39:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:25,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:25,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:25,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987555853] [2024-06-27 19:39:25,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987555853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:25,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:25,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:25,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448432561] [2024-06-27 19:39:25,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:25,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:25,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:25,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:25,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 353 transitions, 4544 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:25,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:25,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:25,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:26,874 INFO L124 PetriNetUnfolderBase]: 8424/12321 cut-off events. [2024-06-27 19:39:26,874 INFO L125 PetriNetUnfolderBase]: For 682070/682107 co-relation queries the response was YES. [2024-06-27 19:39:26,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89466 conditions, 12321 events. 8424/12321 cut-off events. For 682070/682107 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 72845 event pairs, 2609 based on Foata normal form. 35/12352 useless extension candidates. Maximal degree in co-relation 89362. Up to 11321 conditions per place. [2024-06-27 19:39:27,018 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 321 selfloop transitions, 57 changer transitions 0/387 dead transitions. [2024-06-27 19:39:27,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 387 transitions, 5581 flow [2024-06-27 19:39:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:39:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:39:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 19:39:27,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-27 19:39:27,019 INFO L175 Difference]: Start difference. First operand has 222 places, 353 transitions, 4544 flow. Second operand 6 states and 189 transitions. [2024-06-27 19:39:27,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 387 transitions, 5581 flow [2024-06-27 19:39:28,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 387 transitions, 5333 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:28,680 INFO L231 Difference]: Finished difference. Result has 223 places, 353 transitions, 4426 flow [2024-06-27 19:39:28,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4298, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4426, PETRI_PLACES=223, PETRI_TRANSITIONS=353} [2024-06-27 19:39:28,681 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 169 predicate places. [2024-06-27 19:39:28,681 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 353 transitions, 4426 flow [2024-06-27 19:39:28,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:28,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:28,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:28,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:39:28,681 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:28,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1479359109, now seen corresponding path program 7 times [2024-06-27 19:39:28,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:28,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779656916] [2024-06-27 19:39:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:28,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:28,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779656916] [2024-06-27 19:39:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779656916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:28,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:28,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206654527] [2024-06-27 19:39:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:28,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:28,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 353 transitions, 4426 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) [2024-06-27 19:39:28,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:28,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:28,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:30,747 INFO L124 PetriNetUnfolderBase]: 7953/11717 cut-off events. [2024-06-27 19:39:30,747 INFO L125 PetriNetUnfolderBase]: For 775205/776485 co-relation queries the response was YES. [2024-06-27 19:39:30,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90142 conditions, 11717 events. 7953/11717 cut-off events. For 775205/776485 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70685 event pairs, 2276 based on Foata normal form. 97/11446 useless extension candidates. Maximal degree in co-relation 90037. Up to 10522 conditions per place. [2024-06-27 19:39:30,906 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 264 selfloop transitions, 77 changer transitions 0/381 dead transitions. [2024-06-27 19:39:30,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 381 transitions, 5180 flow [2024-06-27 19:39:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:39:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:39:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-27 19:39:30,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-27 19:39:30,907 INFO L175 Difference]: Start difference. First operand has 223 places, 353 transitions, 4426 flow. Second operand 6 states and 189 transitions. [2024-06-27 19:39:30,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 381 transitions, 5180 flow [2024-06-27 19:39:32,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 381 transitions, 5006 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:32,703 INFO L231 Difference]: Finished difference. Result has 224 places, 353 transitions, 4416 flow [2024-06-27 19:39:32,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4416, PETRI_PLACES=224, PETRI_TRANSITIONS=353} [2024-06-27 19:39:32,704 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 170 predicate places. [2024-06-27 19:39:32,704 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 353 transitions, 4416 flow [2024-06-27 19:39:32,704 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) [2024-06-27 19:39:32,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:32,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:39:32,704 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:32,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash -525431883, now seen corresponding path program 5 times [2024-06-27 19:39:32,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:32,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652733646] [2024-06-27 19:39:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:32,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652733646] [2024-06-27 19:39:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652733646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529530148] [2024-06-27 19:39:32,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:32,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:32,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:32,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:32,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:32,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 353 transitions, 4416 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:32,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:32,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:32,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:34,527 INFO L124 PetriNetUnfolderBase]: 8429/12328 cut-off events. [2024-06-27 19:39:34,527 INFO L125 PetriNetUnfolderBase]: For 732957/732994 co-relation queries the response was YES. [2024-06-27 19:39:34,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90330 conditions, 12328 events. 8429/12328 cut-off events. For 732957/732994 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 72924 event pairs, 2608 based on Foata normal form. 35/12359 useless extension candidates. Maximal degree in co-relation 90224. Up to 11324 conditions per place. [2024-06-27 19:39:34,695 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 317 selfloop transitions, 61 changer transitions 0/387 dead transitions. [2024-06-27 19:39:34,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 387 transitions, 5509 flow [2024-06-27 19:39:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:39:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:39:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-27 19:39:34,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392156862745098 [2024-06-27 19:39:34,696 INFO L175 Difference]: Start difference. First operand has 224 places, 353 transitions, 4416 flow. Second operand 5 states and 163 transitions. [2024-06-27 19:39:34,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 387 transitions, 5509 flow [2024-06-27 19:39:36,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 387 transitions, 5299 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:39:36,557 INFO L231 Difference]: Finished difference. Result has 224 places, 358 transitions, 4457 flow [2024-06-27 19:39:36,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4457, PETRI_PLACES=224, PETRI_TRANSITIONS=358} [2024-06-27 19:39:36,558 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 170 predicate places. [2024-06-27 19:39:36,558 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 358 transitions, 4457 flow [2024-06-27 19:39:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:36,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:36,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:36,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:39:36,559 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:36,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash -525432069, now seen corresponding path program 8 times [2024-06-27 19:39:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080665273] [2024-06-27 19:39:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:36,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:36,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:36,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080665273] [2024-06-27 19:39:36,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080665273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:36,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:36,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:36,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577303505] [2024-06-27 19:39:36,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:36,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:36,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:36,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:36,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 358 transitions, 4457 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) [2024-06-27 19:39:36,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:36,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:36,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:38,487 INFO L124 PetriNetUnfolderBase]: 7953/11724 cut-off events. [2024-06-27 19:39:38,488 INFO L125 PetriNetUnfolderBase]: For 829183/830446 co-relation queries the response was YES. [2024-06-27 19:39:38,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91404 conditions, 11724 events. 7953/11724 cut-off events. For 829183/830446 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70886 event pairs, 2275 based on Foata normal form. 128/11484 useless extension candidates. Maximal degree in co-relation 91297. Up to 10388 conditions per place. [2024-06-27 19:39:38,675 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 256 selfloop transitions, 105 changer transitions 0/402 dead transitions. [2024-06-27 19:39:38,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 402 transitions, 5483 flow [2024-06-27 19:39:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-06-27 19:39:38,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414565826330533 [2024-06-27 19:39:38,676 INFO L175 Difference]: Start difference. First operand has 224 places, 358 transitions, 4457 flow. Second operand 7 states and 229 transitions. [2024-06-27 19:39:38,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 402 transitions, 5483 flow [2024-06-27 19:39:40,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 402 transitions, 5330 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:39:40,684 INFO L231 Difference]: Finished difference. Result has 227 places, 358 transitions, 4544 flow [2024-06-27 19:39:40,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4312, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4544, PETRI_PLACES=227, PETRI_TRANSITIONS=358} [2024-06-27 19:39:40,684 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 173 predicate places. [2024-06-27 19:39:40,684 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 358 transitions, 4544 flow [2024-06-27 19:39:40,685 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) [2024-06-27 19:39:40,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:40,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:40,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:39:40,685 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:40,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:40,685 INFO L85 PathProgramCache]: Analyzing trace with hash -525420723, now seen corresponding path program 6 times [2024-06-27 19:39:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:40,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472846361] [2024-06-27 19:39:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:40,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:40,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472846361] [2024-06-27 19:39:40,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472846361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:40,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:40,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:40,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367797644] [2024-06-27 19:39:40,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:40,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:40,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:40,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:40,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 358 transitions, 4544 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:40,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:40,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:40,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:42,534 INFO L124 PetriNetUnfolderBase]: 8411/12306 cut-off events. [2024-06-27 19:39:42,535 INFO L125 PetriNetUnfolderBase]: For 728748/728787 co-relation queries the response was YES. [2024-06-27 19:39:42,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90208 conditions, 12306 events. 8411/12306 cut-off events. For 728748/728787 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72925 event pairs, 2591 based on Foata normal form. 37/12340 useless extension candidates. Maximal degree in co-relation 90102. Up to 11303 conditions per place. [2024-06-27 19:39:42,682 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 319 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2024-06-27 19:39:42,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 394 transitions, 5424 flow [2024-06-27 19:39:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-27 19:39:42,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938375350140056 [2024-06-27 19:39:42,683 INFO L175 Difference]: Start difference. First operand has 227 places, 358 transitions, 4544 flow. Second operand 7 states and 212 transitions. [2024-06-27 19:39:42,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 394 transitions, 5424 flow [2024-06-27 19:39:44,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 394 transitions, 5144 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 19:39:44,718 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 4423 flow [2024-06-27 19:39:44,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4423, PETRI_PLACES=225, PETRI_TRANSITIONS=359} [2024-06-27 19:39:44,718 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 171 predicate places. [2024-06-27 19:39:44,718 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 4423 flow [2024-06-27 19:39:44,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:44,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:44,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:44,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:39:44,719 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:44,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash -525426489, now seen corresponding path program 9 times [2024-06-27 19:39:44,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:44,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092631393] [2024-06-27 19:39:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:44,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:44,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092631393] [2024-06-27 19:39:44,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092631393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:44,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:44,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:44,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45184442] [2024-06-27 19:39:44,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:44,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:44,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:44,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 359 transitions, 4423 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) [2024-06-27 19:39:44,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:44,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:44,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:46,549 INFO L124 PetriNetUnfolderBase]: 7935/11701 cut-off events. [2024-06-27 19:39:46,550 INFO L125 PetriNetUnfolderBase]: For 763983/765239 co-relation queries the response was YES. [2024-06-27 19:39:46,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89592 conditions, 11701 events. 7935/11701 cut-off events. For 763983/765239 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70692 event pairs, 2275 based on Foata normal form. 128/11461 useless extension candidates. Maximal degree in co-relation 89487. Up to 10370 conditions per place. [2024-06-27 19:39:46,707 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 247 selfloop transitions, 105 changer transitions 0/394 dead transitions. [2024-06-27 19:39:46,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 394 transitions, 5219 flow [2024-06-27 19:39:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:39:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:39:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-06-27 19:39:46,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 19:39:46,708 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 4423 flow. Second operand 6 states and 198 transitions. [2024-06-27 19:39:46,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 394 transitions, 5219 flow [2024-06-27 19:39:48,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 394 transitions, 5042 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:39:48,360 INFO L231 Difference]: Finished difference. Result has 225 places, 359 transitions, 4472 flow [2024-06-27 19:39:48,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4472, PETRI_PLACES=225, PETRI_TRANSITIONS=359} [2024-06-27 19:39:48,361 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 171 predicate places. [2024-06-27 19:39:48,361 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 359 transitions, 4472 flow [2024-06-27 19:39:48,361 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) [2024-06-27 19:39:48,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:48,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:48,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:39:48,362 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:48,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:48,362 INFO L85 PathProgramCache]: Analyzing trace with hash -727576499, now seen corresponding path program 7 times [2024-06-27 19:39:48,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:48,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556119696] [2024-06-27 19:39:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:48,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:48,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556119696] [2024-06-27 19:39:48,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556119696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:48,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706615947] [2024-06-27 19:39:48,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:48,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:48,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:48,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:48,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:48,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 359 transitions, 4472 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:48,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:48,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:48,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:50,128 INFO L124 PetriNetUnfolderBase]: 8416/12313 cut-off events. [2024-06-27 19:39:50,128 INFO L125 PetriNetUnfolderBase]: For 698896/698922 co-relation queries the response was YES. [2024-06-27 19:39:50,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89377 conditions, 12313 events. 8416/12313 cut-off events. For 698896/698922 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 72999 event pairs, 2643 based on Foata normal form. 19/12328 useless extension candidates. Maximal degree in co-relation 89272. Up to 11216 conditions per place. [2024-06-27 19:39:50,291 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 292 selfloop transitions, 91 changer transitions 0/392 dead transitions. [2024-06-27 19:39:50,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 392 transitions, 5564 flow [2024-06-27 19:39:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:39:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:39:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 19:39:50,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-27 19:39:50,292 INFO L175 Difference]: Start difference. First operand has 225 places, 359 transitions, 4472 flow. Second operand 6 states and 182 transitions. [2024-06-27 19:39:50,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 392 transitions, 5564 flow [2024-06-27 19:39:52,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 392 transitions, 5340 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:39:52,017 INFO L231 Difference]: Finished difference. Result has 226 places, 365 transitions, 4556 flow [2024-06-27 19:39:52,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4556, PETRI_PLACES=226, PETRI_TRANSITIONS=365} [2024-06-27 19:39:52,018 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 172 predicate places. [2024-06-27 19:39:52,018 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 365 transitions, 4556 flow [2024-06-27 19:39:52,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:52,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:52,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:52,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:39:52,019 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:52,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash -738538409, now seen corresponding path program 8 times [2024-06-27 19:39:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:52,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182265873] [2024-06-27 19:39:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:52,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182265873] [2024-06-27 19:39:52,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182265873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:52,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:52,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:52,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100587030] [2024-06-27 19:39:52,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:52,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:52,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:52,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:52,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 365 transitions, 4556 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:52,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:52,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:52,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:53,796 INFO L124 PetriNetUnfolderBase]: 8432/12338 cut-off events. [2024-06-27 19:39:53,796 INFO L125 PetriNetUnfolderBase]: For 697043/697080 co-relation queries the response was YES. [2024-06-27 19:39:53,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89745 conditions, 12338 events. 8432/12338 cut-off events. For 697043/697080 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 73043 event pairs, 2607 based on Foata normal form. 35/12369 useless extension candidates. Maximal degree in co-relation 89639. Up to 11233 conditions per place. [2024-06-27 19:39:53,951 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 300 selfloop transitions, 96 changer transitions 0/405 dead transitions. [2024-06-27 19:39:53,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 405 transitions, 5689 flow [2024-06-27 19:39:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:39:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:39:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-27 19:39:53,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-27 19:39:53,952 INFO L175 Difference]: Start difference. First operand has 226 places, 365 transitions, 4556 flow. Second operand 6 states and 192 transitions. [2024-06-27 19:39:53,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 405 transitions, 5689 flow [2024-06-27 19:39:55,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 405 transitions, 5552 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 19:39:55,848 INFO L231 Difference]: Finished difference. Result has 230 places, 369 transitions, 4690 flow [2024-06-27 19:39:55,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4690, PETRI_PLACES=230, PETRI_TRANSITIONS=369} [2024-06-27 19:39:55,849 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 176 predicate places. [2024-06-27 19:39:55,849 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 369 transitions, 4690 flow [2024-06-27 19:39:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:55,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:55,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:55,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:39:55,849 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:55,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:55,849 INFO L85 PathProgramCache]: Analyzing trace with hash -738301259, now seen corresponding path program 9 times [2024-06-27 19:39:55,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:55,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689358111] [2024-06-27 19:39:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:55,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689358111] [2024-06-27 19:39:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689358111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:55,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:55,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055075169] [2024-06-27 19:39:55,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:55,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:55,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:55,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:55,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:56,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:39:56,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 369 transitions, 4690 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:56,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:56,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:39:56,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:57,743 INFO L124 PetriNetUnfolderBase]: 8425/12329 cut-off events. [2024-06-27 19:39:57,743 INFO L125 PetriNetUnfolderBase]: For 723892/723929 co-relation queries the response was YES. [2024-06-27 19:39:57,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90207 conditions, 12329 events. 8425/12329 cut-off events. For 723892/723929 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 72976 event pairs, 2607 based on Foata normal form. 35/12360 useless extension candidates. Maximal degree in co-relation 90099. Up to 11226 conditions per place. [2024-06-27 19:39:57,874 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 295 selfloop transitions, 96 changer transitions 0/400 dead transitions. [2024-06-27 19:39:57,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 400 transitions, 5559 flow [2024-06-27 19:39:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:39:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:39:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 19:39:57,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-27 19:39:57,875 INFO L175 Difference]: Start difference. First operand has 230 places, 369 transitions, 4690 flow. Second operand 6 states and 186 transitions. [2024-06-27 19:39:57,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 400 transitions, 5559 flow [2024-06-27 19:39:59,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 400 transitions, 5368 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:59,477 INFO L231 Difference]: Finished difference. Result has 231 places, 369 transitions, 4705 flow [2024-06-27 19:39:59,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4499, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4705, PETRI_PLACES=231, PETRI_TRANSITIONS=369} [2024-06-27 19:39:59,477 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 177 predicate places. [2024-06-27 19:39:59,478 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 369 transitions, 4705 flow [2024-06-27 19:39:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:59,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:59,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:59,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:39:59,478 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:39:59,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -738538595, now seen corresponding path program 10 times [2024-06-27 19:39:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56168583] [2024-06-27 19:39:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:59,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:59,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56168583] [2024-06-27 19:39:59,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56168583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:59,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:59,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217386286] [2024-06-27 19:39:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:59,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:39:59,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 369 transitions, 4705 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) [2024-06-27 19:39:59,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:59,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:39:59,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:01,292 INFO L124 PetriNetUnfolderBase]: 7951/11727 cut-off events. [2024-06-27 19:40:01,292 INFO L125 PetriNetUnfolderBase]: For 760410/761666 co-relation queries the response was YES. [2024-06-27 19:40:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89787 conditions, 11727 events. 7951/11727 cut-off events. For 760410/761666 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 70823 event pairs, 2274 based on Foata normal form. 151/11510 useless extension candidates. Maximal degree in co-relation 89680. Up to 10289 conditions per place. [2024-06-27 19:40:01,439 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 226 selfloop transitions, 147 changer transitions 0/418 dead transitions. [2024-06-27 19:40:01,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 418 transitions, 5579 flow [2024-06-27 19:40:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-06-27 19:40:01,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299019607843137 [2024-06-27 19:40:01,440 INFO L175 Difference]: Start difference. First operand has 231 places, 369 transitions, 4705 flow. Second operand 8 states and 257 transitions. [2024-06-27 19:40:01,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 418 transitions, 5579 flow [2024-06-27 19:40:03,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 418 transitions, 5360 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:40:03,242 INFO L231 Difference]: Finished difference. Result has 234 places, 369 transitions, 4808 flow [2024-06-27 19:40:03,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4808, PETRI_PLACES=234, PETRI_TRANSITIONS=369} [2024-06-27 19:40:03,242 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 180 predicate places. [2024-06-27 19:40:03,242 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 369 transitions, 4808 flow [2024-06-27 19:40:03,242 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) [2024-06-27 19:40:03,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:03,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:03,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:40:03,243 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:03,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -738304235, now seen corresponding path program 4 times [2024-06-27 19:40:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:03,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999511791] [2024-06-27 19:40:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:03,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:03,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999511791] [2024-06-27 19:40:03,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999511791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:03,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:03,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:03,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311385108] [2024-06-27 19:40:03,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:03,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:40:03,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 369 transitions, 4808 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:03,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:03,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:40:03,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:05,060 INFO L124 PetriNetUnfolderBase]: 8512/12465 cut-off events. [2024-06-27 19:40:05,061 INFO L125 PetriNetUnfolderBase]: For 708843/708865 co-relation queries the response was YES. [2024-06-27 19:40:05,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90264 conditions, 12465 events. 8512/12465 cut-off events. For 708843/708865 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 73881 event pairs, 2564 based on Foata normal form. 34/12495 useless extension candidates. Maximal degree in co-relation 90157. Up to 11426 conditions per place. [2024-06-27 19:40:05,204 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 362 selfloop transitions, 35 changer transitions 0/406 dead transitions. [2024-06-27 19:40:05,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 406 transitions, 5743 flow [2024-06-27 19:40:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:40:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:40:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-27 19:40:05,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-06-27 19:40:05,205 INFO L175 Difference]: Start difference. First operand has 234 places, 369 transitions, 4808 flow. Second operand 6 states and 185 transitions. [2024-06-27 19:40:05,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 406 transitions, 5743 flow [2024-06-27 19:40:06,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 406 transitions, 5431 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:40:06,693 INFO L231 Difference]: Finished difference. Result has 232 places, 371 transitions, 4608 flow [2024-06-27 19:40:06,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4608, PETRI_PLACES=232, PETRI_TRANSITIONS=371} [2024-06-27 19:40:06,693 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 178 predicate places. [2024-06-27 19:40:06,693 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 371 transitions, 4608 flow [2024-06-27 19:40:06,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:06,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:06,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:06,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:40:06,694 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:06,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash -738630665, now seen corresponding path program 5 times [2024-06-27 19:40:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:06,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722276234] [2024-06-27 19:40:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:06,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:06,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:06,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722276234] [2024-06-27 19:40:06,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722276234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:06,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:06,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:06,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092898353] [2024-06-27 19:40:06,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:06,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:06,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:06,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:06,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:06,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:40:06,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 371 transitions, 4608 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:06,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:06,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:40:06,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:08,520 INFO L124 PetriNetUnfolderBase]: 8583/12566 cut-off events. [2024-06-27 19:40:08,521 INFO L125 PetriNetUnfolderBase]: For 650917/650939 co-relation queries the response was YES. [2024-06-27 19:40:08,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89405 conditions, 12566 events. 8583/12566 cut-off events. For 650917/650939 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 74574 event pairs, 2086 based on Foata normal form. 30/12592 useless extension candidates. Maximal degree in co-relation 89298. Up to 11091 conditions per place. [2024-06-27 19:40:08,679 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 358 selfloop transitions, 50 changer transitions 0/417 dead transitions. [2024-06-27 19:40:08,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 417 transitions, 5780 flow [2024-06-27 19:40:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:40:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:40:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-27 19:40:08,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.630718954248366 [2024-06-27 19:40:08,680 INFO L175 Difference]: Start difference. First operand has 232 places, 371 transitions, 4608 flow. Second operand 6 states and 193 transitions. [2024-06-27 19:40:08,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 417 transitions, 5780 flow [2024-06-27 19:40:10,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 417 transitions, 5714 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:40:10,113 INFO L231 Difference]: Finished difference. Result has 235 places, 374 transitions, 4722 flow [2024-06-27 19:40:10,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4722, PETRI_PLACES=235, PETRI_TRANSITIONS=374} [2024-06-27 19:40:10,113 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 181 predicate places. [2024-06-27 19:40:10,114 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 374 transitions, 4722 flow [2024-06-27 19:40:10,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:10,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:10,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:10,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:40:10,114 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:10,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:10,114 INFO L85 PathProgramCache]: Analyzing trace with hash -727579475, now seen corresponding path program 6 times [2024-06-27 19:40:10,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:10,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656249925] [2024-06-27 19:40:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:10,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:10,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656249925] [2024-06-27 19:40:10,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656249925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:10,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:10,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:10,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839502221] [2024-06-27 19:40:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:10,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:10,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:10,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:10,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:10,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:40:10,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 374 transitions, 4722 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:10,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:10,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:40:10,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:12,044 INFO L124 PetriNetUnfolderBase]: 8539/12503 cut-off events. [2024-06-27 19:40:12,044 INFO L125 PetriNetUnfolderBase]: For 668344/668358 co-relation queries the response was YES. [2024-06-27 19:40:12,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89590 conditions, 12503 events. 8539/12503 cut-off events. For 668344/668358 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74159 event pairs, 2576 based on Foata normal form. 21/12520 useless extension candidates. Maximal degree in co-relation 89481. Up to 11559 conditions per place. [2024-06-27 19:40:12,240 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 362 selfloop transitions, 33 changer transitions 0/404 dead transitions. [2024-06-27 19:40:12,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 404 transitions, 5631 flow [2024-06-27 19:40:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:40:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:40:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-27 19:40:12,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-27 19:40:12,241 INFO L175 Difference]: Start difference. First operand has 235 places, 374 transitions, 4722 flow. Second operand 6 states and 179 transitions. [2024-06-27 19:40:12,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 404 transitions, 5631 flow [2024-06-27 19:40:13,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 404 transitions, 5529 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:40:13,808 INFO L231 Difference]: Finished difference. Result has 236 places, 375 transitions, 4716 flow [2024-06-27 19:40:13,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4716, PETRI_PLACES=236, PETRI_TRANSITIONS=375} [2024-06-27 19:40:13,808 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 182 predicate places. [2024-06-27 19:40:13,809 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 375 transitions, 4716 flow [2024-06-27 19:40:13,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:13,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:13,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:13,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:40:13,809 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:13,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash -727179761, now seen corresponding path program 1 times [2024-06-27 19:40:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135108050] [2024-06-27 19:40:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:13,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135108050] [2024-06-27 19:40:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135108050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:13,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:13,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217652220] [2024-06-27 19:40:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:13,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:13,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:13,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:40:13,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 375 transitions, 4716 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:13,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:13,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:40:13,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:15,578 INFO L124 PetriNetUnfolderBase]: 8507/12459 cut-off events. [2024-06-27 19:40:15,578 INFO L125 PetriNetUnfolderBase]: For 626382/626396 co-relation queries the response was YES. [2024-06-27 19:40:15,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87892 conditions, 12459 events. 8507/12459 cut-off events. For 626382/626396 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73841 event pairs, 2505 based on Foata normal form. 17/12472 useless extension candidates. Maximal degree in co-relation 87784. Up to 11216 conditions per place. [2024-06-27 19:40:15,719 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 363 selfloop transitions, 41 changer transitions 0/413 dead transitions. [2024-06-27 19:40:15,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 413 transitions, 5685 flow [2024-06-27 19:40:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:40:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:40:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-27 19:40:15,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-06-27 19:40:15,720 INFO L175 Difference]: Start difference. First operand has 236 places, 375 transitions, 4716 flow. Second operand 6 states and 182 transitions. [2024-06-27 19:40:15,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 413 transitions, 5685 flow [2024-06-27 19:40:17,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 413 transitions, 5613 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:40:17,488 INFO L231 Difference]: Finished difference. Result has 239 places, 380 transitions, 4797 flow [2024-06-27 19:40:17,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4797, PETRI_PLACES=239, PETRI_TRANSITIONS=380} [2024-06-27 19:40:17,489 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 185 predicate places. [2024-06-27 19:40:17,489 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 380 transitions, 4797 flow [2024-06-27 19:40:17,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:17,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:17,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:17,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:40:17,489 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:17,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash -900760962, now seen corresponding path program 1 times [2024-06-27 19:40:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:17,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961687415] [2024-06-27 19:40:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:17,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:17,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961687415] [2024-06-27 19:40:17,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961687415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:17,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:17,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:40:17,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955876888] [2024-06-27 19:40:17,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:40:17,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:40:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:40:17,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:40:17,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 380 transitions, 4797 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:17,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:17,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:40:17,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:19,206 INFO L124 PetriNetUnfolderBase]: 7752/11548 cut-off events. [2024-06-27 19:40:19,206 INFO L125 PetriNetUnfolderBase]: For 693240/693397 co-relation queries the response was YES. [2024-06-27 19:40:19,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86244 conditions, 11548 events. 7752/11548 cut-off events. For 693240/693397 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70789 event pairs, 2364 based on Foata normal form. 65/11387 useless extension candidates. Maximal degree in co-relation 86134. Up to 10124 conditions per place. [2024-06-27 19:40:19,356 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 294 selfloop transitions, 41 changer transitions 0/395 dead transitions. [2024-06-27 19:40:19,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 395 transitions, 5553 flow [2024-06-27 19:40:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:40:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:40:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 19:40:19,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225490196078431 [2024-06-27 19:40:19,357 INFO L175 Difference]: Start difference. First operand has 239 places, 380 transitions, 4797 flow. Second operand 4 states and 127 transitions. [2024-06-27 19:40:19,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 395 transitions, 5553 flow [2024-06-27 19:40:20,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 395 transitions, 5503 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 19:40:20,998 INFO L231 Difference]: Finished difference. Result has 241 places, 384 transitions, 4913 flow [2024-06-27 19:40:20,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4913, PETRI_PLACES=241, PETRI_TRANSITIONS=384} [2024-06-27 19:40:20,999 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 187 predicate places. [2024-06-27 19:40:20,999 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 384 transitions, 4913 flow [2024-06-27 19:40:20,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:20,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:20,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:20,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:40:21,000 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:21,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash 738876346, now seen corresponding path program 2 times [2024-06-27 19:40:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:21,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955443772] [2024-06-27 19:40:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:21,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:21,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955443772] [2024-06-27 19:40:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955443772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:21,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:40:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113406620] [2024-06-27 19:40:21,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:40:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:40:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:40:21,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:40:21,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 384 transitions, 4913 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:21,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:21,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:40:21,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:22,828 INFO L124 PetriNetUnfolderBase]: 7736/11488 cut-off events. [2024-06-27 19:40:22,828 INFO L125 PetriNetUnfolderBase]: For 716309/716466 co-relation queries the response was YES. [2024-06-27 19:40:22,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87873 conditions, 11488 events. 7736/11488 cut-off events. For 716309/716466 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 69996 event pairs, 2364 based on Foata normal form. 65/11327 useless extension candidates. Maximal degree in co-relation 87761. Up to 10096 conditions per place. [2024-06-27 19:40:22,962 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 295 selfloop transitions, 45 changer transitions 0/400 dead transitions. [2024-06-27 19:40:22,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 400 transitions, 5689 flow [2024-06-27 19:40:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:40:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:40:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-27 19:40:22,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592156862745098 [2024-06-27 19:40:22,963 INFO L175 Difference]: Start difference. First operand has 241 places, 384 transitions, 4913 flow. Second operand 5 states and 151 transitions. [2024-06-27 19:40:22,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 400 transitions, 5689 flow [2024-06-27 19:40:24,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 400 transitions, 5569 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 19:40:24,226 INFO L231 Difference]: Finished difference. Result has 244 places, 388 transitions, 4964 flow [2024-06-27 19:40:24,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4799, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4964, PETRI_PLACES=244, PETRI_TRANSITIONS=388} [2024-06-27 19:40:24,227 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 190 predicate places. [2024-06-27 19:40:24,227 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 388 transitions, 4964 flow [2024-06-27 19:40:24,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:24,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:24,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:24,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:40:24,227 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:24,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:24,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1659691711, now seen corresponding path program 1 times [2024-06-27 19:40:24,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:24,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930379099] [2024-06-27 19:40:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:24,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:24,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930379099] [2024-06-27 19:40:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930379099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:24,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698050084] [2024-06-27 19:40:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:24,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:40:24,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 388 transitions, 4964 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) [2024-06-27 19:40:24,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:24,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:40:24,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:26,132 INFO L124 PetriNetUnfolderBase]: 8299/12372 cut-off events. [2024-06-27 19:40:26,132 INFO L125 PetriNetUnfolderBase]: For 713728/713734 co-relation queries the response was YES. [2024-06-27 19:40:26,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92844 conditions, 12372 events. 8299/12372 cut-off events. For 713728/713734 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 75510 event pairs, 2377 based on Foata normal form. 30/12397 useless extension candidates. Maximal degree in co-relation 92731. Up to 10750 conditions per place. [2024-06-27 19:40:26,299 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 383 selfloop transitions, 49 changer transitions 0/444 dead transitions. [2024-06-27 19:40:26,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 444 transitions, 6289 flow [2024-06-27 19:40:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-27 19:40:26,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:40:26,300 INFO L175 Difference]: Start difference. First operand has 244 places, 388 transitions, 4964 flow. Second operand 7 states and 221 transitions. [2024-06-27 19:40:26,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 444 transitions, 6289 flow [2024-06-27 19:40:27,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 444 transitions, 6156 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:40:28,000 INFO L231 Difference]: Finished difference. Result has 250 places, 399 transitions, 5108 flow [2024-06-27 19:40:28,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5108, PETRI_PLACES=250, PETRI_TRANSITIONS=399} [2024-06-27 19:40:28,000 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 196 predicate places. [2024-06-27 19:40:28,001 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 399 transitions, 5108 flow [2024-06-27 19:40:28,001 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) [2024-06-27 19:40:28,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:28,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:28,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:40:28,001 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:28,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash -930269383, now seen corresponding path program 2 times [2024-06-27 19:40:28,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:28,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155886417] [2024-06-27 19:40:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:28,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:28,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:28,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155886417] [2024-06-27 19:40:28,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155886417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:28,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:28,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:28,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197173976] [2024-06-27 19:40:28,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:28,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:28,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:28,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:40:28,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 399 transitions, 5108 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) [2024-06-27 19:40:28,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:28,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:40:28,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:30,034 INFO L124 PetriNetUnfolderBase]: 8455/12628 cut-off events. [2024-06-27 19:40:30,034 INFO L125 PetriNetUnfolderBase]: For 757393/757399 co-relation queries the response was YES. [2024-06-27 19:40:30,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96027 conditions, 12628 events. 8455/12628 cut-off events. For 757393/757399 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 77605 event pairs, 2617 based on Foata normal form. 38/12661 useless extension candidates. Maximal degree in co-relation 95911. Up to 11454 conditions per place. [2024-06-27 19:40:30,211 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 381 selfloop transitions, 42 changer transitions 0/435 dead transitions. [2024-06-27 19:40:30,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 435 transitions, 6102 flow [2024-06-27 19:40:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-27 19:40:30,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966386554621849 [2024-06-27 19:40:30,212 INFO L175 Difference]: Start difference. First operand has 250 places, 399 transitions, 5108 flow. Second operand 7 states and 213 transitions. [2024-06-27 19:40:30,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 435 transitions, 6102 flow [2024-06-27 19:40:31,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 435 transitions, 6017 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 19:40:31,764 INFO L231 Difference]: Finished difference. Result has 255 places, 401 transitions, 5161 flow [2024-06-27 19:40:31,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5161, PETRI_PLACES=255, PETRI_TRANSITIONS=401} [2024-06-27 19:40:31,764 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 201 predicate places. [2024-06-27 19:40:31,764 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 401 transitions, 5161 flow [2024-06-27 19:40:31,765 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) [2024-06-27 19:40:31,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:31,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:31,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:40:31,765 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:31,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1017109063, now seen corresponding path program 3 times [2024-06-27 19:40:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:31,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545112555] [2024-06-27 19:40:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:31,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:31,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545112555] [2024-06-27 19:40:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545112555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:31,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:31,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103178687] [2024-06-27 19:40:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:31,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:31,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:31,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:40:31,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 401 transitions, 5161 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) [2024-06-27 19:40:31,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:31,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:40:31,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:33,755 INFO L124 PetriNetUnfolderBase]: 8567/12800 cut-off events. [2024-06-27 19:40:33,755 INFO L125 PetriNetUnfolderBase]: For 779786/779792 co-relation queries the response was YES. [2024-06-27 19:40:33,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97687 conditions, 12800 events. 8567/12800 cut-off events. For 779786/779792 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 78932 event pairs, 2603 based on Foata normal form. 30/12825 useless extension candidates. Maximal degree in co-relation 97569. Up to 11452 conditions per place. [2024-06-27 19:40:33,936 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 384 selfloop transitions, 46 changer transitions 0/442 dead transitions. [2024-06-27 19:40:33,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 442 transitions, 6207 flow [2024-06-27 19:40:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-27 19:40:33,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6050420168067226 [2024-06-27 19:40:33,938 INFO L175 Difference]: Start difference. First operand has 255 places, 401 transitions, 5161 flow. Second operand 7 states and 216 transitions. [2024-06-27 19:40:33,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 442 transitions, 6207 flow [2024-06-27 19:40:35,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 442 transitions, 6107 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:40:35,566 INFO L231 Difference]: Finished difference. Result has 258 places, 405 transitions, 5240 flow [2024-06-27 19:40:35,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5240, PETRI_PLACES=258, PETRI_TRANSITIONS=405} [2024-06-27 19:40:35,567 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 204 predicate places. [2024-06-27 19:40:35,567 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 405 transitions, 5240 flow [2024-06-27 19:40:35,567 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) [2024-06-27 19:40:35,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:35,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:35,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:40:35,567 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:35,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -53569275, now seen corresponding path program 4 times [2024-06-27 19:40:35,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:35,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118456142] [2024-06-27 19:40:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:35,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:35,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118456142] [2024-06-27 19:40:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118456142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:35,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:35,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015306711] [2024-06-27 19:40:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:35,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:40:35,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 405 transitions, 5240 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) [2024-06-27 19:40:35,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:35,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:40:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:38,169 INFO L124 PetriNetUnfolderBase]: 8725/13040 cut-off events. [2024-06-27 19:40:38,169 INFO L125 PetriNetUnfolderBase]: For 822064/822072 co-relation queries the response was YES. [2024-06-27 19:40:38,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99901 conditions, 13040 events. 8725/13040 cut-off events. For 822064/822072 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 80666 event pairs, 2645 based on Foata normal form. 40/13077 useless extension candidates. Maximal degree in co-relation 99781. Up to 11898 conditions per place. [2024-06-27 19:40:38,543 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 39 changer transitions 0/445 dead transitions. [2024-06-27 19:40:38,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 445 transitions, 6270 flow [2024-06-27 19:40:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 19:40:38,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:40:38,544 INFO L175 Difference]: Start difference. First operand has 258 places, 405 transitions, 5240 flow. Second operand 8 states and 238 transitions. [2024-06-27 19:40:38,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 445 transitions, 6270 flow [2024-06-27 19:40:39,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 445 transitions, 6195 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:40:39,901 INFO L231 Difference]: Finished difference. Result has 263 places, 407 transitions, 5303 flow [2024-06-27 19:40:39,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5165, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5303, PETRI_PLACES=263, PETRI_TRANSITIONS=407} [2024-06-27 19:40:39,902 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2024-06-27 19:40:39,902 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 407 transitions, 5303 flow [2024-06-27 19:40:39,902 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) [2024-06-27 19:40:39,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:39,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:39,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:40:39,902 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:39,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:39,902 INFO L85 PathProgramCache]: Analyzing trace with hash -58931655, now seen corresponding path program 5 times [2024-06-27 19:40:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:39,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315337083] [2024-06-27 19:40:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:40,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:40,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315337083] [2024-06-27 19:40:40,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315337083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:40,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:40,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:40,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463973096] [2024-06-27 19:40:40,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:40,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:40:40,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 407 transitions, 5303 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) [2024-06-27 19:40:40,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:40,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:40:40,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:42,423 INFO L124 PetriNetUnfolderBase]: 8815/13200 cut-off events. [2024-06-27 19:40:42,423 INFO L125 PetriNetUnfolderBase]: For 845136/845142 co-relation queries the response was YES. [2024-06-27 19:40:42,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101165 conditions, 13200 events. 8815/13200 cut-off events. For 845136/845142 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 81999 event pairs, 2687 based on Foata normal form. 38/13233 useless extension candidates. Maximal degree in co-relation 101043. Up to 12042 conditions per place. [2024-06-27 19:40:42,578 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 392 selfloop transitions, 35 changer transitions 0/439 dead transitions. [2024-06-27 19:40:42,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 439 transitions, 6305 flow [2024-06-27 19:40:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:40:42,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:40:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-27 19:40:42,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 19:40:42,579 INFO L175 Difference]: Start difference. First operand has 263 places, 407 transitions, 5303 flow. Second operand 6 states and 187 transitions. [2024-06-27 19:40:42,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 439 transitions, 6305 flow [2024-06-27 19:40:44,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 439 transitions, 6205 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:44,057 INFO L231 Difference]: Finished difference. Result has 263 places, 409 transitions, 5337 flow [2024-06-27 19:40:44,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5337, PETRI_PLACES=263, PETRI_TRANSITIONS=409} [2024-06-27 19:40:44,057 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 209 predicate places. [2024-06-27 19:40:44,057 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 409 transitions, 5337 flow [2024-06-27 19:40:44,057 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) [2024-06-27 19:40:44,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:44,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:44,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:40:44,057 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:44,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash -59079525, now seen corresponding path program 6 times [2024-06-27 19:40:44,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:44,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042451364] [2024-06-27 19:40:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:44,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:44,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:44,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042451364] [2024-06-27 19:40:44,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042451364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:44,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:44,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:44,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491292735] [2024-06-27 19:40:44,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:44,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:44,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:44,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:44,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:44,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:40:44,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 409 transitions, 5337 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) [2024-06-27 19:40:44,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:44,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:40:44,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:46,678 INFO L124 PetriNetUnfolderBase]: 8763/13124 cut-off events. [2024-06-27 19:40:46,679 INFO L125 PetriNetUnfolderBase]: For 832109/832115 co-relation queries the response was YES. [2024-06-27 19:40:46,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99756 conditions, 13124 events. 8763/13124 cut-off events. For 832109/832115 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 81405 event pairs, 2439 based on Foata normal form. 30/13149 useless extension candidates. Maximal degree in co-relation 99633. Up to 11548 conditions per place. [2024-06-27 19:40:46,831 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 392 selfloop transitions, 43 changer transitions 0/447 dead transitions. [2024-06-27 19:40:46,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 447 transitions, 6353 flow [2024-06-27 19:40:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:40:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:40:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-27 19:40:46,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.630718954248366 [2024-06-27 19:40:46,833 INFO L175 Difference]: Start difference. First operand has 263 places, 409 transitions, 5337 flow. Second operand 6 states and 193 transitions. [2024-06-27 19:40:46,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 447 transitions, 6353 flow [2024-06-27 19:40:48,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 447 transitions, 6241 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:40:48,304 INFO L231 Difference]: Finished difference. Result has 266 places, 411 transitions, 5363 flow [2024-06-27 19:40:48,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5363, PETRI_PLACES=266, PETRI_TRANSITIONS=411} [2024-06-27 19:40:48,304 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 212 predicate places. [2024-06-27 19:40:48,304 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 411 transitions, 5363 flow [2024-06-27 19:40:48,305 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) [2024-06-27 19:40:48,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:48,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:40:48,305 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:48,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash -53354073, now seen corresponding path program 1 times [2024-06-27 19:40:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:48,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297729139] [2024-06-27 19:40:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:48,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:48,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297729139] [2024-06-27 19:40:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297729139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:48,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:48,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:48,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164620392] [2024-06-27 19:40:48,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:48,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:48,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:48,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-06-27 19:40:48,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 411 transitions, 5363 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) [2024-06-27 19:40:48,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:48,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-06-27 19:40:48,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:50,929 INFO L124 PetriNetUnfolderBase]: 8713/13044 cut-off events. [2024-06-27 19:40:50,930 INFO L125 PetriNetUnfolderBase]: For 824867/824875 co-relation queries the response was YES. [2024-06-27 19:40:51,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98460 conditions, 13044 events. 8713/13044 cut-off events. For 824867/824875 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 80694 event pairs, 2522 based on Foata normal form. 32/13073 useless extension candidates. Maximal degree in co-relation 98335. Up to 11476 conditions per place. [2024-06-27 19:40:51,088 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 394 selfloop transitions, 48 changer transitions 0/454 dead transitions. [2024-06-27 19:40:51,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 454 transitions, 6419 flow [2024-06-27 19:40:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-27 19:40:51,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906862745098039 [2024-06-27 19:40:51,089 INFO L175 Difference]: Start difference. First operand has 266 places, 411 transitions, 5363 flow. Second operand 8 states and 241 transitions. [2024-06-27 19:40:51,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 454 transitions, 6419 flow [2024-06-27 19:40:52,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 454 transitions, 6260 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:40:52,513 INFO L231 Difference]: Finished difference. Result has 269 places, 413 transitions, 5351 flow [2024-06-27 19:40:52,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5204, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5351, PETRI_PLACES=269, PETRI_TRANSITIONS=413} [2024-06-27 19:40:52,513 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 215 predicate places. [2024-06-27 19:40:52,513 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 413 transitions, 5351 flow [2024-06-27 19:40:52,513 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) [2024-06-27 19:40:52,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:52,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:52,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:40:52,514 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:52,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1085796766, now seen corresponding path program 1 times [2024-06-27 19:40:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:52,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627780364] [2024-06-27 19:40:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:52,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:52,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627780364] [2024-06-27 19:40:52,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627780364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:52,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:52,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:40:52,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736826864] [2024-06-27 19:40:52,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:52,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:40:52,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:40:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:40:52,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:40:52,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 413 transitions, 5351 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:52,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:52,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:40:52,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:54,907 INFO L124 PetriNetUnfolderBase]: 8413/12770 cut-off events. [2024-06-27 19:40:54,908 INFO L125 PetriNetUnfolderBase]: For 826002/826009 co-relation queries the response was YES. [2024-06-27 19:40:55,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96394 conditions, 12770 events. 8413/12770 cut-off events. For 826002/826009 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 81022 event pairs, 2591 based on Foata normal form. 9/12743 useless extension candidates. Maximal degree in co-relation 96269. Up to 11470 conditions per place. [2024-06-27 19:40:55,069 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 350 selfloop transitions, 48 changer transitions 0/437 dead transitions. [2024-06-27 19:40:55,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 437 transitions, 6457 flow [2024-06-27 19:40:55,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:40:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:40:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-27 19:40:55,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-27 19:40:55,070 INFO L175 Difference]: Start difference. First operand has 269 places, 413 transitions, 5351 flow. Second operand 5 states and 155 transitions. [2024-06-27 19:40:55,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 437 transitions, 6457 flow [2024-06-27 19:40:56,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 437 transitions, 6336 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:56,998 INFO L231 Difference]: Finished difference. Result has 268 places, 421 transitions, 5506 flow [2024-06-27 19:40:56,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5230, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5506, PETRI_PLACES=268, PETRI_TRANSITIONS=421} [2024-06-27 19:40:56,998 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 214 predicate places. [2024-06-27 19:40:56,998 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 421 transitions, 5506 flow [2024-06-27 19:40:56,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:56,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:56,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:40:56,999 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:40:56,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1062583966, now seen corresponding path program 2 times [2024-06-27 19:40:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:56,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717763134] [2024-06-27 19:40:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:56,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:57,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:57,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717763134] [2024-06-27 19:40:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717763134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:57,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:57,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:40:57,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832086644] [2024-06-27 19:40:57,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:57,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:40:57,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:40:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:40:57,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:40:57,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 421 transitions, 5506 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:57,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:57,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:40:57,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:59,279 INFO L124 PetriNetUnfolderBase]: 8399/12752 cut-off events. [2024-06-27 19:40:59,279 INFO L125 PetriNetUnfolderBase]: For 851382/851389 co-relation queries the response was YES. [2024-06-27 19:40:59,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97223 conditions, 12752 events. 8399/12752 cut-off events. For 851382/851389 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 80847 event pairs, 2591 based on Foata normal form. 9/12725 useless extension candidates. Maximal degree in co-relation 97097. Up to 11470 conditions per place. [2024-06-27 19:40:59,471 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 352 selfloop transitions, 44 changer transitions 0/435 dead transitions. [2024-06-27 19:40:59,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 435 transitions, 6334 flow [2024-06-27 19:40:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:40:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:40:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-27 19:40:59,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6372549019607843 [2024-06-27 19:40:59,472 INFO L175 Difference]: Start difference. First operand has 268 places, 421 transitions, 5506 flow. Second operand 4 states and 130 transitions. [2024-06-27 19:40:59,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 435 transitions, 6334 flow [2024-06-27 19:41:01,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 435 transitions, 6177 flow, removed 62 selfloop flow, removed 1 redundant places. [2024-06-27 19:41:01,263 INFO L231 Difference]: Finished difference. Result has 271 places, 421 transitions, 5458 flow [2024-06-27 19:41:01,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5458, PETRI_PLACES=271, PETRI_TRANSITIONS=421} [2024-06-27 19:41:01,264 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 217 predicate places. [2024-06-27 19:41:01,264 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 421 transitions, 5458 flow [2024-06-27 19:41:01,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:01,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:01,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:41:01,264 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:41:01,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash 738897178, now seen corresponding path program 1 times [2024-06-27 19:41:01,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626778655] [2024-06-27 19:41:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:01,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:01,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626778655] [2024-06-27 19:41:01,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626778655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:01,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:01,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:41:01,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979638526] [2024-06-27 19:41:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:01,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:41:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:41:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:41:01,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 19:41:01,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 421 transitions, 5458 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:01,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:01,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 19:41:01,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:03,485 INFO L124 PetriNetUnfolderBase]: 8575/12759 cut-off events. [2024-06-27 19:41:03,485 INFO L125 PetriNetUnfolderBase]: For 947372/947511 co-relation queries the response was YES. [2024-06-27 19:41:03,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99123 conditions, 12759 events. 8575/12759 cut-off events. For 947372/947511 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 79307 event pairs, 2443 based on Foata normal form. 46/12572 useless extension candidates. Maximal degree in co-relation 98995. Up to 11396 conditions per place. [2024-06-27 19:41:03,643 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 357 selfloop transitions, 21 changer transitions 0/439 dead transitions. [2024-06-27 19:41:03,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 439 transitions, 6320 flow [2024-06-27 19:41:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:41:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:41:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 19:41:03,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843137254901961 [2024-06-27 19:41:03,644 INFO L175 Difference]: Start difference. First operand has 271 places, 421 transitions, 5458 flow. Second operand 5 states and 149 transitions. [2024-06-27 19:41:03,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 439 transitions, 6320 flow [2024-06-27 19:41:05,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 439 transitions, 6232 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:41:05,828 INFO L231 Difference]: Finished difference. Result has 273 places, 424 transitions, 5470 flow [2024-06-27 19:41:05,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5370, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5470, PETRI_PLACES=273, PETRI_TRANSITIONS=424} [2024-06-27 19:41:05,829 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 219 predicate places. [2024-06-27 19:41:05,829 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 424 transitions, 5470 flow [2024-06-27 19:41:05,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:05,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:05,829 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] [2024-06-27 19:41:05,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:41:05,829 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:41:05,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:05,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2083720007, now seen corresponding path program 1 times [2024-06-27 19:41:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:05,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884070755] [2024-06-27 19:41:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:05,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:05,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884070755] [2024-06-27 19:41:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884070755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:05,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:05,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:41:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411371607] [2024-06-27 19:41:05,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:05,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:41:05,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:41:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:41:06,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:41:06,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 424 transitions, 5470 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:06,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:06,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:41:06,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:08,369 INFO L124 PetriNetUnfolderBase]: 9414/13785 cut-off events. [2024-06-27 19:41:08,369 INFO L125 PetriNetUnfolderBase]: For 897300/897330 co-relation queries the response was YES. [2024-06-27 19:41:08,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104256 conditions, 13785 events. 9414/13785 cut-off events. For 897300/897330 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 83246 event pairs, 2696 based on Foata normal form. 25/13805 useless extension candidates. Maximal degree in co-relation 104127. Up to 12220 conditions per place. [2024-06-27 19:41:08,543 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 373 selfloop transitions, 143 changer transitions 0/525 dead transitions. [2024-06-27 19:41:08,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 525 transitions, 7597 flow [2024-06-27 19:41:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-27 19:41:08,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151960784313726 [2024-06-27 19:41:08,544 INFO L175 Difference]: Start difference. First operand has 273 places, 424 transitions, 5470 flow. Second operand 8 states and 251 transitions. [2024-06-27 19:41:08,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 525 transitions, 7597 flow [2024-06-27 19:41:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 525 transitions, 7519 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:41:10,558 INFO L231 Difference]: Finished difference. Result has 281 places, 465 transitions, 6301 flow [2024-06-27 19:41:10,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=5394, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6301, PETRI_PLACES=281, PETRI_TRANSITIONS=465} [2024-06-27 19:41:10,559 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 227 predicate places. [2024-06-27 19:41:10,559 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 465 transitions, 6301 flow [2024-06-27 19:41:10,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:10,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:10,559 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] [2024-06-27 19:41:10,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:41:10,559 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:41:10,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:10,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1257818891, now seen corresponding path program 2 times [2024-06-27 19:41:10,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:10,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077821604] [2024-06-27 19:41:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:10,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:10,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077821604] [2024-06-27 19:41:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077821604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:10,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:10,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:41:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632061531] [2024-06-27 19:41:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:10,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:41:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:41:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:41:10,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:41:10,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 465 transitions, 6301 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:10,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:10,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:41:10,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:13,331 INFO L124 PetriNetUnfolderBase]: 9453/13853 cut-off events. [2024-06-27 19:41:13,331 INFO L125 PetriNetUnfolderBase]: For 940812/940849 co-relation queries the response was YES. [2024-06-27 19:41:13,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108116 conditions, 13853 events. 9453/13853 cut-off events. For 940812/940849 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 83796 event pairs, 2646 based on Foata normal form. 35/13884 useless extension candidates. Maximal degree in co-relation 107983. Up to 12656 conditions per place. [2024-06-27 19:41:13,505 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 404 selfloop transitions, 105 changer transitions 0/518 dead transitions. [2024-06-27 19:41:13,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 518 transitions, 7802 flow [2024-06-27 19:41:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-27 19:41:13,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2024-06-27 19:41:13,506 INFO L175 Difference]: Start difference. First operand has 281 places, 465 transitions, 6301 flow. Second operand 8 states and 244 transitions. [2024-06-27 19:41:13,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 518 transitions, 7802 flow [2024-06-27 19:41:15,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 518 transitions, 7540 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-06-27 19:41:15,244 INFO L231 Difference]: Finished difference. Result has 288 places, 474 transitions, 6421 flow [2024-06-27 19:41:15,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=6095, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6421, PETRI_PLACES=288, PETRI_TRANSITIONS=474} [2024-06-27 19:41:15,244 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 234 predicate places. [2024-06-27 19:41:15,244 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 474 transitions, 6421 flow [2024-06-27 19:41:15,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:15,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:15,244 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] [2024-06-27 19:41:15,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:41:15,245 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 19:41:15,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1257813311, now seen corresponding path program 3 times [2024-06-27 19:41:15,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:15,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270188485] [2024-06-27 19:41:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:15,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:15,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:15,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270188485] [2024-06-27 19:41:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270188485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:15,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:15,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:41:15,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506782272] [2024-06-27 19:41:15,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:15,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:41:15,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:41:15,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:41:15,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-06-27 19:41:15,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 474 transitions, 6421 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:15,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:15,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-06-27 19:41:15,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand