./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:06:37,634 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:06:37,709 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:06:37,712 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:06:37,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:06:37,726 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:06:37,726 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:06:37,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:06:37,727 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:06:37,727 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:06:37,728 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:06:37,728 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:06:37,728 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:06:37,729 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:06:37,729 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:06:37,729 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:06:37,729 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:06:37,730 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:06:37,730 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:06:37,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:06:37,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:06:37,731 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:06:37,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:06:37,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:06:37,731 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:06:37,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:06:37,732 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:06:37,732 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:06:37,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:06:37,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:06:37,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:06:37,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:06:37,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:06:37,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:06:37,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:06:37,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:06:37,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:06:37,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:06:37,734 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:06:37,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:06:37,735 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:06:37,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:06:37,735 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:06:37,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:06:37,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:06:37,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:06:37,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:06:37,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:06:37,933 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:06:37,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:06:38,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:06:39,227 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:06:39,227 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:06:39,243 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92f3714be/7d3742dd834340b9a75b8430d557832d/FLAG1476c36f1 [2024-06-04 14:06:39,253 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92f3714be/7d3742dd834340b9a75b8430d557832d [2024-06-04 14:06:39,256 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:06:39,256 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:06:39,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 14:06:39,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:06:39,329 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:06:39,330 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:06:39,330 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:06:39,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:06:39,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:06:39" (1/2) ... [2024-06-04 14:06:39,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e8cb2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:39, skipping insertion in model container [2024-06-04 14:06:39,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:06:39" (1/2) ... [2024-06-04 14:06:39,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e6dcdfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:06:39, skipping insertion in model container [2024-06-04 14:06:39,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:06:39" (2/2) ... [2024-06-04 14:06:39,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e8cb2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39, skipping insertion in model container [2024-06-04 14:06:39,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:06:39" (2/2) ... [2024-06-04 14:06:39,337 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:06:39,381 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:06:39,382 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 14:06:39,382 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 14:06:39,382 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 14:06:39,382 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:06:39,383 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-04 14:06:39,410 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:06:39,706 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:06:39,717 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:06:39,795 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:06:39,829 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:06:39,829 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39 WrapperNode [2024-06-04 14:06:39,829 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:06:39,830 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:06:39,830 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:06:39,830 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:06:39,836 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 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,846 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 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,869 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-04 14:06:39,870 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:06:39,871 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:06:39,871 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:06:39,871 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:06:39,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,893 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,908 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]. [2024-06-04 14:06:39,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,944 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:06:39,945 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:06:39,945 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:06:39,945 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:06:39,946 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (1/1) ... [2024-06-04 14:06:39,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:06:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:06:39,974 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) [2024-06-04 14:06:39,993 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 [2024-06-04 14:06:40,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:06:40,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:06:40,010 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:06:40,010 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:06:40,010 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:06:40,010 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:06:40,010 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:06:40,010 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:06:40,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:06:40,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:06:40,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:06:40,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:06:40,013 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:06:40,099 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:06:40,101 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:06:40,289 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:06:40,289 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:06:40,356 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:06:40,356 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:06:40,356 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:06:40 BoogieIcfgContainer [2024-06-04 14:06:40,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:06:40,358 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:06:40,358 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:06:40,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:06:40,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:06:39" (1/4) ... [2024-06-04 14:06:40,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a27be28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:06:40, skipping insertion in model container [2024-06-04 14:06:40,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:06:39" (2/4) ... [2024-06-04 14:06:40,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a27be28 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:06:40, skipping insertion in model container [2024-06-04 14:06:40,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:06:39" (3/4) ... [2024-06-04 14:06:40,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a27be28 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:06:40, skipping insertion in model container [2024-06-04 14:06:40,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:06:40" (4/4) ... [2024-06-04 14:06:40,370 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 14:06:40,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:06:40,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:06:40,384 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:06:40,432 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:06:40,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-04 14:06:40,496 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-04 14:06:40,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:06:40,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:06:40,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-04 14:06:40,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-04 14:06:40,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:06:40,521 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;@7aa8cc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:06:40,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:06:40,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:06:40,527 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:06:40,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:06:40,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:40,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:06:40,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:40,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1909711783, now seen corresponding path program 1 times [2024-06-04 14:06:40,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065740097] [2024-06-04 14:06:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:41,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:41,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065740097] [2024-06-04 14:06:41,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065740097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:41,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:41,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:06:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758975602] [2024-06-04 14:06:41,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:41,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:06:41,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:06:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:06:41,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-04 14:06:41,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:41,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:41,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-04 14:06:41,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:41,248 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-04 14:06:41,249 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-04 14:06:41,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3931 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-04 14:06:41,259 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-04 14:06:41,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-04 14:06:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:06:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:06:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-04 14:06:41,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-04 14:06:41,270 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-04 14:06:41,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-04 14:06:41,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:41,275 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-04 14:06:41,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-04 14:06:41,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-04 14:06:41,279 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-04 14:06:41,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:41,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:41,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:41,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:06:41,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:41,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1086635544, now seen corresponding path program 1 times [2024-06-04 14:06:41,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:41,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770800579] [2024-06-04 14:06:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:41,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770800579] [2024-06-04 14:06:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770800579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:41,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399654750] [2024-06-04 14:06:41,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:41,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:41,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:41,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:41,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:41,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:41,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:41,652 INFO L124 PetriNetUnfolderBase]: 754/1255 cut-off events. [2024-06-04 14:06:41,652 INFO L125 PetriNetUnfolderBase]: For 194/197 co-relation queries the response was YES. [2024-06-04 14:06:41,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 1255 events. 754/1255 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6082 event pairs, 318 based on Foata normal form. 5/1258 useless extension candidates. Maximal degree in co-relation 2844. Up to 1124 conditions per place. [2024-06-04 14:06:41,661 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:06:41,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 254 flow [2024-06-04 14:06:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 14:06:41,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-04 14:06:41,665 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 101 transitions. [2024-06-04 14:06:41,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 254 flow [2024-06-04 14:06:41,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:41,668 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-04 14:06:41,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-04 14:06:41,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-04 14:06:41,670 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-04 14:06:41,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:41,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:41,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:41,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:06:41,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:41,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2108259387, now seen corresponding path program 1 times [2024-06-04 14:06:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:41,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969113610] [2024-06-04 14:06:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:41,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:41,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:41,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969113610] [2024-06-04 14:06:41,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969113610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:41,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:41,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490814245] [2024-06-04 14:06:41,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:41,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:41,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:41,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:41,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:41,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:41,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:41,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:42,015 INFO L124 PetriNetUnfolderBase]: 745/1240 cut-off events. [2024-06-04 14:06:42,016 INFO L125 PetriNetUnfolderBase]: For 582/593 co-relation queries the response was YES. [2024-06-04 14:06:42,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 1240 events. 745/1240 cut-off events. For 582/593 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6014 event pairs, 218 based on Foata normal form. 14/1252 useless extension candidates. Maximal degree in co-relation 3155. Up to 1079 conditions per place. [2024-06-04 14:06:42,022 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 46 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-04 14:06:42,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 314 flow [2024-06-04 14:06:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 14:06:42,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:06:42,026 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 120 transitions. [2024-06-04 14:06:42,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 314 flow [2024-06-04 14:06:42,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 312 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:42,029 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-04 14:06:42,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-04 14:06:42,031 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-04 14:06:42,031 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-04 14:06:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:42,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:42,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:06:42,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:42,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2090825248, now seen corresponding path program 1 times [2024-06-04 14:06:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394441549] [2024-06-04 14:06:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:42,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394441549] [2024-06-04 14:06:42,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394441549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:42,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:42,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:42,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805457700] [2024-06-04 14:06:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:42,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:42,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:42,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:42,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:42,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:42,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:42,338 INFO L124 PetriNetUnfolderBase]: 747/1229 cut-off events. [2024-06-04 14:06:42,339 INFO L125 PetriNetUnfolderBase]: For 1101/1104 co-relation queries the response was YES. [2024-06-04 14:06:42,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3432 conditions, 1229 events. 747/1229 cut-off events. For 1101/1104 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5848 event pairs, 254 based on Foata normal form. 5/1229 useless extension candidates. Maximal degree in co-relation 3411. Up to 1105 conditions per place. [2024-06-04 14:06:42,346 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-04 14:06:42,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 393 flow [2024-06-04 14:06:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 14:06:42,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 14:06:42,348 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 100 transitions. [2024-06-04 14:06:42,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 393 flow [2024-06-04 14:06:42,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 368 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:42,351 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-04 14:06:42,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-04 14:06:42,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-04 14:06:42,352 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-04 14:06:42,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:42,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:42,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:06:42,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:42,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash -104084423, now seen corresponding path program 1 times [2024-06-04 14:06:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655530208] [2024-06-04 14:06:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:42,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:42,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:42,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655530208] [2024-06-04 14:06:42,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655530208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:42,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:42,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:42,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288473790] [2024-06-04 14:06:42,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:42,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:42,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:42,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:42,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:42,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:42,633 INFO L124 PetriNetUnfolderBase]: 758/1286 cut-off events. [2024-06-04 14:06:42,633 INFO L125 PetriNetUnfolderBase]: For 1869/1886 co-relation queries the response was YES. [2024-06-04 14:06:42,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1286 events. 758/1286 cut-off events. For 1869/1886 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6349 event pairs, 280 based on Foata normal form. 14/1296 useless extension candidates. Maximal degree in co-relation 3988. Up to 1085 conditions per place. [2024-06-04 14:06:42,642 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-04 14:06:42,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 490 flow [2024-06-04 14:06:42,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 14:06:42,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-04 14:06:42,644 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 5 states and 123 transitions. [2024-06-04 14:06:42,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 490 flow [2024-06-04 14:06:42,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 484 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:42,648 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 317 flow [2024-06-04 14:06:42,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-04 14:06:42,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-04 14:06:42,649 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 317 flow [2024-06-04 14:06:42,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:42,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:42,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:06:42,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:42,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash -671905851, now seen corresponding path program 2 times [2024-06-04 14:06:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:42,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751366849] [2024-06-04 14:06:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:42,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:42,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:42,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751366849] [2024-06-04 14:06:42,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751366849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:42,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:42,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:42,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969764084] [2024-06-04 14:06:42,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:42,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:42,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:42,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:42,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:42,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:42,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:42,941 INFO L124 PetriNetUnfolderBase]: 753/1279 cut-off events. [2024-06-04 14:06:42,941 INFO L125 PetriNetUnfolderBase]: For 2782/2799 co-relation queries the response was YES. [2024-06-04 14:06:42,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 1279 events. 753/1279 cut-off events. For 2782/2799 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6327 event pairs, 280 based on Foata normal form. 14/1289 useless extension candidates. Maximal degree in co-relation 4309. Up to 1089 conditions per place. [2024-06-04 14:06:42,949 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-06-04 14:06:42,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 488 flow [2024-06-04 14:06:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 14:06:42,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-04 14:06:42,951 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 317 flow. Second operand 4 states and 101 transitions. [2024-06-04 14:06:42,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 488 flow [2024-06-04 14:06:42,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 457 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:42,956 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 324 flow [2024-06-04 14:06:42,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-04 14:06:42,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-04 14:06:42,957 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 324 flow [2024-06-04 14:06:42,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:42,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:42,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:42,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:06:42,958 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:42,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:42,958 INFO L85 PathProgramCache]: Analyzing trace with hash -671905665, now seen corresponding path program 1 times [2024-06-04 14:06:42,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:42,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365121531] [2024-06-04 14:06:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:42,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:43,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:43,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365121531] [2024-06-04 14:06:43,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365121531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:43,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:43,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:43,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134522997] [2024-06-04 14:06:43,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:43,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:43,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:43,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:43,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:43,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:43,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:43,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:43,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:43,230 INFO L124 PetriNetUnfolderBase]: 795/1325 cut-off events. [2024-06-04 14:06:43,230 INFO L125 PetriNetUnfolderBase]: For 3474/3491 co-relation queries the response was YES. [2024-06-04 14:06:43,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1325 events. 795/1325 cut-off events. For 3474/3491 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6511 event pairs, 253 based on Foata normal form. 15/1336 useless extension candidates. Maximal degree in co-relation 4652. Up to 1116 conditions per place. [2024-06-04 14:06:43,239 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 50 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-06-04 14:06:43,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 569 flow [2024-06-04 14:06:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 14:06:43,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:06:43,240 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 324 flow. Second operand 5 states and 120 transitions. [2024-06-04 14:06:43,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 569 flow [2024-06-04 14:06:43,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 543 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:43,247 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 433 flow [2024-06-04 14:06:43,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2024-06-04 14:06:43,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-04 14:06:43,248 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 433 flow [2024-06-04 14:06:43,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:43,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:43,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:06:43,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:43,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1318642083, now seen corresponding path program 2 times [2024-06-04 14:06:43,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:43,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094856626] [2024-06-04 14:06:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:43,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:43,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:43,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094856626] [2024-06-04 14:06:43,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094856626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:43,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:43,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:43,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211642921] [2024-06-04 14:06:43,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:43,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:43,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:43,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:43,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 433 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:43,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:43,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:43,502 INFO L124 PetriNetUnfolderBase]: 805/1336 cut-off events. [2024-06-04 14:06:43,502 INFO L125 PetriNetUnfolderBase]: For 4876/4896 co-relation queries the response was YES. [2024-06-04 14:06:43,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5304 conditions, 1336 events. 805/1336 cut-off events. For 4876/4896 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6534 event pairs, 267 based on Foata normal form. 17/1343 useless extension candidates. Maximal degree in co-relation 5274. Up to 1092 conditions per place. [2024-06-04 14:06:43,511 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 31 changer transitions 0/94 dead transitions. [2024-06-04 14:06:43,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 763 flow [2024-06-04 14:06:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 14:06:43,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 14:06:43,512 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 433 flow. Second operand 5 states and 124 transitions. [2024-06-04 14:06:43,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 763 flow [2024-06-04 14:06:43,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 732 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:43,533 INFO L231 Difference]: Finished difference. Result has 67 places, 76 transitions, 584 flow [2024-06-04 14:06:43,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=584, PETRI_PLACES=67, PETRI_TRANSITIONS=76} [2024-06-04 14:06:43,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-04 14:06:43,533 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 76 transitions, 584 flow [2024-06-04 14:06:43,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:43,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:43,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:06:43,534 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:43,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:43,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1318633155, now seen corresponding path program 1 times [2024-06-04 14:06:43,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:43,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695042300] [2024-06-04 14:06:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:43,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695042300] [2024-06-04 14:06:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695042300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:43,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:43,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54739632] [2024-06-04 14:06:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:43,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:43,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:43,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:43,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 76 transitions, 584 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:43,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:43,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:43,797 INFO L124 PetriNetUnfolderBase]: 835/1397 cut-off events. [2024-06-04 14:06:43,797 INFO L125 PetriNetUnfolderBase]: For 5766/5775 co-relation queries the response was YES. [2024-06-04 14:06:43,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 1397 events. 835/1397 cut-off events. For 5766/5775 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6949 event pairs, 242 based on Foata normal form. 18/1410 useless extension candidates. Maximal degree in co-relation 5865. Up to 1175 conditions per place. [2024-06-04 14:06:43,806 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2024-06-04 14:06:43,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 898 flow [2024-06-04 14:06:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 14:06:43,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-04 14:06:43,807 INFO L175 Difference]: Start difference. First operand has 67 places, 76 transitions, 584 flow. Second operand 5 states and 123 transitions. [2024-06-04 14:06:43,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 898 flow [2024-06-04 14:06:43,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 862 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-04 14:06:43,816 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 608 flow [2024-06-04 14:06:43,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=608, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2024-06-04 14:06:43,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-04 14:06:43,817 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 608 flow [2024-06-04 14:06:43,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:43,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:43,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:06:43,817 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:43,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2655179, now seen corresponding path program 1 times [2024-06-04 14:06:43,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:43,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959833412] [2024-06-04 14:06:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:43,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:43,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959833412] [2024-06-04 14:06:43,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959833412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:43,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:43,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:06:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041168313] [2024-06-04 14:06:43,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:43,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:06:43,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:06:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:06:43,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-04 14:06:43,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 608 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:43,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:43,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-04 14:06:43,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:44,033 INFO L124 PetriNetUnfolderBase]: 760/1285 cut-off events. [2024-06-04 14:06:44,033 INFO L125 PetriNetUnfolderBase]: For 5934/5939 co-relation queries the response was YES. [2024-06-04 14:06:44,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 1285 events. 760/1285 cut-off events. For 5934/5939 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6406 event pairs, 246 based on Foata normal form. 6/1270 useless extension candidates. Maximal degree in co-relation 5371. Up to 1115 conditions per place. [2024-06-04 14:06:44,043 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 66 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-06-04 14:06:44,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 803 flow [2024-06-04 14:06:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:06:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:06:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-04 14:06:44,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-04 14:06:44,044 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 608 flow. Second operand 4 states and 97 transitions. [2024-06-04 14:06:44,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 803 flow [2024-06-04 14:06:44,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 769 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:44,050 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 639 flow [2024-06-04 14:06:44,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=639, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-04 14:06:44,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-04 14:06:44,051 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 639 flow [2024-06-04 14:06:44,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:44,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:44,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:44,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:06:44,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:44,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1068351291, now seen corresponding path program 1 times [2024-06-04 14:06:44,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:44,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214531499] [2024-06-04 14:06:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:44,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214531499] [2024-06-04 14:06:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214531499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:44,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:44,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751118776] [2024-06-04 14:06:44,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:44,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:44,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:44,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:44,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:44,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 639 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:44,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:44,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:44,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:44,363 INFO L124 PetriNetUnfolderBase]: 886/1494 cut-off events. [2024-06-04 14:06:44,363 INFO L125 PetriNetUnfolderBase]: For 6899/6919 co-relation queries the response was YES. [2024-06-04 14:06:44,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1494 events. 886/1494 cut-off events. For 6899/6919 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7624 event pairs, 249 based on Foata normal form. 17/1507 useless extension candidates. Maximal degree in co-relation 6244. Up to 1152 conditions per place. [2024-06-04 14:06:44,373 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-04 14:06:44,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 1157 flow [2024-06-04 14:06:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:06:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:06:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 14:06:44,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-04 14:06:44,375 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 639 flow. Second operand 9 states and 211 transitions. [2024-06-04 14:06:44,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 1157 flow [2024-06-04 14:06:44,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 130 transitions, 1145 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 14:06:44,383 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 833 flow [2024-06-04 14:06:44,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=833, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-04 14:06:44,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-04 14:06:44,384 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 833 flow [2024-06-04 14:06:44,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:44,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:44,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:44,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:06:44,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:44,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:44,385 INFO L85 PathProgramCache]: Analyzing trace with hash 645761787, now seen corresponding path program 2 times [2024-06-04 14:06:44,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:44,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941453398] [2024-06-04 14:06:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:44,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:44,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941453398] [2024-06-04 14:06:44,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941453398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:44,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:44,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289731287] [2024-06-04 14:06:44,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:44,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:44,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 833 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:44,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:44,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:44,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:44,722 INFO L124 PetriNetUnfolderBase]: 912/1541 cut-off events. [2024-06-04 14:06:44,722 INFO L125 PetriNetUnfolderBase]: For 9498/9518 co-relation queries the response was YES. [2024-06-04 14:06:44,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7191 conditions, 1541 events. 912/1541 cut-off events. For 9498/9518 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7928 event pairs, 250 based on Foata normal form. 17/1554 useless extension candidates. Maximal degree in co-relation 7149. Up to 1213 conditions per place. [2024-06-04 14:06:44,732 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-04 14:06:44,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1349 flow [2024-06-04 14:06:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:06:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:06:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:06:44,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-04 14:06:44,733 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 833 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:06:44,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1349 flow [2024-06-04 14:06:44,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1244 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:44,745 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 939 flow [2024-06-04 14:06:44,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=939, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-04 14:06:44,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-04 14:06:44,746 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 939 flow [2024-06-04 14:06:44,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:44,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:44,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:44,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:06:44,747 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:44,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash 645756207, now seen corresponding path program 3 times [2024-06-04 14:06:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:44,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568550797] [2024-06-04 14:06:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:44,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568550797] [2024-06-04 14:06:44,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568550797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:44,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:44,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:44,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203822351] [2024-06-04 14:06:44,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:44,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:44,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:44,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:44,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 939 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:44,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:44,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:44,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:45,084 INFO L124 PetriNetUnfolderBase]: 906/1533 cut-off events. [2024-06-04 14:06:45,085 INFO L125 PetriNetUnfolderBase]: For 10801/10818 co-relation queries the response was YES. [2024-06-04 14:06:45,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 1533 events. 906/1533 cut-off events. For 10801/10818 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7895 event pairs, 250 based on Foata normal form. 15/1544 useless extension candidates. Maximal degree in co-relation 7363. Up to 1209 conditions per place. [2024-06-04 14:06:45,095 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 83 selfloop transitions, 37 changer transitions 0/126 dead transitions. [2024-06-04 14:06:45,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 126 transitions, 1291 flow [2024-06-04 14:06:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 14:06:45,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 14:06:45,096 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 939 flow. Second operand 6 states and 150 transitions. [2024-06-04 14:06:45,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 126 transitions, 1291 flow [2024-06-04 14:06:45,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 1212 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:45,114 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 944 flow [2024-06-04 14:06:45,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=944, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-04 14:06:45,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-04 14:06:45,115 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 944 flow [2024-06-04 14:06:45,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:45,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:45,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:45,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:06:45,116 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:45,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:45,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2071769309, now seen corresponding path program 4 times [2024-06-04 14:06:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892096041] [2024-06-04 14:06:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892096041] [2024-06-04 14:06:45,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892096041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:45,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:45,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:45,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208291007] [2024-06-04 14:06:45,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:45,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:45,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:45,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:45,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:45,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 944 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:45,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:45,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:45,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:45,439 INFO L124 PetriNetUnfolderBase]: 930/1569 cut-off events. [2024-06-04 14:06:45,439 INFO L125 PetriNetUnfolderBase]: For 12408/12425 co-relation queries the response was YES. [2024-06-04 14:06:45,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7798 conditions, 1569 events. 930/1569 cut-off events. For 12408/12425 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8107 event pairs, 255 based on Foata normal form. 15/1574 useless extension candidates. Maximal degree in co-relation 7751. Up to 1171 conditions per place. [2024-06-04 14:06:45,449 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 82 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-04 14:06:45,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 148 transitions, 1528 flow [2024-06-04 14:06:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:06:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:06:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 14:06:45,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-04 14:06:45,451 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 944 flow. Second operand 8 states and 194 transitions. [2024-06-04 14:06:45,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 148 transitions, 1528 flow [2024-06-04 14:06:45,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 148 transitions, 1454 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:45,463 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 1144 flow [2024-06-04 14:06:45,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1144, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-04 14:06:45,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-04 14:06:45,464 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 1144 flow [2024-06-04 14:06:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:45,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:45,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:45,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:06:45,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:45,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash 505754820, now seen corresponding path program 1 times [2024-06-04 14:06:45,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:45,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067363997] [2024-06-04 14:06:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:45,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:45,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:45,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067363997] [2024-06-04 14:06:45,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067363997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:45,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:45,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:45,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626920787] [2024-06-04 14:06:45,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:45,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:45,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:45,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:45,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:45,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 1144 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:45,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:45,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:45,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:45,797 INFO L124 PetriNetUnfolderBase]: 947/1598 cut-off events. [2024-06-04 14:06:45,797 INFO L125 PetriNetUnfolderBase]: For 15451/15468 co-relation queries the response was YES. [2024-06-04 14:06:45,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 1598 events. 947/1598 cut-off events. For 15451/15468 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8291 event pairs, 164 based on Foata normal form. 16/1610 useless extension candidates. Maximal degree in co-relation 8520. Up to 1278 conditions per place. [2024-06-04 14:06:45,806 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 23 changer transitions 0/143 dead transitions. [2024-06-04 14:06:45,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 143 transitions, 1604 flow [2024-06-04 14:06:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:06:45,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:06:45,807 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 1144 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:06:45,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 143 transitions, 1604 flow [2024-06-04 14:06:45,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1500 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:45,823 INFO L231 Difference]: Finished difference. Result has 99 places, 117 transitions, 1169 flow [2024-06-04 14:06:45,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1169, PETRI_PLACES=99, PETRI_TRANSITIONS=117} [2024-06-04 14:06:45,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-04 14:06:45,824 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 117 transitions, 1169 flow [2024-06-04 14:06:45,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:45,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:45,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:45,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:06:45,824 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:45,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash 619434300, now seen corresponding path program 2 times [2024-06-04 14:06:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:45,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787579446] [2024-06-04 14:06:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:45,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:45,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:45,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787579446] [2024-06-04 14:06:45,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787579446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:45,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:45,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:45,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879161398] [2024-06-04 14:06:45,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:45,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:45,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:45,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:45,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:45,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 117 transitions, 1169 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:45,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:45,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:45,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:46,119 INFO L124 PetriNetUnfolderBase]: 964/1625 cut-off events. [2024-06-04 14:06:46,120 INFO L125 PetriNetUnfolderBase]: For 16927/16944 co-relation queries the response was YES. [2024-06-04 14:06:46,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1625 events. 964/1625 cut-off events. For 16927/16944 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8440 event pairs, 235 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 8781. Up to 1369 conditions per place. [2024-06-04 14:06:46,131 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-06-04 14:06:46,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1537 flow [2024-06-04 14:06:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 14:06:46,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-04 14:06:46,132 INFO L175 Difference]: Start difference. First operand has 99 places, 117 transitions, 1169 flow. Second operand 6 states and 141 transitions. [2024-06-04 14:06:46,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1537 flow [2024-06-04 14:06:46,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1464 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:46,156 INFO L231 Difference]: Finished difference. Result has 103 places, 119 transitions, 1185 flow [2024-06-04 14:06:46,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1185, PETRI_PLACES=103, PETRI_TRANSITIONS=119} [2024-06-04 14:06:46,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-04 14:06:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 119 transitions, 1185 flow [2024-06-04 14:06:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:46,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:46,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:46,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:06:46,158 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:46,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1456397884, now seen corresponding path program 3 times [2024-06-04 14:06:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982374583] [2024-06-04 14:06:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:46,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:46,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982374583] [2024-06-04 14:06:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982374583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:46,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:46,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:46,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170298541] [2024-06-04 14:06:46,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:46,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:46,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:46,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:46,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 119 transitions, 1185 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:46,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:46,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:46,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:46,480 INFO L124 PetriNetUnfolderBase]: 956/1613 cut-off events. [2024-06-04 14:06:46,480 INFO L125 PetriNetUnfolderBase]: For 17752/17769 co-relation queries the response was YES. [2024-06-04 14:06:46,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 1613 events. 956/1613 cut-off events. For 17752/17769 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8358 event pairs, 162 based on Foata normal form. 16/1625 useless extension candidates. Maximal degree in co-relation 8674. Up to 1336 conditions per place. [2024-06-04 14:06:46,491 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 113 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-04 14:06:46,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1497 flow [2024-06-04 14:06:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 14:06:46,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-04 14:06:46,493 INFO L175 Difference]: Start difference. First operand has 103 places, 119 transitions, 1185 flow. Second operand 5 states and 122 transitions. [2024-06-04 14:06:46,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1497 flow [2024-06-04 14:06:46,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1426 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:46,514 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 1162 flow [2024-06-04 14:06:46,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1162, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-04 14:06:46,515 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-04 14:06:46,515 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 1162 flow [2024-06-04 14:06:46,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:46,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:06:46,515 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:46,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1456213186, now seen corresponding path program 1 times [2024-06-04 14:06:46,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376982911] [2024-06-04 14:06:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376982911] [2024-06-04 14:06:46,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376982911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:46,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:46,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730333035] [2024-06-04 14:06:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:46,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:46,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:46,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:46,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 1162 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:46,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:46,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:46,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:46,852 INFO L124 PetriNetUnfolderBase]: 1011/1700 cut-off events. [2024-06-04 14:06:46,852 INFO L125 PetriNetUnfolderBase]: For 20528/20545 co-relation queries the response was YES. [2024-06-04 14:06:46,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9127 conditions, 1700 events. 1011/1700 cut-off events. For 20528/20545 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8878 event pairs, 213 based on Foata normal form. 24/1720 useless extension candidates. Maximal degree in co-relation 9073. Up to 1334 conditions per place. [2024-06-04 14:06:46,865 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-06-04 14:06:46,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1574 flow [2024-06-04 14:06:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:06:46,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:06:46,866 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 1162 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:06:46,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1574 flow [2024-06-04 14:06:46,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1529 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:46,891 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 1221 flow [2024-06-04 14:06:46,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1221, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2024-06-04 14:06:46,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-04 14:06:46,892 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 1221 flow [2024-06-04 14:06:46,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:46,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:46,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:46,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:06:46,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:46,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash -136175702, now seen corresponding path program 1 times [2024-06-04 14:06:46,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:46,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819133829] [2024-06-04 14:06:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:46,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:46,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819133829] [2024-06-04 14:06:46,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819133829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:46,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:46,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059137749] [2024-06-04 14:06:46,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:46,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:46,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:47,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-04 14:06:47,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 1221 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:47,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:47,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-04 14:06:47,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:47,189 INFO L124 PetriNetUnfolderBase]: 937/1589 cut-off events. [2024-06-04 14:06:47,189 INFO L125 PetriNetUnfolderBase]: For 20714/20723 co-relation queries the response was YES. [2024-06-04 14:06:47,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8854 conditions, 1589 events. 937/1589 cut-off events. For 20714/20723 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8325 event pairs, 214 based on Foata normal form. 8/1576 useless extension candidates. Maximal degree in co-relation 8799. Up to 1337 conditions per place. [2024-06-04 14:06:47,198 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 96 selfloop transitions, 25 changer transitions 0/133 dead transitions. [2024-06-04 14:06:47,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1493 flow [2024-06-04 14:06:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:47,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 14:06:47,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:06:47,200 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 1221 flow. Second operand 5 states and 120 transitions. [2024-06-04 14:06:47,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1493 flow [2024-06-04 14:06:47,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1417 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:47,222 INFO L231 Difference]: Finished difference. Result has 107 places, 121 transitions, 1211 flow [2024-06-04 14:06:47,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1211, PETRI_PLACES=107, PETRI_TRANSITIONS=121} [2024-06-04 14:06:47,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-04 14:06:47,222 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 121 transitions, 1211 flow [2024-06-04 14:06:47,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:47,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:47,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:06:47,224 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:47,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1817930080, now seen corresponding path program 2 times [2024-06-04 14:06:47,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919539439] [2024-06-04 14:06:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:47,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:47,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919539439] [2024-06-04 14:06:47,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919539439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:47,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:47,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:47,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682263753] [2024-06-04 14:06:47,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:47,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:47,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:47,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:47,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 121 transitions, 1211 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:47,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:47,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:47,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:47,543 INFO L124 PetriNetUnfolderBase]: 1033/1729 cut-off events. [2024-06-04 14:06:47,543 INFO L125 PetriNetUnfolderBase]: For 24049/24066 co-relation queries the response was YES. [2024-06-04 14:06:47,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1729 events. 1033/1729 cut-off events. For 24049/24066 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9028 event pairs, 244 based on Foata normal form. 24/1743 useless extension candidates. Maximal degree in co-relation 9420. Up to 1402 conditions per place. [2024-06-04 14:06:47,555 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 33 changer transitions 0/149 dead transitions. [2024-06-04 14:06:47,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 1689 flow [2024-06-04 14:06:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:06:47,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-04 14:06:47,556 INFO L175 Difference]: Start difference. First operand has 107 places, 121 transitions, 1211 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:06:47,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 1689 flow [2024-06-04 14:06:47,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 149 transitions, 1626 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:47,585 INFO L231 Difference]: Finished difference. Result has 108 places, 123 transitions, 1264 flow [2024-06-04 14:06:47,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1264, PETRI_PLACES=108, PETRI_TRANSITIONS=123} [2024-06-04 14:06:47,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-04 14:06:47,586 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 123 transitions, 1264 flow [2024-06-04 14:06:47,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:47,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:47,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:47,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:06:47,586 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:47,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash -191082084, now seen corresponding path program 3 times [2024-06-04 14:06:47,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:47,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757141657] [2024-06-04 14:06:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757141657] [2024-06-04 14:06:47,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757141657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:47,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:47,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:06:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526648770] [2024-06-04 14:06:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:06:47,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:06:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:06:47,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:47,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:47,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:47,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:47,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:47,911 INFO L124 PetriNetUnfolderBase]: 1099/1831 cut-off events. [2024-06-04 14:06:47,912 INFO L125 PetriNetUnfolderBase]: For 25561/25578 co-relation queries the response was YES. [2024-06-04 14:06:47,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 1831 events. 1099/1831 cut-off events. For 25561/25578 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9661 event pairs, 225 based on Foata normal form. 24/1845 useless extension candidates. Maximal degree in co-relation 10067. Up to 1285 conditions per place. [2024-06-04 14:06:47,924 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-04 14:06:47,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 157 transitions, 1834 flow [2024-06-04 14:06:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 14:06:47,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-04 14:06:47,925 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 1264 flow. Second operand 6 states and 151 transitions. [2024-06-04 14:06:47,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 157 transitions, 1834 flow [2024-06-04 14:06:47,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 1744 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:47,956 INFO L231 Difference]: Finished difference. Result has 110 places, 126 transitions, 1311 flow [2024-06-04 14:06:47,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=110, PETRI_TRANSITIONS=126} [2024-06-04 14:06:47,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-04 14:06:47,957 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 126 transitions, 1311 flow [2024-06-04 14:06:47,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-04 14:06:47,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:47,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:47,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:06:47,958 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:47,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1743306966, now seen corresponding path program 2 times [2024-06-04 14:06:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:47,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171051623] [2024-06-04 14:06:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:47,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:48,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:48,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171051623] [2024-06-04 14:06:48,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171051623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:48,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:48,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:48,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837645932] [2024-06-04 14:06:48,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:48,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:48,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:48,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:48,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:48,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-04 14:06:48,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 126 transitions, 1311 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:48,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-04 14:06:48,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:48,227 INFO L124 PetriNetUnfolderBase]: 1047/1751 cut-off events. [2024-06-04 14:06:48,228 INFO L125 PetriNetUnfolderBase]: For 26339/26348 co-relation queries the response was YES. [2024-06-04 14:06:48,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 1751 events. 1047/1751 cut-off events. For 26339/26348 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9315 event pairs, 262 based on Foata normal form. 8/1734 useless extension candidates. Maximal degree in co-relation 9920. Up to 1481 conditions per place. [2024-06-04 14:06:48,240 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 92 selfloop transitions, 36 changer transitions 0/140 dead transitions. [2024-06-04 14:06:48,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1706 flow [2024-06-04 14:06:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 14:06:48,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:06:48,242 INFO L175 Difference]: Start difference. First operand has 110 places, 126 transitions, 1311 flow. Second operand 5 states and 120 transitions. [2024-06-04 14:06:48,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1706 flow [2024-06-04 14:06:48,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1633 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:48,269 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 1354 flow [2024-06-04 14:06:48,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1354, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-04 14:06:48,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-04 14:06:48,270 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 1354 flow [2024-06-04 14:06:48,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:48,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:48,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:06:48,271 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:48,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1349607368, now seen corresponding path program 1 times [2024-06-04 14:06:48,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:48,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458467866] [2024-06-04 14:06:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:48,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:48,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:48,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458467866] [2024-06-04 14:06:48,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458467866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:48,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:48,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:06:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718468265] [2024-06-04 14:06:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:48,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:06:48,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:06:48,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:06:48,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-04 14:06:48,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 1354 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:48,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-04 14:06:48,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:48,578 INFO L124 PetriNetUnfolderBase]: 1061/1783 cut-off events. [2024-06-04 14:06:48,578 INFO L125 PetriNetUnfolderBase]: For 28557/28562 co-relation queries the response was YES. [2024-06-04 14:06:48,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10074 conditions, 1783 events. 1061/1783 cut-off events. For 28557/28562 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9489 event pairs, 247 based on Foata normal form. 15/1779 useless extension candidates. Maximal degree in co-relation 10015. Up to 1534 conditions per place. [2024-06-04 14:06:48,589 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 118 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-06-04 14:06:48,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1684 flow [2024-06-04 14:06:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 14:06:48,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-04 14:06:48,591 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 1354 flow. Second operand 5 states and 118 transitions. [2024-06-04 14:06:48,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1684 flow [2024-06-04 14:06:48,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 144 transitions, 1579 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:48,617 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1307 flow [2024-06-04 14:06:48,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1307, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-04 14:06:48,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-04 14:06:48,618 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1307 flow [2024-06-04 14:06:48,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:48,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:48,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:06:48,618 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:48,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:48,619 INFO L85 PathProgramCache]: Analyzing trace with hash -288866032, now seen corresponding path program 1 times [2024-06-04 14:06:48,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:48,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229708760] [2024-06-04 14:06:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:48,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:48,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229708760] [2024-06-04 14:06:48,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229708760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:48,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:48,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:48,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162743395] [2024-06-04 14:06:48,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:48,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:48,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:48,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:48,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:48,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1307 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:48,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:48,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:48,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:49,138 INFO L124 PetriNetUnfolderBase]: 1679/2880 cut-off events. [2024-06-04 14:06:49,138 INFO L125 PetriNetUnfolderBase]: For 56905/56922 co-relation queries the response was YES. [2024-06-04 14:06:49,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16090 conditions, 2880 events. 1679/2880 cut-off events. For 56905/56922 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17470 event pairs, 441 based on Foata normal form. 48/2924 useless extension candidates. Maximal degree in co-relation 16032. Up to 1290 conditions per place. [2024-06-04 14:06:49,158 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 138 selfloop transitions, 49 changer transitions 0/193 dead transitions. [2024-06-04 14:06:49,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 2157 flow [2024-06-04 14:06:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:06:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:06:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-04 14:06:49,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-04 14:06:49,161 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1307 flow. Second operand 9 states and 227 transitions. [2024-06-04 14:06:49,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 2157 flow [2024-06-04 14:06:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 193 transitions, 2121 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:49,214 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1463 flow [2024-06-04 14:06:49,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1463, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-04 14:06:49,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-04 14:06:49,215 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1463 flow [2024-06-04 14:06:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:49,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:49,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:06:49,216 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:49,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1499594706, now seen corresponding path program 2 times [2024-06-04 14:06:49,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:49,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849615116] [2024-06-04 14:06:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:49,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:49,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:49,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849615116] [2024-06-04 14:06:49,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849615116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:49,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:49,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:49,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575633473] [2024-06-04 14:06:49,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:49,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:49,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:49,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:49,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1463 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:49,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:49,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:49,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:49,839 INFO L124 PetriNetUnfolderBase]: 2069/3572 cut-off events. [2024-06-04 14:06:49,839 INFO L125 PetriNetUnfolderBase]: For 80352/80369 co-relation queries the response was YES. [2024-06-04 14:06:49,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20587 conditions, 3572 events. 2069/3572 cut-off events. For 80352/80369 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23114 event pairs, 724 based on Foata normal form. 48/3616 useless extension candidates. Maximal degree in co-relation 20526. Up to 2374 conditions per place. [2024-06-04 14:06:49,862 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 137 selfloop transitions, 49 changer transitions 0/192 dead transitions. [2024-06-04 14:06:49,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 192 transitions, 2275 flow [2024-06-04 14:06:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:06:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:06:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-04 14:06:49,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-06-04 14:06:49,864 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1463 flow. Second operand 10 states and 243 transitions. [2024-06-04 14:06:49,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 192 transitions, 2275 flow [2024-06-04 14:06:49,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 192 transitions, 2171 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:49,931 INFO L231 Difference]: Finished difference. Result has 128 places, 136 transitions, 1528 flow [2024-06-04 14:06:49,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1528, PETRI_PLACES=128, PETRI_TRANSITIONS=136} [2024-06-04 14:06:49,932 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-04 14:06:49,932 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 136 transitions, 1528 flow [2024-06-04 14:06:49,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:49,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:49,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:49,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:06:49,933 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:49,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1412755026, now seen corresponding path program 3 times [2024-06-04 14:06:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:49,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865606820] [2024-06-04 14:06:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:50,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865606820] [2024-06-04 14:06:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865606820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:50,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781725626] [2024-06-04 14:06:50,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:50,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:50,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:50,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:50,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 136 transitions, 1528 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:50,575 INFO L124 PetriNetUnfolderBase]: 2142/3715 cut-off events. [2024-06-04 14:06:50,575 INFO L125 PetriNetUnfolderBase]: For 84258/84275 co-relation queries the response was YES. [2024-06-04 14:06:50,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20957 conditions, 3715 events. 2142/3715 cut-off events. For 84258/84275 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24247 event pairs, 855 based on Foata normal form. 54/3763 useless extension candidates. Maximal degree in co-relation 20894. Up to 2945 conditions per place. [2024-06-04 14:06:50,600 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 49 changer transitions 0/181 dead transitions. [2024-06-04 14:06:50,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 181 transitions, 2144 flow [2024-06-04 14:06:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:06:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:06:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-04 14:06:50,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-04 14:06:50,602 INFO L175 Difference]: Start difference. First operand has 128 places, 136 transitions, 1528 flow. Second operand 10 states and 233 transitions. [2024-06-04 14:06:50,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 181 transitions, 2144 flow [2024-06-04 14:06:50,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2025 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:06:50,673 INFO L231 Difference]: Finished difference. Result has 131 places, 137 transitions, 1551 flow [2024-06-04 14:06:50,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1551, PETRI_PLACES=131, PETRI_TRANSITIONS=137} [2024-06-04 14:06:50,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-04 14:06:50,674 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 137 transitions, 1551 flow [2024-06-04 14:06:50,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:50,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:50,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:50,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:06:50,675 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:50,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:50,675 INFO L85 PathProgramCache]: Analyzing trace with hash 73223106, now seen corresponding path program 1 times [2024-06-04 14:06:50,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:50,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447839529] [2024-06-04 14:06:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:50,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:50,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:50,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447839529] [2024-06-04 14:06:50,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447839529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:50,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:50,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:50,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286435567] [2024-06-04 14:06:50,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:50,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:50,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:50,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:50,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:50,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:50,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 137 transitions, 1551 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:50,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:50,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:50,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:51,200 INFO L124 PetriNetUnfolderBase]: 2147/3724 cut-off events. [2024-06-04 14:06:51,200 INFO L125 PetriNetUnfolderBase]: For 76297/76308 co-relation queries the response was YES. [2024-06-04 14:06:51,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21115 conditions, 3724 events. 2147/3724 cut-off events. For 76297/76308 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24285 event pairs, 853 based on Foata normal form. 9/3731 useless extension candidates. Maximal degree in co-relation 21051. Up to 3375 conditions per place. [2024-06-04 14:06:51,222 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 141 selfloop transitions, 19 changer transitions 0/166 dead transitions. [2024-06-04 14:06:51,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 166 transitions, 2135 flow [2024-06-04 14:06:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-04 14:06:51,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-04 14:06:51,224 INFO L175 Difference]: Start difference. First operand has 131 places, 137 transitions, 1551 flow. Second operand 7 states and 151 transitions. [2024-06-04 14:06:51,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 166 transitions, 2135 flow [2024-06-04 14:06:51,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1995 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 14:06:51,302 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1641 flow [2024-06-04 14:06:51,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1641, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-04 14:06:51,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-04 14:06:51,303 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1641 flow [2024-06-04 14:06:51,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:51,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:51,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:51,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:06:51,303 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:51,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash -473022442, now seen corresponding path program 4 times [2024-06-04 14:06:51,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:51,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864011761] [2024-06-04 14:06:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:51,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:51,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864011761] [2024-06-04 14:06:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864011761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:51,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:51,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707048877] [2024-06-04 14:06:51,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:51,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:51,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1641 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:51,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:51,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:51,980 INFO L124 PetriNetUnfolderBase]: 2281/3932 cut-off events. [2024-06-04 14:06:51,980 INFO L125 PetriNetUnfolderBase]: For 97106/97123 co-relation queries the response was YES. [2024-06-04 14:06:51,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22003 conditions, 3932 events. 2281/3932 cut-off events. For 97106/97123 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25827 event pairs, 888 based on Foata normal form. 54/3978 useless extension candidates. Maximal degree in co-relation 21937. Up to 3264 conditions per place. [2024-06-04 14:06:52,008 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 51 changer transitions 3/186 dead transitions. [2024-06-04 14:06:52,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 186 transitions, 2203 flow [2024-06-04 14:06:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:06:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:06:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 14:06:52,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-04 14:06:52,009 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1641 flow. Second operand 9 states and 212 transitions. [2024-06-04 14:06:52,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 186 transitions, 2203 flow [2024-06-04 14:06:52,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 186 transitions, 2176 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 14:06:52,089 INFO L231 Difference]: Finished difference. Result has 138 places, 147 transitions, 1749 flow [2024-06-04 14:06:52,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1749, PETRI_PLACES=138, PETRI_TRANSITIONS=147} [2024-06-04 14:06:52,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-04 14:06:52,089 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 147 transitions, 1749 flow [2024-06-04 14:06:52,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:52,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:52,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:52,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:06:52,090 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:52,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2096454830, now seen corresponding path program 5 times [2024-06-04 14:06:52,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153517792] [2024-06-04 14:06:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:52,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153517792] [2024-06-04 14:06:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153517792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:52,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:52,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881462730] [2024-06-04 14:06:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:52,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:52,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:52,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 147 transitions, 1749 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:52,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:52,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:52,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:52,801 INFO L124 PetriNetUnfolderBase]: 2405/4178 cut-off events. [2024-06-04 14:06:52,801 INFO L125 PetriNetUnfolderBase]: For 104255/104272 co-relation queries the response was YES. [2024-06-04 14:06:52,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23291 conditions, 4178 events. 2405/4178 cut-off events. For 104255/104272 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27873 event pairs, 967 based on Foata normal form. 54/4228 useless extension candidates. Maximal degree in co-relation 23223. Up to 3434 conditions per place. [2024-06-04 14:06:52,834 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 129 selfloop transitions, 46 changer transitions 0/181 dead transitions. [2024-06-04 14:06:52,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 181 transitions, 2293 flow [2024-06-04 14:06:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:06:52,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-04 14:06:52,836 INFO L175 Difference]: Start difference. First operand has 138 places, 147 transitions, 1749 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:06:52,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 181 transitions, 2293 flow [2024-06-04 14:06:52,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 181 transitions, 2164 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:06:52,951 INFO L231 Difference]: Finished difference. Result has 138 places, 148 transitions, 1760 flow [2024-06-04 14:06:52,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1760, PETRI_PLACES=138, PETRI_TRANSITIONS=148} [2024-06-04 14:06:52,952 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-04 14:06:52,952 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 148 transitions, 1760 flow [2024-06-04 14:06:52,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:52,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:52,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:06:52,952 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:52,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2096306960, now seen corresponding path program 6 times [2024-06-04 14:06:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:52,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341667044] [2024-06-04 14:06:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:53,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341667044] [2024-06-04 14:06:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341667044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:53,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:53,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:53,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529698137] [2024-06-04 14:06:53,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:53,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:53,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:53,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:53,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 148 transitions, 1760 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:53,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:53,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:53,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:53,621 INFO L124 PetriNetUnfolderBase]: 2475/4332 cut-off events. [2024-06-04 14:06:53,621 INFO L125 PetriNetUnfolderBase]: For 105250/105267 co-relation queries the response was YES. [2024-06-04 14:06:53,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23421 conditions, 4332 events. 2475/4332 cut-off events. For 105250/105267 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29405 event pairs, 851 based on Foata normal form. 48/4376 useless extension candidates. Maximal degree in co-relation 23352. Up to 2675 conditions per place. [2024-06-04 14:06:53,650 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 137 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-04 14:06:53,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 190 transitions, 2438 flow [2024-06-04 14:06:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:06:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:06:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:06:53,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-04 14:06:53,651 INFO L175 Difference]: Start difference. First operand has 138 places, 148 transitions, 1760 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:06:53,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 190 transitions, 2438 flow [2024-06-04 14:06:53,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 190 transitions, 2318 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:53,743 INFO L231 Difference]: Finished difference. Result has 141 places, 150 transitions, 1824 flow [2024-06-04 14:06:53,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1824, PETRI_PLACES=141, PETRI_TRANSITIONS=150} [2024-06-04 14:06:53,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-04 14:06:53,743 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 1824 flow [2024-06-04 14:06:53,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:53,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:53,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:53,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:06:53,744 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:53,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2102032412, now seen corresponding path program 1 times [2024-06-04 14:06:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:53,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173616829] [2024-06-04 14:06:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173616829] [2024-06-04 14:06:53,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173616829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:53,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:53,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558698752] [2024-06-04 14:06:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:53,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:53,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:53,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 1824 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:53,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:53,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:53,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:54,407 INFO L124 PetriNetUnfolderBase]: 2584/4521 cut-off events. [2024-06-04 14:06:54,408 INFO L125 PetriNetUnfolderBase]: For 114412/114429 co-relation queries the response was YES. [2024-06-04 14:06:54,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24406 conditions, 4521 events. 2584/4521 cut-off events. For 114412/114429 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31060 event pairs, 908 based on Foata normal form. 48/4563 useless extension candidates. Maximal degree in co-relation 24335. Up to 3238 conditions per place. [2024-06-04 14:06:54,439 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 129 selfloop transitions, 55 changer transitions 5/195 dead transitions. [2024-06-04 14:06:54,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 2452 flow [2024-06-04 14:06:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:06:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:06:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 14:06:54,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-04 14:06:54,440 INFO L175 Difference]: Start difference. First operand has 141 places, 150 transitions, 1824 flow. Second operand 9 states and 217 transitions. [2024-06-04 14:06:54,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 2452 flow [2024-06-04 14:06:54,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 195 transitions, 2311 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 14:06:54,567 INFO L231 Difference]: Finished difference. Result has 145 places, 149 transitions, 1817 flow [2024-06-04 14:06:54,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1817, PETRI_PLACES=145, PETRI_TRANSITIONS=149} [2024-06-04 14:06:54,568 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-04 14:06:54,568 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 149 transitions, 1817 flow [2024-06-04 14:06:54,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:54,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:54,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:54,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:06:54,568 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:54,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:54,569 INFO L85 PathProgramCache]: Analyzing trace with hash 73521636, now seen corresponding path program 2 times [2024-06-04 14:06:54,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:54,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906572247] [2024-06-04 14:06:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:54,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:54,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:54,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906572247] [2024-06-04 14:06:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906572247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:54,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:54,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032109009] [2024-06-04 14:06:54,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:54,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:54,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 149 transitions, 1817 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:54,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:54,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:54,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:55,046 INFO L124 PetriNetUnfolderBase]: 2407/4220 cut-off events. [2024-06-04 14:06:55,046 INFO L125 PetriNetUnfolderBase]: For 101398/101398 co-relation queries the response was YES. [2024-06-04 14:06:55,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 4220 events. 2407/4220 cut-off events. For 101398/101398 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28467 event pairs, 992 based on Foata normal form. 1/4217 useless extension candidates. Maximal degree in co-relation 23107. Up to 3849 conditions per place. [2024-06-04 14:06:55,073 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 18 changer transitions 0/159 dead transitions. [2024-06-04 14:06:55,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 159 transitions, 2152 flow [2024-06-04 14:06:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:06:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:06:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-04 14:06:55,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-04 14:06:55,074 INFO L175 Difference]: Start difference. First operand has 145 places, 149 transitions, 1817 flow. Second operand 5 states and 112 transitions. [2024-06-04 14:06:55,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 159 transitions, 2152 flow [2024-06-04 14:06:55,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 159 transitions, 2004 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 14:06:55,176 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1711 flow [2024-06-04 14:06:55,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1711, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-06-04 14:06:55,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-04 14:06:55,176 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1711 flow [2024-06-04 14:06:55,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:55,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:55,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:55,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:06:55,177 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:55,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1880735352, now seen corresponding path program 7 times [2024-06-04 14:06:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:55,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330405147] [2024-06-04 14:06:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:55,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:55,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330405147] [2024-06-04 14:06:55,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330405147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:55,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:55,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:55,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532584144] [2024-06-04 14:06:55,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:55,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:55,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:55,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:55,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1711 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:55,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:55,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:55,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:55,829 INFO L124 PetriNetUnfolderBase]: 2516/4402 cut-off events. [2024-06-04 14:06:55,829 INFO L125 PetriNetUnfolderBase]: For 125496/125513 co-relation queries the response was YES. [2024-06-04 14:06:55,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23653 conditions, 4402 events. 2516/4402 cut-off events. For 125496/125513 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29967 event pairs, 1035 based on Foata normal form. 54/4444 useless extension candidates. Maximal degree in co-relation 23580. Up to 3637 conditions per place. [2024-06-04 14:06:55,852 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 68 changer transitions 3/195 dead transitions. [2024-06-04 14:06:55,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 195 transitions, 2517 flow [2024-06-04 14:06:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:06:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:06:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-04 14:06:55,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-04 14:06:55,854 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1711 flow. Second operand 9 states and 218 transitions. [2024-06-04 14:06:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 195 transitions, 2517 flow [2024-06-04 14:06:55,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 195 transitions, 2481 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:55,973 INFO L231 Difference]: Finished difference. Result has 148 places, 149 transitions, 1859 flow [2024-06-04 14:06:55,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1859, PETRI_PLACES=148, PETRI_TRANSITIONS=149} [2024-06-04 14:06:55,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-04 14:06:55,973 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 149 transitions, 1859 flow [2024-06-04 14:06:55,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:55,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:55,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:55,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:06:55,974 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:55,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:55,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1894273666, now seen corresponding path program 2 times [2024-06-04 14:06:55,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:55,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88284512] [2024-06-04 14:06:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:55,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:56,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88284512] [2024-06-04 14:06:56,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88284512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:56,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:56,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:56,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707863742] [2024-06-04 14:06:56,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:56,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:56,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:56,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:56,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:56,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 149 transitions, 1859 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:56,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:56,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:56,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:56,629 INFO L124 PetriNetUnfolderBase]: 2615/4601 cut-off events. [2024-06-04 14:06:56,630 INFO L125 PetriNetUnfolderBase]: For 133684/133701 co-relation queries the response was YES. [2024-06-04 14:06:56,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24926 conditions, 4601 events. 2615/4601 cut-off events. For 133684/133701 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31756 event pairs, 1035 based on Foata normal form. 48/4637 useless extension candidates. Maximal degree in co-relation 24852. Up to 3573 conditions per place. [2024-06-04 14:06:56,659 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 123 selfloop transitions, 70 changer transitions 6/205 dead transitions. [2024-06-04 14:06:56,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 205 transitions, 2741 flow [2024-06-04 14:06:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:06:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:06:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-04 14:06:56,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-04 14:06:56,660 INFO L175 Difference]: Start difference. First operand has 148 places, 149 transitions, 1859 flow. Second operand 10 states and 242 transitions. [2024-06-04 14:06:56,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 205 transitions, 2741 flow [2024-06-04 14:06:56,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 205 transitions, 2570 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 14:06:56,794 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1873 flow [2024-06-04 14:06:56,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1873, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-06-04 14:06:56,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-04 14:06:56,795 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1873 flow [2024-06-04 14:06:56,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:56,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:56,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:56,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:06:56,795 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:56,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1628576386, now seen corresponding path program 3 times [2024-06-04 14:06:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017132264] [2024-06-04 14:06:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:56,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:56,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017132264] [2024-06-04 14:06:56,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017132264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:56,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:56,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:06:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578302785] [2024-06-04 14:06:56,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:56,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:06:56,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:06:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:06:56,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:56,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1873 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:56,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:56,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:56,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:57,431 INFO L124 PetriNetUnfolderBase]: 2760/4832 cut-off events. [2024-06-04 14:06:57,431 INFO L125 PetriNetUnfolderBase]: For 147546/147563 co-relation queries the response was YES. [2024-06-04 14:06:57,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26043 conditions, 4832 events. 2760/4832 cut-off events. For 147546/147563 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33618 event pairs, 1002 based on Foata normal form. 48/4864 useless extension candidates. Maximal degree in co-relation 25968. Up to 2795 conditions per place. [2024-06-04 14:06:57,462 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 115 selfloop transitions, 75 changer transitions 8/204 dead transitions. [2024-06-04 14:06:57,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 204 transitions, 2739 flow [2024-06-04 14:06:57,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:06:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:06:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-04 14:06:57,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 14:06:57,463 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1873 flow. Second operand 9 states and 225 transitions. [2024-06-04 14:06:57,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 204 transitions, 2739 flow [2024-06-04 14:06:57,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 204 transitions, 2561 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-04 14:06:57,610 INFO L231 Difference]: Finished difference. Result has 151 places, 146 transitions, 1757 flow [2024-06-04 14:06:57,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1757, PETRI_PLACES=151, PETRI_TRANSITIONS=146} [2024-06-04 14:06:57,611 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-04 14:06:57,611 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 146 transitions, 1757 flow [2024-06-04 14:06:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:57,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:57,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:57,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:06:57,611 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:57,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1792060004, now seen corresponding path program 3 times [2024-06-04 14:06:57,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:57,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272475103] [2024-06-04 14:06:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:57,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:57,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:57,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272475103] [2024-06-04 14:06:57,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272475103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:57,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:57,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:57,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675710260] [2024-06-04 14:06:57,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:57,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:57,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:57,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:06:57,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 1757 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:57,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:57,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:06:57,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:58,107 INFO L124 PetriNetUnfolderBase]: 2484/4368 cut-off events. [2024-06-04 14:06:58,107 INFO L125 PetriNetUnfolderBase]: For 132422/132422 co-relation queries the response was YES. [2024-06-04 14:06:58,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24357 conditions, 4368 events. 2484/4368 cut-off events. For 132422/132422 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29881 event pairs, 1053 based on Foata normal form. 1/4365 useless extension candidates. Maximal degree in co-relation 24281. Up to 3987 conditions per place. [2024-06-04 14:06:58,137 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 133 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-04 14:06:58,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 162 transitions, 2157 flow [2024-06-04 14:06:58,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-04 14:06:58,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 14:06:58,138 INFO L175 Difference]: Start difference. First operand has 151 places, 146 transitions, 1757 flow. Second operand 6 states and 128 transitions. [2024-06-04 14:06:58,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 162 transitions, 2157 flow [2024-06-04 14:06:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 162 transitions, 1922 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 14:06:58,254 INFO L231 Difference]: Finished difference. Result has 150 places, 151 transitions, 1645 flow [2024-06-04 14:06:58,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1645, PETRI_PLACES=150, PETRI_TRANSITIONS=151} [2024-06-04 14:06:58,255 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-04 14:06:58,255 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 151 transitions, 1645 flow [2024-06-04 14:06:58,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:58,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:58,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:06:58,255 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:58,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2015783543, now seen corresponding path program 1 times [2024-06-04 14:06:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:58,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448871089] [2024-06-04 14:06:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:58,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:58,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:58,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448871089] [2024-06-04 14:06:58,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448871089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:58,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:58,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:58,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824554606] [2024-06-04 14:06:58,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:58,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:58,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:58,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:58,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-04 14:06:58,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 151 transitions, 1645 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:58,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:58,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-04 14:06:58,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:58,871 INFO L124 PetriNetUnfolderBase]: 2333/4144 cut-off events. [2024-06-04 14:06:58,872 INFO L125 PetriNetUnfolderBase]: For 126279/126288 co-relation queries the response was YES. [2024-06-04 14:06:58,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22203 conditions, 4144 events. 2333/4144 cut-off events. For 126279/126288 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28414 event pairs, 926 based on Foata normal form. 17/4137 useless extension candidates. Maximal degree in co-relation 22126. Up to 3620 conditions per place. [2024-06-04 14:06:58,905 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-06-04 14:06:58,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 170 transitions, 2043 flow [2024-06-04 14:06:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 14:06:58,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-04 14:06:58,906 INFO L175 Difference]: Start difference. First operand has 150 places, 151 transitions, 1645 flow. Second operand 6 states and 139 transitions. [2024-06-04 14:06:58,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 170 transitions, 2043 flow [2024-06-04 14:06:59,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 170 transitions, 1979 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 14:06:59,040 INFO L231 Difference]: Finished difference. Result has 153 places, 153 transitions, 1689 flow [2024-06-04 14:06:59,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1689, PETRI_PLACES=153, PETRI_TRANSITIONS=153} [2024-06-04 14:06:59,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-04 14:06:59,041 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 153 transitions, 1689 flow [2024-06-04 14:06:59,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:59,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:59,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:06:59,041 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:59,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash -120741913, now seen corresponding path program 2 times [2024-06-04 14:06:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:59,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527639557] [2024-06-04 14:06:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:59,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:59,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:59,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527639557] [2024-06-04 14:06:59,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527639557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:59,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:59,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:59,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836229505] [2024-06-04 14:06:59,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:59,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:59,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:59,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:59,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-04 14:06:59,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 153 transitions, 1689 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:59,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:59,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-04 14:06:59,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:06:59,607 INFO L124 PetriNetUnfolderBase]: 2373/4201 cut-off events. [2024-06-04 14:06:59,607 INFO L125 PetriNetUnfolderBase]: For 133885/133894 co-relation queries the response was YES. [2024-06-04 14:06:59,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22915 conditions, 4201 events. 2373/4201 cut-off events. For 133885/133894 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28727 event pairs, 978 based on Foata normal form. 17/4190 useless extension candidates. Maximal degree in co-relation 22837. Up to 3702 conditions per place. [2024-06-04 14:06:59,637 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 39 changer transitions 0/171 dead transitions. [2024-06-04 14:06:59,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 2229 flow [2024-06-04 14:06:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:06:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:06:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 14:06:59,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-04 14:06:59,638 INFO L175 Difference]: Start difference. First operand has 153 places, 153 transitions, 1689 flow. Second operand 6 states and 139 transitions. [2024-06-04 14:06:59,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 2229 flow [2024-06-04 14:06:59,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 171 transitions, 2157 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:06:59,776 INFO L231 Difference]: Finished difference. Result has 155 places, 155 transitions, 1744 flow [2024-06-04 14:06:59,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1744, PETRI_PLACES=155, PETRI_TRANSITIONS=155} [2024-06-04 14:06:59,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-04 14:06:59,777 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 155 transitions, 1744 flow [2024-06-04 14:06:59,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:59,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:06:59,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:06:59,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:06:59,778 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:06:59,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:06:59,778 INFO L85 PathProgramCache]: Analyzing trace with hash -107409433, now seen corresponding path program 3 times [2024-06-04 14:06:59,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:06:59,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871886130] [2024-06-04 14:06:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:06:59,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:06:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:06:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:06:59,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:06:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871886130] [2024-06-04 14:06:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871886130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:06:59,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:06:59,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:06:59,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681033126] [2024-06-04 14:06:59,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:06:59,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:06:59,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:06:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:06:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:06:59,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-04 14:06:59,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 155 transitions, 1744 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:06:59,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:06:59,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-04 14:06:59,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:00,345 INFO L124 PetriNetUnfolderBase]: 2438/4302 cut-off events. [2024-06-04 14:07:00,345 INFO L125 PetriNetUnfolderBase]: For 144514/144523 co-relation queries the response was YES. [2024-06-04 14:07:00,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23733 conditions, 4302 events. 2438/4302 cut-off events. For 144514/144523 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29574 event pairs, 944 based on Foata normal form. 17/4291 useless extension candidates. Maximal degree in co-relation 23654. Up to 3605 conditions per place. [2024-06-04 14:07:00,372 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 44 changer transitions 0/179 dead transitions. [2024-06-04 14:07:00,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 179 transitions, 2422 flow [2024-06-04 14:07:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:07:00,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:07:00,373 INFO L175 Difference]: Start difference. First operand has 155 places, 155 transitions, 1744 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:07:00,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 179 transitions, 2422 flow [2024-06-04 14:07:00,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 179 transitions, 2319 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:00,514 INFO L231 Difference]: Finished difference. Result has 157 places, 158 transitions, 1796 flow [2024-06-04 14:07:00,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1796, PETRI_PLACES=157, PETRI_TRANSITIONS=158} [2024-06-04 14:07:00,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-04 14:07:00,514 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 158 transitions, 1796 flow [2024-06-04 14:07:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:00,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:00,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:00,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:07:00,515 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:00,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:00,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1639393537, now seen corresponding path program 1 times [2024-06-04 14:07:00,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:00,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650999243] [2024-06-04 14:07:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:00,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:00,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650999243] [2024-06-04 14:07:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650999243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:00,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:00,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060434003] [2024-06-04 14:07:00,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:00,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:00,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:00,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:00,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 158 transitions, 1796 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:00,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:00,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:01,104 INFO L124 PetriNetUnfolderBase]: 2529/4436 cut-off events. [2024-06-04 14:07:01,104 INFO L125 PetriNetUnfolderBase]: For 148775/148786 co-relation queries the response was YES. [2024-06-04 14:07:01,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24623 conditions, 4436 events. 2529/4436 cut-off events. For 148775/148786 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30189 event pairs, 912 based on Foata normal form. 14/4448 useless extension candidates. Maximal degree in co-relation 24543. Up to 3948 conditions per place. [2024-06-04 14:07:01,138 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 160 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-04 14:07:01,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 189 transitions, 2344 flow [2024-06-04 14:07:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 14:07:01,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-04 14:07:01,139 INFO L175 Difference]: Start difference. First operand has 157 places, 158 transitions, 1796 flow. Second operand 8 states and 174 transitions. [2024-06-04 14:07:01,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 189 transitions, 2344 flow [2024-06-04 14:07:01,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 189 transitions, 2265 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:07:01,279 INFO L231 Difference]: Finished difference. Result has 163 places, 159 transitions, 1776 flow [2024-06-04 14:07:01,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1776, PETRI_PLACES=163, PETRI_TRANSITIONS=159} [2024-06-04 14:07:01,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-04 14:07:01,280 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 159 transitions, 1776 flow [2024-06-04 14:07:01,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:01,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:01,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:01,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:07:01,280 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:01,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1647964417, now seen corresponding path program 2 times [2024-06-04 14:07:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:01,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762151359] [2024-06-04 14:07:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:01,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:01,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:01,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762151359] [2024-06-04 14:07:01,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762151359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:01,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:01,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373883146] [2024-06-04 14:07:01,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:01,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:01,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:01,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:01,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:01,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 159 transitions, 1776 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:01,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:01,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:01,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:01,843 INFO L124 PetriNetUnfolderBase]: 2557/4480 cut-off events. [2024-06-04 14:07:01,843 INFO L125 PetriNetUnfolderBase]: For 156819/156830 co-relation queries the response was YES. [2024-06-04 14:07:01,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24907 conditions, 4480 events. 2557/4480 cut-off events. For 156819/156830 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30622 event pairs, 1006 based on Foata normal form. 16/4494 useless extension candidates. Maximal degree in co-relation 24825. Up to 4068 conditions per place. [2024-06-04 14:07:01,876 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 157 selfloop transitions, 20 changer transitions 0/183 dead transitions. [2024-06-04 14:07:01,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 183 transitions, 2216 flow [2024-06-04 14:07:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 14:07:01,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-04 14:07:01,877 INFO L175 Difference]: Start difference. First operand has 163 places, 159 transitions, 1776 flow. Second operand 8 states and 168 transitions. [2024-06-04 14:07:01,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 183 transitions, 2216 flow [2024-06-04 14:07:02,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 183 transitions, 2177 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:02,073 INFO L231 Difference]: Finished difference. Result has 166 places, 160 transitions, 1795 flow [2024-06-04 14:07:02,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1795, PETRI_PLACES=166, PETRI_TRANSITIONS=160} [2024-06-04 14:07:02,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-04 14:07:02,074 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 160 transitions, 1795 flow [2024-06-04 14:07:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:02,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:02,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:02,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:07:02,074 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:02,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:02,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1642253473, now seen corresponding path program 1 times [2024-06-04 14:07:02,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:02,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894628609] [2024-06-04 14:07:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:02,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:02,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:02,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894628609] [2024-06-04 14:07:02,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894628609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:02,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:02,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:02,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182248855] [2024-06-04 14:07:02,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:02,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:02,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:02,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:02,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:02,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:02,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 160 transitions, 1795 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:02,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:02,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:02,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:02,723 INFO L124 PetriNetUnfolderBase]: 2559/4485 cut-off events. [2024-06-04 14:07:02,723 INFO L125 PetriNetUnfolderBase]: For 158967/158984 co-relation queries the response was YES. [2024-06-04 14:07:02,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25072 conditions, 4485 events. 2559/4485 cut-off events. For 158967/158984 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30645 event pairs, 1017 based on Foata normal form. 14/4495 useless extension candidates. Maximal degree in co-relation 24989. Up to 3965 conditions per place. [2024-06-04 14:07:02,755 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 55 changer transitions 1/196 dead transitions. [2024-06-04 14:07:02,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 196 transitions, 2439 flow [2024-06-04 14:07:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 14:07:02,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-04 14:07:02,756 INFO L175 Difference]: Start difference. First operand has 166 places, 160 transitions, 1795 flow. Second operand 9 states and 207 transitions. [2024-06-04 14:07:02,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 196 transitions, 2439 flow [2024-06-04 14:07:02,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 196 transitions, 2400 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:02,908 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 1893 flow [2024-06-04 14:07:02,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1893, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2024-06-04 14:07:02,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-04 14:07:02,909 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 1893 flow [2024-06-04 14:07:02,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:02,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:02,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:02,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:07:02,910 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:02,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1647967393, now seen corresponding path program 2 times [2024-06-04 14:07:02,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:02,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530092685] [2024-06-04 14:07:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:02,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:02,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:02,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530092685] [2024-06-04 14:07:02,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530092685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:02,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:02,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:02,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526386661] [2024-06-04 14:07:02,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:02,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:02,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:03,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:03,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 1893 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:03,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:03,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:03,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:03,467 INFO L124 PetriNetUnfolderBase]: 2578/4516 cut-off events. [2024-06-04 14:07:03,468 INFO L125 PetriNetUnfolderBase]: For 168031/168048 co-relation queries the response was YES. [2024-06-04 14:07:03,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25699 conditions, 4516 events. 2578/4516 cut-off events. For 168031/168048 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30846 event pairs, 1017 based on Foata normal form. 13/4525 useless extension candidates. Maximal degree in co-relation 25615. Up to 3984 conditions per place. [2024-06-04 14:07:03,498 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 61 changer transitions 1/195 dead transitions. [2024-06-04 14:07:03,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 195 transitions, 2593 flow [2024-06-04 14:07:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 14:07:03,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-04 14:07:03,499 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 1893 flow. Second operand 8 states and 183 transitions. [2024-06-04 14:07:03,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 195 transitions, 2593 flow [2024-06-04 14:07:03,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 195 transitions, 2487 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:03,670 INFO L231 Difference]: Finished difference. Result has 172 places, 168 transitions, 2022 flow [2024-06-04 14:07:03,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2022, PETRI_PLACES=172, PETRI_TRANSITIONS=168} [2024-06-04 14:07:03,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-04 14:07:03,670 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 168 transitions, 2022 flow [2024-06-04 14:07:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:03,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:03,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:03,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:07:03,671 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:03,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1934851747, now seen corresponding path program 3 times [2024-06-04 14:07:03,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:03,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514448968] [2024-06-04 14:07:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:03,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:03,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514448968] [2024-06-04 14:07:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514448968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:03,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:03,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082453840] [2024-06-04 14:07:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:03,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:03,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:03,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 168 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:03,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:03,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:03,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:04,281 INFO L124 PetriNetUnfolderBase]: 2558/4483 cut-off events. [2024-06-04 14:07:04,281 INFO L125 PetriNetUnfolderBase]: For 174896/174896 co-relation queries the response was YES. [2024-06-04 14:07:04,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25489 conditions, 4483 events. 2558/4483 cut-off events. For 174896/174896 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30543 event pairs, 1005 based on Foata normal form. 8/4487 useless extension candidates. Maximal degree in co-relation 25403. Up to 4070 conditions per place. [2024-06-04 14:07:04,311 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 158 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-04 14:07:04,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2431 flow [2024-06-04 14:07:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-04 14:07:04,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 14:07:04,312 INFO L175 Difference]: Start difference. First operand has 172 places, 168 transitions, 2022 flow. Second operand 6 states and 130 transitions. [2024-06-04 14:07:04,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2431 flow [2024-06-04 14:07:04,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 183 transitions, 2346 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:04,477 INFO L231 Difference]: Finished difference. Result has 174 places, 168 transitions, 1980 flow [2024-06-04 14:07:04,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1980, PETRI_PLACES=174, PETRI_TRANSITIONS=168} [2024-06-04 14:07:04,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-04 14:07:04,477 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 168 transitions, 1980 flow [2024-06-04 14:07:04,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:04,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:04,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:04,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:07:04,478 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:04,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1757544643, now seen corresponding path program 3 times [2024-06-04 14:07:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:04,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334993110] [2024-06-04 14:07:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:04,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:04,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334993110] [2024-06-04 14:07:04,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334993110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:04,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:04,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:04,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394773640] [2024-06-04 14:07:04,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:04,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:04,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:04,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:04,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:04,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 168 transitions, 1980 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:04,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:04,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:04,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:05,115 INFO L124 PetriNetUnfolderBase]: 2552/4480 cut-off events. [2024-06-04 14:07:05,115 INFO L125 PetriNetUnfolderBase]: For 175252/175269 co-relation queries the response was YES. [2024-06-04 14:07:05,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25409 conditions, 4480 events. 2552/4480 cut-off events. For 175252/175269 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30609 event pairs, 1009 based on Foata normal form. 14/4490 useless extension candidates. Maximal degree in co-relation 25322. Up to 3988 conditions per place. [2024-06-04 14:07:05,150 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 134 selfloop transitions, 47 changer transitions 1/188 dead transitions. [2024-06-04 14:07:05,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 2478 flow [2024-06-04 14:07:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:07:05,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:07:05,151 INFO L175 Difference]: Start difference. First operand has 174 places, 168 transitions, 1980 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:07:05,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 2478 flow [2024-06-04 14:07:05,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 188 transitions, 2426 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:05,354 INFO L231 Difference]: Finished difference. Result has 175 places, 167 transitions, 2022 flow [2024-06-04 14:07:05,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2022, PETRI_PLACES=175, PETRI_TRANSITIONS=167} [2024-06-04 14:07:05,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-04 14:07:05,354 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 167 transitions, 2022 flow [2024-06-04 14:07:05,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:05,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:05,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:05,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:07:05,355 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:05,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1786291941, now seen corresponding path program 4 times [2024-06-04 14:07:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:05,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196001146] [2024-06-04 14:07:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:05,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196001146] [2024-06-04 14:07:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196001146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:05,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:05,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498562971] [2024-06-04 14:07:05,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:05,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:05,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 167 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:05,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:05,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:05,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:06,022 INFO L124 PetriNetUnfolderBase]: 2517/4415 cut-off events. [2024-06-04 14:07:06,022 INFO L125 PetriNetUnfolderBase]: For 180913/180930 co-relation queries the response was YES. [2024-06-04 14:07:06,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25262 conditions, 4415 events. 2517/4415 cut-off events. For 180913/180930 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30017 event pairs, 991 based on Foata normal form. 14/4425 useless extension candidates. Maximal degree in co-relation 25174. Up to 3929 conditions per place. [2024-06-04 14:07:06,052 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 48 changer transitions 2/188 dead transitions. [2024-06-04 14:07:06,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 188 transitions, 2438 flow [2024-06-04 14:07:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-04 14:07:06,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-04 14:07:06,053 INFO L175 Difference]: Start difference. First operand has 175 places, 167 transitions, 2022 flow. Second operand 8 states and 178 transitions. [2024-06-04 14:07:06,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 188 transitions, 2438 flow [2024-06-04 14:07:06,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 188 transitions, 2352 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:06,257 INFO L231 Difference]: Finished difference. Result has 178 places, 165 transitions, 2013 flow [2024-06-04 14:07:06,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2013, PETRI_PLACES=178, PETRI_TRANSITIONS=165} [2024-06-04 14:07:06,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-04 14:07:06,257 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 165 transitions, 2013 flow [2024-06-04 14:07:06,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:06,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:06,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:06,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:07:06,258 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:06,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1934854723, now seen corresponding path program 5 times [2024-06-04 14:07:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:06,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449451291] [2024-06-04 14:07:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:06,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:06,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449451291] [2024-06-04 14:07:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449451291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:06,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:06,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268068366] [2024-06-04 14:07:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:06,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:06,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:06,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 165 transitions, 2013 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:06,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:06,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:06,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:06,805 INFO L124 PetriNetUnfolderBase]: 2404/4215 cut-off events. [2024-06-04 14:07:06,805 INFO L125 PetriNetUnfolderBase]: For 178780/178786 co-relation queries the response was YES. [2024-06-04 14:07:06,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24486 conditions, 4215 events. 2404/4215 cut-off events. For 178780/178786 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28408 event pairs, 952 based on Foata normal form. 5/4213 useless extension candidates. Maximal degree in co-relation 24398. Up to 3704 conditions per place. [2024-06-04 14:07:06,836 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 57 changer transitions 2/179 dead transitions. [2024-06-04 14:07:06,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 179 transitions, 2393 flow [2024-06-04 14:07:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-04 14:07:06,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-04 14:07:06,837 INFO L175 Difference]: Start difference. First operand has 178 places, 165 transitions, 2013 flow. Second operand 7 states and 154 transitions. [2024-06-04 14:07:06,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 179 transitions, 2393 flow [2024-06-04 14:07:07,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 179 transitions, 2212 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:07,043 INFO L231 Difference]: Finished difference. Result has 174 places, 163 transitions, 1929 flow [2024-06-04 14:07:07,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1929, PETRI_PLACES=174, PETRI_TRANSITIONS=163} [2024-06-04 14:07:07,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-04 14:07:07,044 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 163 transitions, 1929 flow [2024-06-04 14:07:07,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:07,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:07,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:07,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:07:07,045 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:07,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1935220709, now seen corresponding path program 1 times [2024-06-04 14:07:07,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:07,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604456978] [2024-06-04 14:07:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:07,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:07,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604456978] [2024-06-04 14:07:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604456978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:07,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447092042] [2024-06-04 14:07:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:07,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:07,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 163 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:07,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:07,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:07,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:07,643 INFO L124 PetriNetUnfolderBase]: 2341/4105 cut-off events. [2024-06-04 14:07:07,644 INFO L125 PetriNetUnfolderBase]: For 182459/182459 co-relation queries the response was YES. [2024-06-04 14:07:07,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24071 conditions, 4105 events. 2341/4105 cut-off events. For 182459/182459 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27508 event pairs, 879 based on Foata normal form. 6/4107 useless extension candidates. Maximal degree in co-relation 23984. Up to 3630 conditions per place. [2024-06-04 14:07:07,669 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 156 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-06-04 14:07:07,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 185 transitions, 2407 flow [2024-06-04 14:07:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-04 14:07:07,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-04 14:07:07,670 INFO L175 Difference]: Start difference. First operand has 174 places, 163 transitions, 1929 flow. Second operand 6 states and 133 transitions. [2024-06-04 14:07:07,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 185 transitions, 2407 flow [2024-06-04 14:07:07,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 185 transitions, 2254 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:07,876 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 1894 flow [2024-06-04 14:07:07,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1894, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-06-04 14:07:07,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-04 14:07:07,877 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 1894 flow [2024-06-04 14:07:07,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:07,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:07,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:07,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:07:07,877 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:07,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash 551600133, now seen corresponding path program 4 times [2024-06-04 14:07:07,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:07,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539317834] [2024-06-04 14:07:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:07,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:07,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:07,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539317834] [2024-06-04 14:07:07,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539317834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:07,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:07,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470257595] [2024-06-04 14:07:07,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:07,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:07,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:07,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:08,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:08,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 1894 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:08,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:08,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:08,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:08,452 INFO L124 PetriNetUnfolderBase]: 2356/4134 cut-off events. [2024-06-04 14:07:08,452 INFO L125 PetriNetUnfolderBase]: For 190748/190748 co-relation queries the response was YES. [2024-06-04 14:07:08,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24326 conditions, 4134 events. 2356/4134 cut-off events. For 190748/190748 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27726 event pairs, 904 based on Foata normal form. 8/4138 useless extension candidates. Maximal degree in co-relation 24237. Up to 3717 conditions per place. [2024-06-04 14:07:08,482 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 154 selfloop transitions, 24 changer transitions 0/184 dead transitions. [2024-06-04 14:07:08,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 184 transitions, 2325 flow [2024-06-04 14:07:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-04 14:07:08,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-04 14:07:08,483 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 1894 flow. Second operand 7 states and 147 transitions. [2024-06-04 14:07:08,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 184 transitions, 2325 flow [2024-06-04 14:07:08,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 184 transitions, 2268 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:08,721 INFO L231 Difference]: Finished difference. Result has 177 places, 168 transitions, 1910 flow [2024-06-04 14:07:08,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1910, PETRI_PLACES=177, PETRI_TRANSITIONS=168} [2024-06-04 14:07:08,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-04 14:07:08,721 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 168 transitions, 1910 flow [2024-06-04 14:07:08,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:08,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:08,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:08,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:07:08,722 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:08,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1332600505, now seen corresponding path program 1 times [2024-06-04 14:07:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:08,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006374875] [2024-06-04 14:07:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:08,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:08,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006374875] [2024-06-04 14:07:08,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006374875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:08,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:08,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:08,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928019404] [2024-06-04 14:07:08,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:08,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:08,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:08,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:08,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 168 transitions, 1910 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:08,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:08,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:08,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:09,275 INFO L124 PetriNetUnfolderBase]: 2353/4131 cut-off events. [2024-06-04 14:07:09,275 INFO L125 PetriNetUnfolderBase]: For 190163/190180 co-relation queries the response was YES. [2024-06-04 14:07:09,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24339 conditions, 4131 events. 2353/4131 cut-off events. For 190163/190180 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27782 event pairs, 908 based on Foata normal form. 13/4135 useless extension candidates. Maximal degree in co-relation 24249. Up to 3688 conditions per place. [2024-06-04 14:07:09,305 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 145 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-04 14:07:09,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 185 transitions, 2400 flow [2024-06-04 14:07:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 14:07:09,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-04 14:07:09,306 INFO L175 Difference]: Start difference. First operand has 177 places, 168 transitions, 1910 flow. Second operand 6 states and 137 transitions. [2024-06-04 14:07:09,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 185 transitions, 2400 flow [2024-06-04 14:07:09,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 185 transitions, 2335 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:09,593 INFO L231 Difference]: Finished difference. Result has 178 places, 168 transitions, 1919 flow [2024-06-04 14:07:09,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1919, PETRI_PLACES=178, PETRI_TRANSITIONS=168} [2024-06-04 14:07:09,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-04 14:07:09,593 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 168 transitions, 1919 flow [2024-06-04 14:07:09,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:09,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:09,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:09,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:07:09,594 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:09,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1798518301, now seen corresponding path program 2 times [2024-06-04 14:07:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:09,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345773803] [2024-06-04 14:07:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:09,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:09,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:09,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345773803] [2024-06-04 14:07:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345773803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:09,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:09,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:09,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185943255] [2024-06-04 14:07:09,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:09,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:09,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:09,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:09,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:09,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:09,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 168 transitions, 1919 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:09,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:09,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:09,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:10,258 INFO L124 PetriNetUnfolderBase]: 2350/4130 cut-off events. [2024-06-04 14:07:10,259 INFO L125 PetriNetUnfolderBase]: For 196386/196397 co-relation queries the response was YES. [2024-06-04 14:07:10,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24361 conditions, 4130 events. 2350/4130 cut-off events. For 196386/196397 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27765 event pairs, 918 based on Foata normal form. 9/4133 useless extension candidates. Maximal degree in co-relation 24270. Up to 3685 conditions per place. [2024-06-04 14:07:10,294 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 37 changer transitions 0/178 dead transitions. [2024-06-04 14:07:10,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 178 transitions, 2287 flow [2024-06-04 14:07:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-04 14:07:10,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-06-04 14:07:10,295 INFO L175 Difference]: Start difference. First operand has 178 places, 168 transitions, 1919 flow. Second operand 6 states and 131 transitions. [2024-06-04 14:07:10,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 178 transitions, 2287 flow [2024-06-04 14:07:10,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 178 transitions, 2191 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:10,619 INFO L231 Difference]: Finished difference. Result has 179 places, 168 transitions, 1903 flow [2024-06-04 14:07:10,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1903, PETRI_PLACES=179, PETRI_TRANSITIONS=168} [2024-06-04 14:07:10,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-04 14:07:10,620 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 168 transitions, 1903 flow [2024-06-04 14:07:10,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:10,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:10,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:07:10,620 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:10,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1291642587, now seen corresponding path program 6 times [2024-06-04 14:07:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:10,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202292626] [2024-06-04 14:07:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:10,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:10,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202292626] [2024-06-04 14:07:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202292626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:10,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:10,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527928344] [2024-06-04 14:07:10,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:10,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:10,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:10,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 168 transitions, 1903 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:10,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:10,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:11,188 INFO L124 PetriNetUnfolderBase]: 2352/4134 cut-off events. [2024-06-04 14:07:11,188 INFO L125 PetriNetUnfolderBase]: For 204158/204169 co-relation queries the response was YES. [2024-06-04 14:07:11,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24485 conditions, 4134 events. 2352/4134 cut-off events. For 204158/204169 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27792 event pairs, 917 based on Foata normal form. 10/4138 useless extension candidates. Maximal degree in co-relation 24393. Up to 3596 conditions per place. [2024-06-04 14:07:11,219 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 76 changer transitions 0/191 dead transitions. [2024-06-04 14:07:11,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 191 transitions, 2538 flow [2024-06-04 14:07:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 14:07:11,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:07:11,220 INFO L175 Difference]: Start difference. First operand has 179 places, 168 transitions, 1903 flow. Second operand 8 states and 180 transitions. [2024-06-04 14:07:11,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 191 transitions, 2538 flow [2024-06-04 14:07:11,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 191 transitions, 2429 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:11,492 INFO L231 Difference]: Finished difference. Result has 181 places, 171 transitions, 1986 flow [2024-06-04 14:07:11,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1794, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=181, PETRI_TRANSITIONS=171} [2024-06-04 14:07:11,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-04 14:07:11,492 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 171 transitions, 1986 flow [2024-06-04 14:07:11,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:11,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:11,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:07:11,493 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:11,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash 551603109, now seen corresponding path program 7 times [2024-06-04 14:07:11,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:11,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576039474] [2024-06-04 14:07:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:11,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:11,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:11,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:11,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576039474] [2024-06-04 14:07:11,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576039474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:11,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:11,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:11,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060371807] [2024-06-04 14:07:11,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:11,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:11,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:11,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:11,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:11,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:11,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 171 transitions, 1986 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:11,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:11,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:11,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:12,088 INFO L124 PetriNetUnfolderBase]: 2349/4127 cut-off events. [2024-06-04 14:07:12,088 INFO L125 PetriNetUnfolderBase]: For 210442/210442 co-relation queries the response was YES. [2024-06-04 14:07:12,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24638 conditions, 4127 events. 2349/4127 cut-off events. For 210442/210442 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27764 event pairs, 949 based on Foata normal form. 1/4119 useless extension candidates. Maximal degree in co-relation 24546. Up to 3555 conditions per place. [2024-06-04 14:07:12,113 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 83 changer transitions 0/190 dead transitions. [2024-06-04 14:07:12,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 190 transitions, 2654 flow [2024-06-04 14:07:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 14:07:12,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 14:07:12,114 INFO L175 Difference]: Start difference. First operand has 181 places, 171 transitions, 1986 flow. Second operand 7 states and 155 transitions. [2024-06-04 14:07:12,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 190 transitions, 2654 flow [2024-06-04 14:07:12,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 190 transitions, 2458 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:12,407 INFO L231 Difference]: Finished difference. Result has 182 places, 177 transitions, 2088 flow [2024-06-04 14:07:12,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2088, PETRI_PLACES=182, PETRI_TRANSITIONS=177} [2024-06-04 14:07:12,408 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-04 14:07:12,408 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 177 transitions, 2088 flow [2024-06-04 14:07:12,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:12,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:12,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:12,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:07:12,409 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:12,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash 551969095, now seen corresponding path program 2 times [2024-06-04 14:07:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399693002] [2024-06-04 14:07:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:12,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:12,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399693002] [2024-06-04 14:07:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399693002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:12,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:12,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:12,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232180070] [2024-06-04 14:07:12,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:12,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:12,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 177 transitions, 2088 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:12,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:12,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:12,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:12,948 INFO L124 PetriNetUnfolderBase]: 2369/4163 cut-off events. [2024-06-04 14:07:12,948 INFO L125 PetriNetUnfolderBase]: For 227827/227827 co-relation queries the response was YES. [2024-06-04 14:07:12,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25802 conditions, 4163 events. 2369/4163 cut-off events. For 227827/227827 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27967 event pairs, 897 based on Foata normal form. 6/4165 useless extension candidates. Maximal degree in co-relation 25709. Up to 3710 conditions per place. [2024-06-04 14:07:12,980 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 26 changer transitions 0/199 dead transitions. [2024-06-04 14:07:12,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 199 transitions, 2595 flow [2024-06-04 14:07:12,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:12,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-04 14:07:12,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 14:07:12,981 INFO L175 Difference]: Start difference. First operand has 182 places, 177 transitions, 2088 flow. Second operand 7 states and 150 transitions. [2024-06-04 14:07:12,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 199 transitions, 2595 flow [2024-06-04 14:07:13,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 199 transitions, 2492 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:13,292 INFO L231 Difference]: Finished difference. Result has 187 places, 180 transitions, 2095 flow [2024-06-04 14:07:13,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2095, PETRI_PLACES=187, PETRI_TRANSITIONS=180} [2024-06-04 14:07:13,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-04 14:07:13,292 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 180 transitions, 2095 flow [2024-06-04 14:07:13,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:13,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:13,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:13,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:07:13,293 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:13,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:13,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2116957477, now seen corresponding path program 3 times [2024-06-04 14:07:13,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:13,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99157871] [2024-06-04 14:07:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:13,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99157871] [2024-06-04 14:07:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99157871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:13,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344741094] [2024-06-04 14:07:13,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:13,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:13,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:13,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:13,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 180 transitions, 2095 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:13,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:13,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:13,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:13,853 INFO L124 PetriNetUnfolderBase]: 2356/4144 cut-off events. [2024-06-04 14:07:13,853 INFO L125 PetriNetUnfolderBase]: For 229273/229273 co-relation queries the response was YES. [2024-06-04 14:07:13,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25666 conditions, 4144 events. 2356/4144 cut-off events. For 229273/229273 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27887 event pairs, 876 based on Foata normal form. 6/4146 useless extension candidates. Maximal degree in co-relation 25569. Up to 3559 conditions per place. [2024-06-04 14:07:13,885 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 164 selfloop transitions, 32 changer transitions 0/202 dead transitions. [2024-06-04 14:07:13,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 202 transitions, 2593 flow [2024-06-04 14:07:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:13,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-04 14:07:13,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 14:07:13,886 INFO L175 Difference]: Start difference. First operand has 187 places, 180 transitions, 2095 flow. Second operand 7 states and 150 transitions. [2024-06-04 14:07:13,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 202 transitions, 2593 flow [2024-06-04 14:07:14,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 202 transitions, 2537 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:14,185 INFO L231 Difference]: Finished difference. Result has 192 places, 182 transitions, 2139 flow [2024-06-04 14:07:14,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2139, PETRI_PLACES=192, PETRI_TRANSITIONS=182} [2024-06-04 14:07:14,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-04 14:07:14,186 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 182 transitions, 2139 flow [2024-06-04 14:07:14,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:14,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:14,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:14,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:07:14,186 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:14,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2108713443, now seen corresponding path program 1 times [2024-06-04 14:07:14,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:14,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269178221] [2024-06-04 14:07:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:14,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:14,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269178221] [2024-06-04 14:07:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269178221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:14,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:14,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:07:14,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100139855] [2024-06-04 14:07:14,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:14,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:07:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:07:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:07:14,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:14,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 182 transitions, 2139 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:14,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:14,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:14,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:14,774 INFO L124 PetriNetUnfolderBase]: 2363/4155 cut-off events. [2024-06-04 14:07:14,774 INFO L125 PetriNetUnfolderBase]: For 235092/235092 co-relation queries the response was YES. [2024-06-04 14:07:14,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25837 conditions, 4155 events. 2363/4155 cut-off events. For 235092/235092 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28029 event pairs, 844 based on Foata normal form. 6/4154 useless extension candidates. Maximal degree in co-relation 25737. Up to 3658 conditions per place. [2024-06-04 14:07:14,805 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 185 selfloop transitions, 15 changer transitions 0/206 dead transitions. [2024-06-04 14:07:14,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 206 transitions, 2752 flow [2024-06-04 14:07:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:07:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:07:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-04 14:07:14,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-04 14:07:14,806 INFO L175 Difference]: Start difference. First operand has 192 places, 182 transitions, 2139 flow. Second operand 5 states and 119 transitions. [2024-06-04 14:07:14,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 206 transitions, 2752 flow [2024-06-04 14:07:15,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 206 transitions, 2589 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:15,147 INFO L231 Difference]: Finished difference. Result has 190 places, 183 transitions, 2029 flow [2024-06-04 14:07:15,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2029, PETRI_PLACES=190, PETRI_TRANSITIONS=183} [2024-06-04 14:07:15,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-04 14:07:15,148 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 183 transitions, 2029 flow [2024-06-04 14:07:15,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:15,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:15,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:15,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:07:15,148 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:15,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1811551905, now seen corresponding path program 1 times [2024-06-04 14:07:15,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:15,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518749054] [2024-06-04 14:07:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:15,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:15,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:15,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518749054] [2024-06-04 14:07:15,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518749054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:15,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:15,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:07:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803924919] [2024-06-04 14:07:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:15,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:07:15,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:07:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:07:15,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:15,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 183 transitions, 2029 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:15,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:15,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:15,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:15,702 INFO L124 PetriNetUnfolderBase]: 2350/4136 cut-off events. [2024-06-04 14:07:15,702 INFO L125 PetriNetUnfolderBase]: For 234682/234682 co-relation queries the response was YES. [2024-06-04 14:07:15,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25198 conditions, 4136 events. 2350/4136 cut-off events. For 234682/234682 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27909 event pairs, 837 based on Foata normal form. 6/4135 useless extension candidates. Maximal degree in co-relation 25100. Up to 3652 conditions per place. [2024-06-04 14:07:15,734 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 184 selfloop transitions, 15 changer transitions 0/205 dead transitions. [2024-06-04 14:07:15,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 205 transitions, 2517 flow [2024-06-04 14:07:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:07:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:07:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 14:07:15,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-04 14:07:15,735 INFO L175 Difference]: Start difference. First operand has 190 places, 183 transitions, 2029 flow. Second operand 5 states and 118 transitions. [2024-06-04 14:07:15,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 205 transitions, 2517 flow [2024-06-04 14:07:16,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 205 transitions, 2490 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 14:07:16,099 INFO L231 Difference]: Finished difference. Result has 193 places, 183 transitions, 2036 flow [2024-06-04 14:07:16,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2036, PETRI_PLACES=193, PETRI_TRANSITIONS=183} [2024-06-04 14:07:16,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-04 14:07:16,099 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 183 transitions, 2036 flow [2024-06-04 14:07:16,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:16,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:16,099 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] [2024-06-04 14:07:16,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:07:16,099 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:16,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:16,100 INFO L85 PathProgramCache]: Analyzing trace with hash -842652273, now seen corresponding path program 1 times [2024-06-04 14:07:16,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:16,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079085413] [2024-06-04 14:07:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:16,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:16,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079085413] [2024-06-04 14:07:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079085413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:16,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:16,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:16,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721874075] [2024-06-04 14:07:16,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:16,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:16,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:16,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:16,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:16,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 183 transitions, 2036 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:16,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:16,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:16,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:16,712 INFO L124 PetriNetUnfolderBase]: 2355/4147 cut-off events. [2024-06-04 14:07:16,712 INFO L125 PetriNetUnfolderBase]: For 228285/228302 co-relation queries the response was YES. [2024-06-04 14:07:16,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25248 conditions, 4147 events. 2355/4147 cut-off events. For 228285/228302 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27965 event pairs, 907 based on Foata normal form. 13/4151 useless extension candidates. Maximal degree in co-relation 25149. Up to 3605 conditions per place. [2024-06-04 14:07:16,745 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 140 selfloop transitions, 75 changer transitions 0/221 dead transitions. [2024-06-04 14:07:16,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 221 transitions, 2790 flow [2024-06-04 14:07:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-04 14:07:16,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-04 14:07:16,746 INFO L175 Difference]: Start difference. First operand has 193 places, 183 transitions, 2036 flow. Second operand 11 states and 239 transitions. [2024-06-04 14:07:16,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 221 transitions, 2790 flow [2024-06-04 14:07:17,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 221 transitions, 2749 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:17,004 INFO L231 Difference]: Finished difference. Result has 200 places, 186 transitions, 2181 flow [2024-06-04 14:07:17,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2181, PETRI_PLACES=200, PETRI_TRANSITIONS=186} [2024-06-04 14:07:17,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-04 14:07:17,004 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 186 transitions, 2181 flow [2024-06-04 14:07:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:17,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:17,005 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] [2024-06-04 14:07:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:07:17,005 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:17,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:17,005 INFO L85 PathProgramCache]: Analyzing trace with hash 197109937, now seen corresponding path program 2 times [2024-06-04 14:07:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:17,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722222093] [2024-06-04 14:07:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:17,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:17,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722222093] [2024-06-04 14:07:17,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722222093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:17,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:17,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:17,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808745999] [2024-06-04 14:07:17,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:17,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:17,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:17,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:17,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 186 transitions, 2181 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:17,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:17,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:17,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:17,638 INFO L124 PetriNetUnfolderBase]: 2352/4143 cut-off events. [2024-06-04 14:07:17,638 INFO L125 PetriNetUnfolderBase]: For 235155/235172 co-relation queries the response was YES. [2024-06-04 14:07:17,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25441 conditions, 4143 events. 2352/4143 cut-off events. For 235155/235172 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27911 event pairs, 907 based on Foata normal form. 13/4147 useless extension candidates. Maximal degree in co-relation 25341. Up to 3602 conditions per place. [2024-06-04 14:07:17,668 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-04 14:07:17,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 220 transitions, 2799 flow [2024-06-04 14:07:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-04 14:07:17,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-04 14:07:17,669 INFO L175 Difference]: Start difference. First operand has 200 places, 186 transitions, 2181 flow. Second operand 11 states and 238 transitions. [2024-06-04 14:07:17,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 220 transitions, 2799 flow [2024-06-04 14:07:18,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 220 transitions, 2603 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:18,008 INFO L231 Difference]: Finished difference. Result has 202 places, 186 transitions, 2143 flow [2024-06-04 14:07:18,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2143, PETRI_PLACES=202, PETRI_TRANSITIONS=186} [2024-06-04 14:07:18,009 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-04 14:07:18,009 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 186 transitions, 2143 flow [2024-06-04 14:07:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:18,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:18,009 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] [2024-06-04 14:07:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:07:18,009 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:18,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash -336885053, now seen corresponding path program 3 times [2024-06-04 14:07:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:18,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049539799] [2024-06-04 14:07:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:18,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049539799] [2024-06-04 14:07:18,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049539799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:18,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:18,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:18,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869878769] [2024-06-04 14:07:18,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:18,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:18,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:18,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:18,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:18,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 186 transitions, 2143 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:18,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:18,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:18,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:18,654 INFO L124 PetriNetUnfolderBase]: 2357/4156 cut-off events. [2024-06-04 14:07:18,655 INFO L125 PetriNetUnfolderBase]: For 235163/235174 co-relation queries the response was YES. [2024-06-04 14:07:18,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25462 conditions, 4156 events. 2357/4156 cut-off events. For 235163/235174 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28064 event pairs, 910 based on Foata normal form. 9/4159 useless extension candidates. Maximal degree in co-relation 25361. Up to 3608 conditions per place. [2024-06-04 14:07:18,687 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 123 selfloop transitions, 82 changer transitions 0/211 dead transitions. [2024-06-04 14:07:18,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 211 transitions, 2746 flow [2024-06-04 14:07:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-04 14:07:18,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-04 14:07:18,688 INFO L175 Difference]: Start difference. First operand has 202 places, 186 transitions, 2143 flow. Second operand 11 states and 228 transitions. [2024-06-04 14:07:18,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 211 transitions, 2746 flow [2024-06-04 14:07:19,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 211 transitions, 2586 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:19,036 INFO L231 Difference]: Finished difference. Result has 203 places, 189 transitions, 2190 flow [2024-06-04 14:07:19,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2190, PETRI_PLACES=203, PETRI_TRANSITIONS=189} [2024-06-04 14:07:19,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-04 14:07:19,036 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 189 transitions, 2190 flow [2024-06-04 14:07:19,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:19,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:19,037 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] [2024-06-04 14:07:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:07:19,037 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:19,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash -176919699, now seen corresponding path program 4 times [2024-06-04 14:07:19,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:19,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834008306] [2024-06-04 14:07:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834008306] [2024-06-04 14:07:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834008306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:19,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:19,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477601598] [2024-06-04 14:07:19,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:19,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:19,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 189 transitions, 2190 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:19,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:19,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:19,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:19,687 INFO L124 PetriNetUnfolderBase]: 2354/4152 cut-off events. [2024-06-04 14:07:19,687 INFO L125 PetriNetUnfolderBase]: For 233800/233811 co-relation queries the response was YES. [2024-06-04 14:07:19,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25390 conditions, 4152 events. 2354/4152 cut-off events. For 233800/233811 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27997 event pairs, 910 based on Foata normal form. 9/4155 useless extension candidates. Maximal degree in co-relation 25288. Up to 3605 conditions per place. [2024-06-04 14:07:19,717 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 82 changer transitions 0/210 dead transitions. [2024-06-04 14:07:19,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 210 transitions, 2648 flow [2024-06-04 14:07:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-04 14:07:19,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-04 14:07:19,719 INFO L175 Difference]: Start difference. First operand has 203 places, 189 transitions, 2190 flow. Second operand 11 states and 227 transitions. [2024-06-04 14:07:19,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 210 transitions, 2648 flow [2024-06-04 14:07:20,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 210 transitions, 2460 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:20,088 INFO L231 Difference]: Finished difference. Result has 205 places, 189 transitions, 2172 flow [2024-06-04 14:07:20,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2172, PETRI_PLACES=205, PETRI_TRANSITIONS=189} [2024-06-04 14:07:20,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-04 14:07:20,089 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 189 transitions, 2172 flow [2024-06-04 14:07:20,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:20,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:20,089 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] [2024-06-04 14:07:20,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:07:20,089 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:20,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1140128017, now seen corresponding path program 5 times [2024-06-04 14:07:20,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:20,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862592550] [2024-06-04 14:07:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:20,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862592550] [2024-06-04 14:07:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862592550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:20,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:20,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715699651] [2024-06-04 14:07:20,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:20,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:20,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:20,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:20,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 189 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:20,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:20,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:20,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:20,674 INFO L124 PetriNetUnfolderBase]: 2351/4146 cut-off events. [2024-06-04 14:07:20,674 INFO L125 PetriNetUnfolderBase]: For 240526/240526 co-relation queries the response was YES. [2024-06-04 14:07:20,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25442 conditions, 4146 events. 2351/4146 cut-off events. For 240526/240526 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27936 event pairs, 941 based on Foata normal form. 1/4138 useless extension candidates. Maximal degree in co-relation 25339. Up to 3565 conditions per place. [2024-06-04 14:07:20,707 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 107 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-06-04 14:07:20,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 203 transitions, 2598 flow [2024-06-04 14:07:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-04 14:07:20,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-04 14:07:20,708 INFO L175 Difference]: Start difference. First operand has 205 places, 189 transitions, 2172 flow. Second operand 10 states and 203 transitions. [2024-06-04 14:07:20,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 203 transitions, 2598 flow [2024-06-04 14:07:21,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 203 transitions, 2434 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:21,005 INFO L231 Difference]: Finished difference. Result has 205 places, 189 transitions, 2194 flow [2024-06-04 14:07:21,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2194, PETRI_PLACES=205, PETRI_TRANSITIONS=189} [2024-06-04 14:07:21,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-04 14:07:21,006 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 189 transitions, 2194 flow [2024-06-04 14:07:21,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:21,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:21,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:21,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:07:21,006 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:21,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1316776580, now seen corresponding path program 1 times [2024-06-04 14:07:21,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:21,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029928193] [2024-06-04 14:07:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:21,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:21,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029928193] [2024-06-04 14:07:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029928193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:21,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:21,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:21,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226790865] [2024-06-04 14:07:21,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:21,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:21,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:21,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:21,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 189 transitions, 2194 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:21,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:21,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:21,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:21,652 INFO L124 PetriNetUnfolderBase]: 2338/4122 cut-off events. [2024-06-04 14:07:21,653 INFO L125 PetriNetUnfolderBase]: For 256251/256268 co-relation queries the response was YES. [2024-06-04 14:07:21,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24609 conditions, 4122 events. 2338/4122 cut-off events. For 256251/256268 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27621 event pairs, 731 based on Foata normal form. 36/4154 useless extension candidates. Maximal degree in co-relation 24505. Up to 1560 conditions per place. [2024-06-04 14:07:21,684 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 57 changer transitions 14/240 dead transitions. [2024-06-04 14:07:21,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 240 transitions, 3092 flow [2024-06-04 14:07:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 14:07:21,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-04 14:07:21,685 INFO L175 Difference]: Start difference. First operand has 205 places, 189 transitions, 2194 flow. Second operand 9 states and 217 transitions. [2024-06-04 14:07:21,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 240 transitions, 3092 flow [2024-06-04 14:07:22,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 240 transitions, 2849 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:22,035 INFO L231 Difference]: Finished difference. Result has 205 places, 185 transitions, 2032 flow [2024-06-04 14:07:22,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2032, PETRI_PLACES=205, PETRI_TRANSITIONS=185} [2024-06-04 14:07:22,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-04 14:07:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 185 transitions, 2032 flow [2024-06-04 14:07:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:22,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:22,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:22,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:07:22,036 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:22,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1830701348, now seen corresponding path program 2 times [2024-06-04 14:07:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70684101] [2024-06-04 14:07:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:22,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:22,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70684101] [2024-06-04 14:07:22,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70684101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:22,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:22,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:22,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233674744] [2024-06-04 14:07:22,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:22,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:22,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:22,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 185 transitions, 2032 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:22,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:22,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:22,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:22,821 INFO L124 PetriNetUnfolderBase]: 2516/4354 cut-off events. [2024-06-04 14:07:22,821 INFO L125 PetriNetUnfolderBase]: For 332702/332719 co-relation queries the response was YES. [2024-06-04 14:07:22,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29143 conditions, 4354 events. 2516/4354 cut-off events. For 332702/332719 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28995 event pairs, 785 based on Foata normal form. 18/4368 useless extension candidates. Maximal degree in co-relation 29039. Up to 1768 conditions per place. [2024-06-04 14:07:22,856 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 154 selfloop transitions, 62 changer transitions 11/233 dead transitions. [2024-06-04 14:07:22,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 233 transitions, 2928 flow [2024-06-04 14:07:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 14:07:22,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-04 14:07:22,857 INFO L175 Difference]: Start difference. First operand has 205 places, 185 transitions, 2032 flow. Second operand 9 states and 212 transitions. [2024-06-04 14:07:22,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 233 transitions, 2928 flow [2024-06-04 14:07:23,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 233 transitions, 2797 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:23,255 INFO L231 Difference]: Finished difference. Result has 205 places, 184 transitions, 2043 flow [2024-06-04 14:07:23,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2043, PETRI_PLACES=205, PETRI_TRANSITIONS=184} [2024-06-04 14:07:23,256 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-04 14:07:23,256 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 184 transitions, 2043 flow [2024-06-04 14:07:23,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:23,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:23,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:23,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:07:23,256 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1944055328, now seen corresponding path program 3 times [2024-06-04 14:07:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633165327] [2024-06-04 14:07:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:23,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633165327] [2024-06-04 14:07:23,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633165327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:23,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:23,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650124195] [2024-06-04 14:07:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:23,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:23,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:23,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:23,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 184 transitions, 2043 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:23,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:23,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:23,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:23,984 INFO L124 PetriNetUnfolderBase]: 2399/4175 cut-off events. [2024-06-04 14:07:23,985 INFO L125 PetriNetUnfolderBase]: For 312543/312560 co-relation queries the response was YES. [2024-06-04 14:07:24,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26639 conditions, 4175 events. 2399/4175 cut-off events. For 312543/312560 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27944 event pairs, 870 based on Foata normal form. 42/4213 useless extension candidates. Maximal degree in co-relation 26535. Up to 2889 conditions per place. [2024-06-04 14:07:24,021 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 152 selfloop transitions, 53 changer transitions 18/229 dead transitions. [2024-06-04 14:07:24,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 229 transitions, 2765 flow [2024-06-04 14:07:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-04 14:07:24,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-04 14:07:24,022 INFO L175 Difference]: Start difference. First operand has 205 places, 184 transitions, 2043 flow. Second operand 10 states and 229 transitions. [2024-06-04 14:07:24,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 229 transitions, 2765 flow [2024-06-04 14:07:24,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 229 transitions, 2634 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:24,496 INFO L231 Difference]: Finished difference. Result has 203 places, 176 transitions, 1935 flow [2024-06-04 14:07:24,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1935, PETRI_PLACES=203, PETRI_TRANSITIONS=176} [2024-06-04 14:07:24,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-04 14:07:24,497 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 176 transitions, 1935 flow [2024-06-04 14:07:24,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:24,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:24,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:24,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:07:24,497 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:24,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:24,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1944294338, now seen corresponding path program 4 times [2024-06-04 14:07:24,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:24,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257576952] [2024-06-04 14:07:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:24,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:24,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:24,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257576952] [2024-06-04 14:07:24,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257576952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:24,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:24,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:24,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758326279] [2024-06-04 14:07:24,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:24,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:24,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:24,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:24,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 176 transitions, 1935 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:24,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:24,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:24,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:25,100 INFO L124 PetriNetUnfolderBase]: 2157/3756 cut-off events. [2024-06-04 14:07:25,100 INFO L125 PetriNetUnfolderBase]: For 268247/268264 co-relation queries the response was YES. [2024-06-04 14:07:25,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23451 conditions, 3756 events. 2157/3756 cut-off events. For 268247/268264 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 24625 event pairs, 804 based on Foata normal form. 46/3798 useless extension candidates. Maximal degree in co-relation 23349. Up to 3145 conditions per place. [2024-06-04 14:07:25,132 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 47 changer transitions 23/212 dead transitions. [2024-06-04 14:07:25,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 212 transitions, 2477 flow [2024-06-04 14:07:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-04 14:07:25,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-04 14:07:25,133 INFO L175 Difference]: Start difference. First operand has 203 places, 176 transitions, 1935 flow. Second operand 10 states and 218 transitions. [2024-06-04 14:07:25,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 212 transitions, 2477 flow [2024-06-04 14:07:25,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 212 transitions, 2364 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:25,483 INFO L231 Difference]: Finished difference. Result has 200 places, 169 transitions, 1854 flow [2024-06-04 14:07:25,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1826, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1854, PETRI_PLACES=200, PETRI_TRANSITIONS=169} [2024-06-04 14:07:25,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-04 14:07:25,483 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 169 transitions, 1854 flow [2024-06-04 14:07:25,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:25,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:25,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:25,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:07:25,484 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:25,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1146231264, now seen corresponding path program 5 times [2024-06-04 14:07:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:25,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952735561] [2024-06-04 14:07:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:25,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952735561] [2024-06-04 14:07:25,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952735561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:25,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:25,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645641107] [2024-06-04 14:07:25,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:25,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:25,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:25,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 169 transitions, 1854 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:25,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:25,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:25,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:26,039 INFO L124 PetriNetUnfolderBase]: 2061/3585 cut-off events. [2024-06-04 14:07:26,039 INFO L125 PetriNetUnfolderBase]: For 213473/213489 co-relation queries the response was YES. [2024-06-04 14:07:26,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22426 conditions, 3585 events. 2061/3585 cut-off events. For 213473/213489 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23287 event pairs, 768 based on Foata normal form. 19/3600 useless extension candidates. Maximal degree in co-relation 22326. Up to 3141 conditions per place. [2024-06-04 14:07:26,069 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 45 changer transitions 10/196 dead transitions. [2024-06-04 14:07:26,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 2330 flow [2024-06-04 14:07:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 14:07:26,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2024-06-04 14:07:26,070 INFO L175 Difference]: Start difference. First operand has 200 places, 169 transitions, 1854 flow. Second operand 9 states and 193 transitions. [2024-06-04 14:07:26,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 2330 flow [2024-06-04 14:07:26,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 196 transitions, 2224 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:26,440 INFO L231 Difference]: Finished difference. Result has 193 places, 166 transitions, 1811 flow [2024-06-04 14:07:26,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1811, PETRI_PLACES=193, PETRI_TRANSITIONS=166} [2024-06-04 14:07:26,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-04 14:07:26,440 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 166 transitions, 1811 flow [2024-06-04 14:07:26,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:26,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:26,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:26,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:07:26,440 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:26,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash 26777568, now seen corresponding path program 6 times [2024-06-04 14:07:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386855028] [2024-06-04 14:07:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:26,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:26,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386855028] [2024-06-04 14:07:26,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386855028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:26,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:26,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9431043] [2024-06-04 14:07:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:26,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:26,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:26,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:26,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 166 transitions, 1811 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:26,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:26,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:26,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:27,019 INFO L124 PetriNetUnfolderBase]: 2229/3852 cut-off events. [2024-06-04 14:07:27,019 INFO L125 PetriNetUnfolderBase]: For 233378/233394 co-relation queries the response was YES. [2024-06-04 14:07:27,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24744 conditions, 3852 events. 2229/3852 cut-off events. For 233378/233394 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25316 event pairs, 840 based on Foata normal form. 19/3867 useless extension candidates. Maximal degree in co-relation 24647. Up to 3107 conditions per place. [2024-06-04 14:07:27,047 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 42 changer transitions 14/201 dead transitions. [2024-06-04 14:07:27,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 201 transitions, 2453 flow [2024-06-04 14:07:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 14:07:27,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-04 14:07:27,048 INFO L175 Difference]: Start difference. First operand has 193 places, 166 transitions, 1811 flow. Second operand 9 states and 199 transitions. [2024-06-04 14:07:27,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 201 transitions, 2453 flow [2024-06-04 14:07:27,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 201 transitions, 2353 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:27,382 INFO L231 Difference]: Finished difference. Result has 192 places, 162 transitions, 1752 flow [2024-06-04 14:07:27,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=192, PETRI_TRANSITIONS=162} [2024-06-04 14:07:27,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-04 14:07:27,383 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 162 transitions, 1752 flow [2024-06-04 14:07:27,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:27,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:27,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:27,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:07:27,383 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:27,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1655785022, now seen corresponding path program 7 times [2024-06-04 14:07:27,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:27,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692956354] [2024-06-04 14:07:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:27,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:27,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:27,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692956354] [2024-06-04 14:07:27,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692956354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:27,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:27,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:27,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514654685] [2024-06-04 14:07:27,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:27,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:27,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:27,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:27,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:27,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 162 transitions, 1752 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:27,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:27,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:27,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:27,941 INFO L124 PetriNetUnfolderBase]: 2102/3648 cut-off events. [2024-06-04 14:07:27,941 INFO L125 PetriNetUnfolderBase]: For 215194/215200 co-relation queries the response was YES. [2024-06-04 14:07:27,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22267 conditions, 3648 events. 2102/3648 cut-off events. For 215194/215200 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23939 event pairs, 686 based on Foata normal form. 34/3678 useless extension candidates. Maximal degree in co-relation 22170. Up to 2035 conditions per place. [2024-06-04 14:07:27,968 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 32 changer transitions 21/192 dead transitions. [2024-06-04 14:07:27,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 192 transitions, 2348 flow [2024-06-04 14:07:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:07:27,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-04 14:07:27,969 INFO L175 Difference]: Start difference. First operand has 192 places, 162 transitions, 1752 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:07:27,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 192 transitions, 2348 flow [2024-06-04 14:07:28,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 192 transitions, 2242 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:28,213 INFO L231 Difference]: Finished difference. Result has 187 places, 151 transitions, 1591 flow [2024-06-04 14:07:28,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1591, PETRI_PLACES=187, PETRI_TRANSITIONS=151} [2024-06-04 14:07:28,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-04 14:07:28,214 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 151 transitions, 1591 flow [2024-06-04 14:07:28,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:28,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:28,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:28,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:07:28,214 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:28,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1478290244, now seen corresponding path program 1 times [2024-06-04 14:07:28,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:28,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415633252] [2024-06-04 14:07:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:28,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415633252] [2024-06-04 14:07:28,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415633252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:28,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:28,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:28,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638517764] [2024-06-04 14:07:28,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:28,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:28,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:28,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:28,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 151 transitions, 1591 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:28,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:28,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:28,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:28,692 INFO L124 PetriNetUnfolderBase]: 1868/3255 cut-off events. [2024-06-04 14:07:28,693 INFO L125 PetriNetUnfolderBase]: For 185800/185806 co-relation queries the response was YES. [2024-06-04 14:07:28,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20781 conditions, 3255 events. 1868/3255 cut-off events. For 185800/185806 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21089 event pairs, 620 based on Foata normal form. 10/3261 useless extension candidates. Maximal degree in co-relation 20685. Up to 2685 conditions per place. [2024-06-04 14:07:28,716 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 134 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-04 14:07:28,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 174 transitions, 2135 flow [2024-06-04 14:07:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 14:07:28,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:07:28,717 INFO L175 Difference]: Start difference. First operand has 187 places, 151 transitions, 1591 flow. Second operand 6 states and 140 transitions. [2024-06-04 14:07:28,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 174 transitions, 2135 flow [2024-06-04 14:07:28,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 174 transitions, 2040 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:28,933 INFO L231 Difference]: Finished difference. Result has 177 places, 153 transitions, 1616 flow [2024-06-04 14:07:28,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1616, PETRI_PLACES=177, PETRI_TRANSITIONS=153} [2024-06-04 14:07:28,933 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-04 14:07:28,933 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 153 transitions, 1616 flow [2024-06-04 14:07:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:28,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:28,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:28,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:07:28,933 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:28,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash 342834050, now seen corresponding path program 8 times [2024-06-04 14:07:28,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:28,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649027666] [2024-06-04 14:07:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:28,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:29,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649027666] [2024-06-04 14:07:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649027666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:29,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:29,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97564927] [2024-06-04 14:07:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:29,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:29,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 153 transitions, 1616 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:29,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:29,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:29,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:29,436 INFO L124 PetriNetUnfolderBase]: 1799/3140 cut-off events. [2024-06-04 14:07:29,436 INFO L125 PetriNetUnfolderBase]: For 158375/158381 co-relation queries the response was YES. [2024-06-04 14:07:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18469 conditions, 3140 events. 1799/3140 cut-off events. For 158375/158381 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20161 event pairs, 683 based on Foata normal form. 38/3174 useless extension candidates. Maximal degree in co-relation 18378. Up to 2613 conditions per place. [2024-06-04 14:07:29,459 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 26 changer transitions 21/173 dead transitions. [2024-06-04 14:07:29,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 2026 flow [2024-06-04 14:07:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 14:07:29,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-04 14:07:29,459 INFO L175 Difference]: Start difference. First operand has 177 places, 153 transitions, 1616 flow. Second operand 7 states and 156 transitions. [2024-06-04 14:07:29,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 2026 flow [2024-06-04 14:07:29,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 173 transitions, 1976 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:29,669 INFO L231 Difference]: Finished difference. Result has 181 places, 143 transitions, 1515 flow [2024-06-04 14:07:29,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=181, PETRI_TRANSITIONS=143} [2024-06-04 14:07:29,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-04 14:07:29,671 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 143 transitions, 1515 flow [2024-06-04 14:07:29,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:29,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:29,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:29,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:07:29,671 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:29,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1360326812, now seen corresponding path program 9 times [2024-06-04 14:07:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246698560] [2024-06-04 14:07:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:29,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:29,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246698560] [2024-06-04 14:07:29,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246698560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:29,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:29,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:29,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449781876] [2024-06-04 14:07:29,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:29,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:29,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:29,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 143 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:29,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:29,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:29,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:30,117 INFO L124 PetriNetUnfolderBase]: 1578/2747 cut-off events. [2024-06-04 14:07:30,118 INFO L125 PetriNetUnfolderBase]: For 123253/123259 co-relation queries the response was YES. [2024-06-04 14:07:30,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15328 conditions, 2747 events. 1578/2747 cut-off events. For 123253/123259 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17029 event pairs, 558 based on Foata normal form. 38/2781 useless extension candidates. Maximal degree in co-relation 15236. Up to 2250 conditions per place. [2024-06-04 14:07:30,136 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 25 changer transitions 7/160 dead transitions. [2024-06-04 14:07:30,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 160 transitions, 1891 flow [2024-06-04 14:07:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-04 14:07:30,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 14:07:30,137 INFO L175 Difference]: Start difference. First operand has 181 places, 143 transitions, 1515 flow. Second operand 7 states and 150 transitions. [2024-06-04 14:07:30,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 160 transitions, 1891 flow [2024-06-04 14:07:30,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 160 transitions, 1823 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:30,249 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1443 flow [2024-06-04 14:07:30,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1443, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2024-06-04 14:07:30,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-04 14:07:30,249 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1443 flow [2024-06-04 14:07:30,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:30,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:30,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:30,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:07:30,249 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:30,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1359957850, now seen corresponding path program 1 times [2024-06-04 14:07:30,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:30,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429833561] [2024-06-04 14:07:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:30,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:30,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429833561] [2024-06-04 14:07:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429833561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:30,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:30,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:30,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293826146] [2024-06-04 14:07:30,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:30,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:30,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:30,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:30,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1443 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:30,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:30,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:30,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:30,722 INFO L124 PetriNetUnfolderBase]: 1498/2627 cut-off events. [2024-06-04 14:07:30,723 INFO L125 PetriNetUnfolderBase]: For 100285/100291 co-relation queries the response was YES. [2024-06-04 14:07:30,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14545 conditions, 2627 events. 1498/2627 cut-off events. For 100285/100291 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16204 event pairs, 383 based on Foata normal form. 34/2657 useless extension candidates. Maximal degree in co-relation 14458. Up to 2022 conditions per place. [2024-06-04 14:07:30,740 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 124 selfloop transitions, 32 changer transitions 5/167 dead transitions. [2024-06-04 14:07:30,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 167 transitions, 1950 flow [2024-06-04 14:07:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-04 14:07:30,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-04 14:07:30,743 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1443 flow. Second operand 8 states and 173 transitions. [2024-06-04 14:07:30,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 167 transitions, 1950 flow [2024-06-04 14:07:30,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 167 transitions, 1870 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-04 14:07:30,854 INFO L231 Difference]: Finished difference. Result has 167 places, 141 transitions, 1505 flow [2024-06-04 14:07:30,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1505, PETRI_PLACES=167, PETRI_TRANSITIONS=141} [2024-06-04 14:07:30,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-04 14:07:30,855 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 141 transitions, 1505 flow [2024-06-04 14:07:30,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:30,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:30,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:30,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:07:30,856 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:30,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1359957664, now seen corresponding path program 1 times [2024-06-04 14:07:30,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:30,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876074317] [2024-06-04 14:07:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:30,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:30,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:30,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876074317] [2024-06-04 14:07:30,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876074317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:30,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21438654] [2024-06-04 14:07:30,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:30,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:30,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:30,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:30,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 141 transitions, 1505 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:30,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:30,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:31,249 INFO L124 PetriNetUnfolderBase]: 1384/2423 cut-off events. [2024-06-04 14:07:31,249 INFO L125 PetriNetUnfolderBase]: For 72555/72558 co-relation queries the response was YES. [2024-06-04 14:07:31,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13495 conditions, 2423 events. 1384/2423 cut-off events. For 72555/72558 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14584 event pairs, 363 based on Foata normal form. 8/2427 useless extension candidates. Maximal degree in co-relation 13410. Up to 1930 conditions per place. [2024-06-04 14:07:31,265 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 121 selfloop transitions, 34 changer transitions 0/161 dead transitions. [2024-06-04 14:07:31,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 161 transitions, 1891 flow [2024-06-04 14:07:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 14:07:31,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-04 14:07:31,266 INFO L175 Difference]: Start difference. First operand has 167 places, 141 transitions, 1505 flow. Second operand 6 states and 138 transitions. [2024-06-04 14:07:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 161 transitions, 1891 flow [2024-06-04 14:07:31,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 161 transitions, 1806 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:31,357 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1496 flow [2024-06-04 14:07:31,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1496, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-06-04 14:07:31,358 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-04 14:07:31,358 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1496 flow [2024-06-04 14:07:31,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:31,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:31,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:31,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:07:31,358 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:31,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash -317784606, now seen corresponding path program 2 times [2024-06-04 14:07:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:31,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166652364] [2024-06-04 14:07:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:31,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166652364] [2024-06-04 14:07:31,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166652364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:31,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:31,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:31,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421827909] [2024-06-04 14:07:31,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:31,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:31,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1496 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:31,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:31,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:31,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:31,748 INFO L124 PetriNetUnfolderBase]: 1344/2321 cut-off events. [2024-06-04 14:07:31,748 INFO L125 PetriNetUnfolderBase]: For 67255/67258 co-relation queries the response was YES. [2024-06-04 14:07:31,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12724 conditions, 2321 events. 1344/2321 cut-off events. For 67255/67258 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13564 event pairs, 423 based on Foata normal form. 10/2327 useless extension candidates. Maximal degree in co-relation 12640. Up to 1938 conditions per place. [2024-06-04 14:07:31,762 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 22 changer transitions 9/162 dead transitions. [2024-06-04 14:07:31,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 162 transitions, 1972 flow [2024-06-04 14:07:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 14:07:31,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-04 14:07:31,763 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1496 flow. Second operand 8 states and 167 transitions. [2024-06-04 14:07:31,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 162 transitions, 1972 flow [2024-06-04 14:07:31,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 162 transitions, 1872 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:31,845 INFO L231 Difference]: Finished difference. Result has 168 places, 137 transitions, 1394 flow [2024-06-04 14:07:31,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=168, PETRI_TRANSITIONS=137} [2024-06-04 14:07:31,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-04 14:07:31,846 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 137 transitions, 1394 flow [2024-06-04 14:07:31,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:31,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:31,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:31,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:07:31,846 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:31,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash -214580646, now seen corresponding path program 3 times [2024-06-04 14:07:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:31,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972236903] [2024-06-04 14:07:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:31,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972236903] [2024-06-04 14:07:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972236903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:31,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:31,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694470124] [2024-06-04 14:07:31,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:31,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:31,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:31,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 137 transitions, 1394 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:31,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:31,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:31,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:32,183 INFO L124 PetriNetUnfolderBase]: 1176/2027 cut-off events. [2024-06-04 14:07:32,183 INFO L125 PetriNetUnfolderBase]: For 59283/59286 co-relation queries the response was YES. [2024-06-04 14:07:32,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 2027 events. 1176/2027 cut-off events. For 59283/59286 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11520 event pairs, 349 based on Foata normal form. 10/2033 useless extension candidates. Maximal degree in co-relation 10938. Up to 1752 conditions per place. [2024-06-04 14:07:32,197 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 18 changer transitions 12/153 dead transitions. [2024-06-04 14:07:32,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 153 transitions, 1744 flow [2024-06-04 14:07:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-04 14:07:32,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:07:32,198 INFO L175 Difference]: Start difference. First operand has 168 places, 137 transitions, 1394 flow. Second operand 8 states and 160 transitions. [2024-06-04 14:07:32,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 153 transitions, 1744 flow [2024-06-04 14:07:32,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 153 transitions, 1680 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:32,265 INFO L231 Difference]: Finished difference. Result has 160 places, 132 transitions, 1317 flow [2024-06-04 14:07:32,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=160, PETRI_TRANSITIONS=132} [2024-06-04 14:07:32,265 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-04 14:07:32,265 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 132 transitions, 1317 flow [2024-06-04 14:07:32,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:32,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:32,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:32,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:07:32,266 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:32,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash 26421414, now seen corresponding path program 4 times [2024-06-04 14:07:32,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:32,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497227952] [2024-06-04 14:07:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:32,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:32,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497227952] [2024-06-04 14:07:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497227952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:32,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949757624] [2024-06-04 14:07:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:32,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:32,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:32,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 132 transitions, 1317 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:32,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:32,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:32,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:32,693 INFO L124 PetriNetUnfolderBase]: 1094/1883 cut-off events. [2024-06-04 14:07:32,693 INFO L125 PetriNetUnfolderBase]: For 52307/52310 co-relation queries the response was YES. [2024-06-04 14:07:32,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10354 conditions, 1883 events. 1094/1883 cut-off events. For 52307/52310 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10460 event pairs, 245 based on Foata normal form. 8/1887 useless extension candidates. Maximal degree in co-relation 10274. Up to 1556 conditions per place. [2024-06-04 14:07:32,703 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 30 changer transitions 0/153 dead transitions. [2024-06-04 14:07:32,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 153 transitions, 1711 flow [2024-06-04 14:07:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:32,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 14:07:32,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-04 14:07:32,703 INFO L175 Difference]: Start difference. First operand has 160 places, 132 transitions, 1317 flow. Second operand 8 states and 167 transitions. [2024-06-04 14:07:32,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 153 transitions, 1711 flow [2024-06-04 14:07:32,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 153 transitions, 1630 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:32,748 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 1334 flow [2024-06-04 14:07:32,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1334, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2024-06-04 14:07:32,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-04 14:07:32,749 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 1334 flow [2024-06-04 14:07:32,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:32,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:32,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:32,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:07:32,749 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:32,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1239035288, now seen corresponding path program 5 times [2024-06-04 14:07:32,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:32,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142970550] [2024-06-04 14:07:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:32,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:32,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:32,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142970550] [2024-06-04 14:07:32,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142970550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:32,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:32,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992546792] [2024-06-04 14:07:32,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:32,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:32,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:32,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:32,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:32,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:32,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:32,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:32,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:33,066 INFO L124 PetriNetUnfolderBase]: 1114/1915 cut-off events. [2024-06-04 14:07:33,066 INFO L125 PetriNetUnfolderBase]: For 42675/42678 co-relation queries the response was YES. [2024-06-04 14:07:33,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10049 conditions, 1915 events. 1114/1915 cut-off events. For 42675/42678 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10682 event pairs, 248 based on Foata normal form. 8/1919 useless extension candidates. Maximal degree in co-relation 9975. Up to 1508 conditions per place. [2024-06-04 14:07:33,077 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 118 selfloop transitions, 32 changer transitions 0/156 dead transitions. [2024-06-04 14:07:33,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 1736 flow [2024-06-04 14:07:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 14:07:33,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-04 14:07:33,078 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 1334 flow. Second operand 8 states and 168 transitions. [2024-06-04 14:07:33,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 1736 flow [2024-06-04 14:07:33,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 156 transitions, 1628 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:33,124 INFO L231 Difference]: Finished difference. Result has 150 places, 134 transitions, 1318 flow [2024-06-04 14:07:33,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=150, PETRI_TRANSITIONS=134} [2024-06-04 14:07:33,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-04 14:07:33,125 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 134 transitions, 1318 flow [2024-06-04 14:07:33,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:33,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:33,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:33,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:07:33,125 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:33,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:33,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1174173086, now seen corresponding path program 2 times [2024-06-04 14:07:33,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:33,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828918078] [2024-06-04 14:07:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:33,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:33,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828918078] [2024-06-04 14:07:33,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828918078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:33,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640397208] [2024-06-04 14:07:33,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:33,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:33,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 134 transitions, 1318 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:33,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:33,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:33,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:33,457 INFO L124 PetriNetUnfolderBase]: 1134/1949 cut-off events. [2024-06-04 14:07:33,457 INFO L125 PetriNetUnfolderBase]: For 44751/44754 co-relation queries the response was YES. [2024-06-04 14:07:33,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10193 conditions, 1949 events. 1134/1949 cut-off events. For 44751/44754 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10924 event pairs, 338 based on Foata normal form. 8/1943 useless extension candidates. Maximal degree in co-relation 10119. Up to 1598 conditions per place. [2024-06-04 14:07:33,468 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 31 changer transitions 0/161 dead transitions. [2024-06-04 14:07:33,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 161 transitions, 1800 flow [2024-06-04 14:07:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-04 14:07:33,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-04 14:07:33,469 INFO L175 Difference]: Start difference. First operand has 150 places, 134 transitions, 1318 flow. Second operand 8 states and 175 transitions. [2024-06-04 14:07:33,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 161 transitions, 1800 flow [2024-06-04 14:07:33,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 161 transitions, 1720 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:33,521 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 1326 flow [2024-06-04 14:07:33,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1326, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-06-04 14:07:33,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-04 14:07:33,521 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 1326 flow [2024-06-04 14:07:33,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:33,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:33,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:33,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:07:33,522 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:33,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1174233536, now seen corresponding path program 3 times [2024-06-04 14:07:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:33,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042573869] [2024-06-04 14:07:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:33,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:33,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042573869] [2024-06-04 14:07:33,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042573869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:33,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:33,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:33,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174381086] [2024-06-04 14:07:33,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:33,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:33,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:33,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:33,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:33,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:33,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:33,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:33,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:33,853 INFO L124 PetriNetUnfolderBase]: 1116/1928 cut-off events. [2024-06-04 14:07:33,853 INFO L125 PetriNetUnfolderBase]: For 42800/42803 co-relation queries the response was YES. [2024-06-04 14:07:33,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9757 conditions, 1928 events. 1116/1928 cut-off events. For 42800/42803 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10836 event pairs, 341 based on Foata normal form. 10/1929 useless extension candidates. Maximal degree in co-relation 9682. Up to 1632 conditions per place. [2024-06-04 14:07:33,864 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 28 changer transitions 0/153 dead transitions. [2024-06-04 14:07:33,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 153 transitions, 1678 flow [2024-06-04 14:07:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-04 14:07:33,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 14:07:33,865 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 1326 flow. Second operand 7 states and 152 transitions. [2024-06-04 14:07:33,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 153 transitions, 1678 flow [2024-06-04 14:07:33,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 153 transitions, 1598 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:33,912 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1307 flow [2024-06-04 14:07:33,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2024-06-04 14:07:33,912 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-04 14:07:33,912 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1307 flow [2024-06-04 14:07:33,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:33,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:33,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:33,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:07:33,912 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:33,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1459272956, now seen corresponding path program 4 times [2024-06-04 14:07:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:33,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640959516] [2024-06-04 14:07:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:33,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:34,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:34,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640959516] [2024-06-04 14:07:34,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640959516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:34,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428028385] [2024-06-04 14:07:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:34,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:34,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:34,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1307 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:34,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:34,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:34,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:34,280 INFO L124 PetriNetUnfolderBase]: 1136/1959 cut-off events. [2024-06-04 14:07:34,281 INFO L125 PetriNetUnfolderBase]: For 43016/43019 co-relation queries the response was YES. [2024-06-04 14:07:34,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9834 conditions, 1959 events. 1136/1959 cut-off events. For 43016/43019 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11003 event pairs, 246 based on Foata normal form. 8/1957 useless extension candidates. Maximal degree in co-relation 9758. Up to 1545 conditions per place. [2024-06-04 14:07:34,292 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 120 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-04 14:07:34,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 162 transitions, 1797 flow [2024-06-04 14:07:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 14:07:34,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-04 14:07:34,293 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1307 flow. Second operand 7 states and 159 transitions. [2024-06-04 14:07:34,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 162 transitions, 1797 flow [2024-06-04 14:07:34,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 162 transitions, 1714 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:34,342 INFO L231 Difference]: Finished difference. Result has 154 places, 136 transitions, 1324 flow [2024-06-04 14:07:34,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=154, PETRI_TRANSITIONS=136} [2024-06-04 14:07:34,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-04 14:07:34,342 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 136 transitions, 1324 flow [2024-06-04 14:07:34,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:34,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:34,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:34,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:07:34,343 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:34,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1470700796, now seen corresponding path program 5 times [2024-06-04 14:07:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604257418] [2024-06-04 14:07:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:34,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:34,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604257418] [2024-06-04 14:07:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604257418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:34,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:34,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800325916] [2024-06-04 14:07:34,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:34,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:34,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:34,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 136 transitions, 1324 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:34,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:34,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:34,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:34,630 INFO L124 PetriNetUnfolderBase]: 1143/1976 cut-off events. [2024-06-04 14:07:34,631 INFO L125 PetriNetUnfolderBase]: For 44252/44252 co-relation queries the response was YES. [2024-06-04 14:07:34,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 1976 events. 1143/1976 cut-off events. For 44252/44252 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11161 event pairs, 210 based on Foata normal form. 6/1971 useless extension candidates. Maximal degree in co-relation 9900. Up to 1125 conditions per place. [2024-06-04 14:07:34,642 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 108 selfloop transitions, 44 changer transitions 0/158 dead transitions. [2024-06-04 14:07:34,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 158 transitions, 1804 flow [2024-06-04 14:07:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 14:07:34,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 14:07:34,643 INFO L175 Difference]: Start difference. First operand has 154 places, 136 transitions, 1324 flow. Second operand 6 states and 136 transitions. [2024-06-04 14:07:34,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 158 transitions, 1804 flow [2024-06-04 14:07:34,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 158 transitions, 1716 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:34,695 INFO L231 Difference]: Finished difference. Result has 155 places, 137 transitions, 1352 flow [2024-06-04 14:07:34,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1352, PETRI_PLACES=155, PETRI_TRANSITIONS=137} [2024-06-04 14:07:34,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-04 14:07:34,696 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 137 transitions, 1352 flow [2024-06-04 14:07:34,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:34,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:34,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:07:34,696 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:34,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1856888870, now seen corresponding path program 6 times [2024-06-04 14:07:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830593520] [2024-06-04 14:07:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:34,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:34,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:34,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830593520] [2024-06-04 14:07:34,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830593520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:34,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:34,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:34,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811558992] [2024-06-04 14:07:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:34,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:34,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:34,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:34,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 137 transitions, 1352 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:34,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:34,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:34,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:35,039 INFO L124 PetriNetUnfolderBase]: 1125/1955 cut-off events. [2024-06-04 14:07:35,039 INFO L125 PetriNetUnfolderBase]: For 41683/41683 co-relation queries the response was YES. [2024-06-04 14:07:35,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9647 conditions, 1955 events. 1125/1955 cut-off events. For 41683/41683 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11108 event pairs, 356 based on Foata normal form. 8/1957 useless extension candidates. Maximal degree in co-relation 9569. Up to 1651 conditions per place. [2024-06-04 14:07:35,052 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 112 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-04 14:07:35,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 149 transitions, 1680 flow [2024-06-04 14:07:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-04 14:07:35,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-04 14:07:35,053 INFO L175 Difference]: Start difference. First operand has 155 places, 137 transitions, 1352 flow. Second operand 7 states and 147 transitions. [2024-06-04 14:07:35,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 149 transitions, 1680 flow [2024-06-04 14:07:35,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 149 transitions, 1605 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 14:07:35,120 INFO L231 Difference]: Finished difference. Result has 159 places, 137 transitions, 1344 flow [2024-06-04 14:07:35,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1344, PETRI_PLACES=159, PETRI_TRANSITIONS=137} [2024-06-04 14:07:35,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-04 14:07:35,121 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 137 transitions, 1344 flow [2024-06-04 14:07:35,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:35,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:35,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:35,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:07:35,121 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:35,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash 23382812, now seen corresponding path program 6 times [2024-06-04 14:07:35,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:35,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989842028] [2024-06-04 14:07:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:35,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:35,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989842028] [2024-06-04 14:07:35,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989842028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:35,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:35,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102800325] [2024-06-04 14:07:35,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:35,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:35,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:35,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:35,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 137 transitions, 1344 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:35,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:35,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:35,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:35,551 INFO L124 PetriNetUnfolderBase]: 1394/2407 cut-off events. [2024-06-04 14:07:35,551 INFO L125 PetriNetUnfolderBase]: For 88360/88360 co-relation queries the response was YES. [2024-06-04 14:07:35,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12576 conditions, 2407 events. 1394/2407 cut-off events. For 88360/88360 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14241 event pairs, 438 based on Foata normal form. 30/2431 useless extension candidates. Maximal degree in co-relation 12497. Up to 1571 conditions per place. [2024-06-04 14:07:35,565 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 99 selfloop transitions, 59 changer transitions 4/168 dead transitions. [2024-06-04 14:07:35,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 168 transitions, 1915 flow [2024-06-04 14:07:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-04 14:07:35,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-04 14:07:35,566 INFO L175 Difference]: Start difference. First operand has 159 places, 137 transitions, 1344 flow. Second operand 10 states and 215 transitions. [2024-06-04 14:07:35,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 168 transitions, 1915 flow [2024-06-04 14:07:35,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 168 transitions, 1840 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:35,651 INFO L231 Difference]: Finished difference. Result has 164 places, 140 transitions, 1463 flow [2024-06-04 14:07:35,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1463, PETRI_PLACES=164, PETRI_TRANSITIONS=140} [2024-06-04 14:07:35,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-04 14:07:35,652 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 140 transitions, 1463 flow [2024-06-04 14:07:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:35,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:35,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:35,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:07:35,652 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:35,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash -789865812, now seen corresponding path program 7 times [2024-06-04 14:07:35,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:35,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947914960] [2024-06-04 14:07:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:35,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:35,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947914960] [2024-06-04 14:07:35,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947914960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:35,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:35,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662396781] [2024-06-04 14:07:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:35,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:35,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:35,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:35,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 140 transitions, 1463 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:35,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:35,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:35,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:36,058 INFO L124 PetriNetUnfolderBase]: 1295/2256 cut-off events. [2024-06-04 14:07:36,058 INFO L125 PetriNetUnfolderBase]: For 68609/68609 co-relation queries the response was YES. [2024-06-04 14:07:36,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 2256 events. 1295/2256 cut-off events. For 68609/68609 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13188 event pairs, 447 based on Foata normal form. 34/2284 useless extension candidates. Maximal degree in co-relation 10788. Up to 1741 conditions per place. [2024-06-04 14:07:36,072 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 52 changer transitions 3/159 dead transitions. [2024-06-04 14:07:36,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 159 transitions, 1835 flow [2024-06-04 14:07:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 14:07:36,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-04 14:07:36,073 INFO L175 Difference]: Start difference. First operand has 164 places, 140 transitions, 1463 flow. Second operand 9 states and 190 transitions. [2024-06-04 14:07:36,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 159 transitions, 1835 flow [2024-06-04 14:07:36,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 159 transitions, 1685 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:36,143 INFO L231 Difference]: Finished difference. Result has 164 places, 139 transitions, 1417 flow [2024-06-04 14:07:36,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1417, PETRI_PLACES=164, PETRI_TRANSITIONS=139} [2024-06-04 14:07:36,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-04 14:07:36,144 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 139 transitions, 1417 flow [2024-06-04 14:07:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:36,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:36,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:36,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:07:36,144 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:36,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1959420732, now seen corresponding path program 2 times [2024-06-04 14:07:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:36,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079799327] [2024-06-04 14:07:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:36,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:36,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079799327] [2024-06-04 14:07:36,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079799327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:36,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630241195] [2024-06-04 14:07:36,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:36,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:36,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:36,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 139 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:36,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:36,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:36,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:36,490 INFO L124 PetriNetUnfolderBase]: 1305/2265 cut-off events. [2024-06-04 14:07:36,490 INFO L125 PetriNetUnfolderBase]: For 44680/44680 co-relation queries the response was YES. [2024-06-04 14:07:36,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10756 conditions, 2265 events. 1305/2265 cut-off events. For 44680/44680 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13298 event pairs, 432 based on Foata normal form. 6/2265 useless extension candidates. Maximal degree in co-relation 10676. Up to 1885 conditions per place. [2024-06-04 14:07:36,503 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 114 selfloop transitions, 36 changer transitions 0/156 dead transitions. [2024-06-04 14:07:36,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 156 transitions, 1800 flow [2024-06-04 14:07:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-04 14:07:36,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-04 14:07:36,504 INFO L175 Difference]: Start difference. First operand has 164 places, 139 transitions, 1417 flow. Second operand 8 states and 166 transitions. [2024-06-04 14:07:36,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 156 transitions, 1800 flow [2024-06-04 14:07:36,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 156 transitions, 1700 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:36,572 INFO L231 Difference]: Finished difference. Result has 165 places, 140 transitions, 1421 flow [2024-06-04 14:07:36,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1421, PETRI_PLACES=165, PETRI_TRANSITIONS=140} [2024-06-04 14:07:36,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-04 14:07:36,573 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 140 transitions, 1421 flow [2024-06-04 14:07:36,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:36,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:36,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:07:36,573 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash 436689878, now seen corresponding path program 3 times [2024-06-04 14:07:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:36,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846505157] [2024-06-04 14:07:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:36,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:36,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846505157] [2024-06-04 14:07:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846505157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:36,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:36,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:36,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481746998] [2024-06-04 14:07:36,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:36,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:36,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:36,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:36,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 140 transitions, 1421 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:36,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:36,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:36,939 INFO L124 PetriNetUnfolderBase]: 1325/2302 cut-off events. [2024-06-04 14:07:36,939 INFO L125 PetriNetUnfolderBase]: For 47496/47496 co-relation queries the response was YES. [2024-06-04 14:07:36,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 2302 events. 1325/2302 cut-off events. For 47496/47496 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13493 event pairs, 328 based on Foata normal form. 6/2302 useless extension candidates. Maximal degree in co-relation 10947. Up to 1781 conditions per place. [2024-06-04 14:07:36,953 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 107 selfloop transitions, 47 changer transitions 0/160 dead transitions. [2024-06-04 14:07:36,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 160 transitions, 1836 flow [2024-06-04 14:07:36,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:36,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-04 14:07:36,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 14:07:36,954 INFO L175 Difference]: Start difference. First operand has 165 places, 140 transitions, 1421 flow. Second operand 7 states and 155 transitions. [2024-06-04 14:07:36,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 160 transitions, 1836 flow [2024-06-04 14:07:37,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 160 transitions, 1747 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:37,021 INFO L231 Difference]: Finished difference. Result has 166 places, 141 transitions, 1459 flow [2024-06-04 14:07:37,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1459, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2024-06-04 14:07:37,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-04 14:07:37,021 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 1459 flow [2024-06-04 14:07:37,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:37,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:37,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:37,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:07:37,021 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:37,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 436689692, now seen corresponding path program 8 times [2024-06-04 14:07:37,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104884725] [2024-06-04 14:07:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:37,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:37,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104884725] [2024-06-04 14:07:37,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104884725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:37,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:37,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494415736] [2024-06-04 14:07:37,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:37,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:37,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:37,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:37,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:37,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:37,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 141 transitions, 1459 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:37,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:37,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:37,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:37,452 INFO L124 PetriNetUnfolderBase]: 1548/2683 cut-off events. [2024-06-04 14:07:37,453 INFO L125 PetriNetUnfolderBase]: For 94615/94615 co-relation queries the response was YES. [2024-06-04 14:07:37,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13519 conditions, 2683 events. 1548/2683 cut-off events. For 94615/94615 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16301 event pairs, 433 based on Foata normal form. 30/2707 useless extension candidates. Maximal degree in co-relation 13437. Up to 1383 conditions per place. [2024-06-04 14:07:37,471 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 65 changer transitions 8/174 dead transitions. [2024-06-04 14:07:37,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 174 transitions, 2049 flow [2024-06-04 14:07:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 14:07:37,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-04 14:07:37,472 INFO L175 Difference]: Start difference. First operand has 166 places, 141 transitions, 1459 flow. Second operand 9 states and 201 transitions. [2024-06-04 14:07:37,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 174 transitions, 2049 flow [2024-06-04 14:07:37,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 174 transitions, 1932 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:07:37,556 INFO L231 Difference]: Finished difference. Result has 171 places, 142 transitions, 1501 flow [2024-06-04 14:07:37,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1501, PETRI_PLACES=171, PETRI_TRANSITIONS=142} [2024-06-04 14:07:37,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-04 14:07:37,556 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 142 transitions, 1501 flow [2024-06-04 14:07:37,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:37,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:37,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:37,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:07:37,557 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:37,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash 436927028, now seen corresponding path program 4 times [2024-06-04 14:07:37,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:37,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488309321] [2024-06-04 14:07:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:37,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:37,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:37,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488309321] [2024-06-04 14:07:37,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488309321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:37,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:37,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:07:37,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233807091] [2024-06-04 14:07:37,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:37,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:07:37,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:37,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:07:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:07:37,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:37,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 142 transitions, 1501 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:37,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:37,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:37,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:37,879 INFO L124 PetriNetUnfolderBase]: 1262/2174 cut-off events. [2024-06-04 14:07:37,879 INFO L125 PetriNetUnfolderBase]: For 69105/69105 co-relation queries the response was YES. [2024-06-04 14:07:37,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11394 conditions, 2174 events. 1262/2174 cut-off events. For 69105/69105 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12472 event pairs, 273 based on Foata normal form. 6/2171 useless extension candidates. Maximal degree in co-relation 11310. Up to 1415 conditions per place. [2024-06-04 14:07:37,892 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 106 selfloop transitions, 50 changer transitions 0/162 dead transitions. [2024-06-04 14:07:37,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 162 transitions, 1889 flow [2024-06-04 14:07:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:07:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:07:37,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-04 14:07:37,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:07:37,893 INFO L175 Difference]: Start difference. First operand has 171 places, 142 transitions, 1501 flow. Second operand 6 states and 135 transitions. [2024-06-04 14:07:37,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 162 transitions, 1889 flow [2024-06-04 14:07:37,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 162 transitions, 1725 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:37,978 INFO L231 Difference]: Finished difference. Result has 170 places, 142 transitions, 1441 flow [2024-06-04 14:07:37,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1441, PETRI_PLACES=170, PETRI_TRANSITIONS=142} [2024-06-04 14:07:37,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-04 14:07:37,978 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 142 transitions, 1441 flow [2024-06-04 14:07:37,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:37,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:37,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:37,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:07:37,979 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:37,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:37,979 INFO L85 PathProgramCache]: Analyzing trace with hash -422772606, now seen corresponding path program 9 times [2024-06-04 14:07:37,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:37,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441893683] [2024-06-04 14:07:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:37,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:38,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441893683] [2024-06-04 14:07:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441893683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521196011] [2024-06-04 14:07:38,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:38,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:38,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:38,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 142 transitions, 1441 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:38,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:38,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:38,322 INFO L124 PetriNetUnfolderBase]: 1163/2014 cut-off events. [2024-06-04 14:07:38,323 INFO L125 PetriNetUnfolderBase]: For 45546/45546 co-relation queries the response was YES. [2024-06-04 14:07:38,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9741 conditions, 2014 events. 1163/2014 cut-off events. For 45546/45546 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11419 event pairs, 379 based on Foata normal form. 8/2017 useless extension candidates. Maximal degree in co-relation 9657. Up to 1690 conditions per place. [2024-06-04 14:07:38,335 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 52 changer transitions 0/156 dead transitions. [2024-06-04 14:07:38,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 156 transitions, 1809 flow [2024-06-04 14:07:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 14:07:38,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-04 14:07:38,336 INFO L175 Difference]: Start difference. First operand has 170 places, 142 transitions, 1441 flow. Second operand 8 states and 167 transitions. [2024-06-04 14:07:38,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 156 transitions, 1809 flow [2024-06-04 14:07:38,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 156 transitions, 1591 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:38,411 INFO L231 Difference]: Finished difference. Result has 170 places, 143 transitions, 1358 flow [2024-06-04 14:07:38,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=170, PETRI_TRANSITIONS=143} [2024-06-04 14:07:38,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-04 14:07:38,411 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 143 transitions, 1358 flow [2024-06-04 14:07:38,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:38,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:38,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:38,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:07:38,412 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:38,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1817276100, now seen corresponding path program 10 times [2024-06-04 14:07:38,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:38,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564829289] [2024-06-04 14:07:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:38,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:38,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:38,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564829289] [2024-06-04 14:07:38,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564829289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:38,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:38,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:38,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037376224] [2024-06-04 14:07:38,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:38,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:38,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:38,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:38,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 143 transitions, 1358 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:38,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:38,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:38,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:38,741 INFO L124 PetriNetUnfolderBase]: 1178/2051 cut-off events. [2024-06-04 14:07:38,741 INFO L125 PetriNetUnfolderBase]: For 45056/45056 co-relation queries the response was YES. [2024-06-04 14:07:38,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9321 conditions, 2051 events. 1178/2051 cut-off events. For 45056/45056 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11753 event pairs, 376 based on Foata normal form. 8/2054 useless extension candidates. Maximal degree in co-relation 9239. Up to 1607 conditions per place. [2024-06-04 14:07:38,754 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 54 changer transitions 0/161 dead transitions. [2024-06-04 14:07:38,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 161 transitions, 1762 flow [2024-06-04 14:07:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-04 14:07:38,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-04 14:07:38,755 INFO L175 Difference]: Start difference. First operand has 170 places, 143 transitions, 1358 flow. Second operand 8 states and 170 transitions. [2024-06-04 14:07:38,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 161 transitions, 1762 flow [2024-06-04 14:07:38,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 161 transitions, 1641 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:38,856 INFO L231 Difference]: Finished difference. Result has 172 places, 144 transitions, 1377 flow [2024-06-04 14:07:38,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=172, PETRI_TRANSITIONS=144} [2024-06-04 14:07:38,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-04 14:07:38,857 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 144 transitions, 1377 flow [2024-06-04 14:07:38,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:38,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:38,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:38,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:07:38,857 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:38,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2133485176, now seen corresponding path program 11 times [2024-06-04 14:07:38,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:38,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024681635] [2024-06-04 14:07:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:38,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:38,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:38,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024681635] [2024-06-04 14:07:38,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024681635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:38,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:38,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:38,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191218262] [2024-06-04 14:07:38,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:38,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:38,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:39,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:39,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 144 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:39,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:39,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:39,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:39,235 INFO L124 PetriNetUnfolderBase]: 1198/2079 cut-off events. [2024-06-04 14:07:39,235 INFO L125 PetriNetUnfolderBase]: For 45324/45324 co-relation queries the response was YES. [2024-06-04 14:07:39,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9510 conditions, 2079 events. 1198/2079 cut-off events. For 45324/45324 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11897 event pairs, 385 based on Foata normal form. 6/2080 useless extension candidates. Maximal degree in co-relation 9427. Up to 1768 conditions per place. [2024-06-04 14:07:39,247 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 119 selfloop transitions, 34 changer transitions 0/159 dead transitions. [2024-06-04 14:07:39,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 159 transitions, 1749 flow [2024-06-04 14:07:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-04 14:07:39,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-04 14:07:39,248 INFO L175 Difference]: Start difference. First operand has 172 places, 144 transitions, 1377 flow. Second operand 8 states and 164 transitions. [2024-06-04 14:07:39,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 159 transitions, 1749 flow [2024-06-04 14:07:39,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 159 transitions, 1621 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:39,320 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 1351 flow [2024-06-04 14:07:39,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-06-04 14:07:39,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-04 14:07:39,320 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 1351 flow [2024-06-04 14:07:39,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:39,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:39,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:39,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:07:39,321 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:39,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2133605146, now seen corresponding path program 12 times [2024-06-04 14:07:39,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:39,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898768649] [2024-06-04 14:07:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:39,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:39,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898768649] [2024-06-04 14:07:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898768649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:39,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:39,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:39,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908432201] [2024-06-04 14:07:39,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:39,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:39,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:39,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 1351 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:39,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:39,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:39,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:39,649 INFO L124 PetriNetUnfolderBase]: 1218/2117 cut-off events. [2024-06-04 14:07:39,649 INFO L125 PetriNetUnfolderBase]: For 47425/47425 co-relation queries the response was YES. [2024-06-04 14:07:39,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9590 conditions, 2117 events. 1218/2117 cut-off events. For 47425/47425 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12259 event pairs, 378 based on Foata normal form. 6/2118 useless extension candidates. Maximal degree in co-relation 9506. Up to 1547 conditions per place. [2024-06-04 14:07:39,663 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 99 selfloop transitions, 60 changer transitions 0/165 dead transitions. [2024-06-04 14:07:39,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 165 transitions, 1771 flow [2024-06-04 14:07:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 14:07:39,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-04 14:07:39,664 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 1351 flow. Second operand 8 states and 172 transitions. [2024-06-04 14:07:39,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 165 transitions, 1771 flow [2024-06-04 14:07:39,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 165 transitions, 1653 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:39,746 INFO L231 Difference]: Finished difference. Result has 175 places, 146 transitions, 1389 flow [2024-06-04 14:07:39,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=175, PETRI_TRANSITIONS=146} [2024-06-04 14:07:39,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-04 14:07:39,746 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 146 transitions, 1389 flow [2024-06-04 14:07:39,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:39,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:39,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:07:39,747 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:39,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:39,747 INFO L85 PathProgramCache]: Analyzing trace with hash 834469572, now seen corresponding path program 13 times [2024-06-04 14:07:39,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:39,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760638019] [2024-06-04 14:07:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:39,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:39,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760638019] [2024-06-04 14:07:39,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760638019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:39,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:39,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:39,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064911773] [2024-06-04 14:07:39,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:39,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:39,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:39,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:39,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 146 transitions, 1389 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:39,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:39,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:39,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:40,136 INFO L124 PetriNetUnfolderBase]: 1279/2220 cut-off events. [2024-06-04 14:07:40,137 INFO L125 PetriNetUnfolderBase]: For 57668/57668 co-relation queries the response was YES. [2024-06-04 14:07:40,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10559 conditions, 2220 events. 1279/2220 cut-off events. For 57668/57668 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12891 event pairs, 301 based on Foata normal form. 6/2221 useless extension candidates. Maximal degree in co-relation 10475. Up to 1706 conditions per place. [2024-06-04 14:07:40,150 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 114 selfloop transitions, 53 changer transitions 0/173 dead transitions. [2024-06-04 14:07:40,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 1975 flow [2024-06-04 14:07:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-04 14:07:40,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-04 14:07:40,151 INFO L175 Difference]: Start difference. First operand has 175 places, 146 transitions, 1389 flow. Second operand 9 states and 188 transitions. [2024-06-04 14:07:40,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 1975 flow [2024-06-04 14:07:40,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 173 transitions, 1824 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:40,233 INFO L231 Difference]: Finished difference. Result has 177 places, 150 transitions, 1430 flow [2024-06-04 14:07:40,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1430, PETRI_PLACES=177, PETRI_TRANSITIONS=150} [2024-06-04 14:07:40,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-04 14:07:40,233 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 150 transitions, 1430 flow [2024-06-04 14:07:40,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:40,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:40,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:40,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:07:40,233 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:40,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash -82564728, now seen corresponding path program 14 times [2024-06-04 14:07:40,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:40,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232820988] [2024-06-04 14:07:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:40,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:40,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:40,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232820988] [2024-06-04 14:07:40,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232820988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:40,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:40,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:40,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163273579] [2024-06-04 14:07:40,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:40,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:40,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:40,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:40,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 150 transitions, 1430 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:40,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:40,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:40,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:40,602 INFO L124 PetriNetUnfolderBase]: 1266/2193 cut-off events. [2024-06-04 14:07:40,602 INFO L125 PetriNetUnfolderBase]: For 50353/50353 co-relation queries the response was YES. [2024-06-04 14:07:40,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9998 conditions, 2193 events. 1266/2193 cut-off events. For 50353/50353 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12760 event pairs, 291 based on Foata normal form. 6/2194 useless extension candidates. Maximal degree in co-relation 9914. Up to 1772 conditions per place. [2024-06-04 14:07:40,616 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 50 changer transitions 0/168 dead transitions. [2024-06-04 14:07:40,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 168 transitions, 1816 flow [2024-06-04 14:07:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-04 14:07:40,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-04 14:07:40,617 INFO L175 Difference]: Start difference. First operand has 177 places, 150 transitions, 1430 flow. Second operand 8 states and 169 transitions. [2024-06-04 14:07:40,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 168 transitions, 1816 flow [2024-06-04 14:07:40,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 168 transitions, 1697 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 14:07:40,697 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1415 flow [2024-06-04 14:07:40,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1415, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-04 14:07:40,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-04 14:07:40,697 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1415 flow [2024-06-04 14:07:40,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:40,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:40,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:40,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:07:40,698 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:40,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1994765280, now seen corresponding path program 15 times [2024-06-04 14:07:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481562622] [2024-06-04 14:07:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:40,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:40,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481562622] [2024-06-04 14:07:40,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481562622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:40,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:40,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:40,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723641491] [2024-06-04 14:07:40,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:40,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:40,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:40,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:40,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1415 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:40,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:40,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:40,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:41,076 INFO L124 PetriNetUnfolderBase]: 1380/2377 cut-off events. [2024-06-04 14:07:41,076 INFO L125 PetriNetUnfolderBase]: For 73421/73421 co-relation queries the response was YES. [2024-06-04 14:07:41,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 2377 events. 1380/2377 cut-off events. For 73421/73421 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13975 event pairs, 411 based on Foata normal form. 6/2378 useless extension candidates. Maximal degree in co-relation 11280. Up to 1240 conditions per place. [2024-06-04 14:07:41,092 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 76 changer transitions 0/173 dead transitions. [2024-06-04 14:07:41,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 173 transitions, 1933 flow [2024-06-04 14:07:41,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 14:07:41,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-04 14:07:41,093 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1415 flow. Second operand 8 states and 174 transitions. [2024-06-04 14:07:41,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 173 transitions, 1933 flow [2024-06-04 14:07:41,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 173 transitions, 1807 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:41,226 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1445 flow [2024-06-04 14:07:41,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-04 14:07:41,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-04 14:07:41,226 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1445 flow [2024-06-04 14:07:41,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:41,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:41,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:41,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:07:41,227 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:41,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1417345264, now seen corresponding path program 1 times [2024-06-04 14:07:41,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:41,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21557249] [2024-06-04 14:07:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:41,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:41,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21557249] [2024-06-04 14:07:41,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21557249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:41,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:41,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526976226] [2024-06-04 14:07:41,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:41,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:41,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:41,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1445 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:41,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:41,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:41,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:41,671 INFO L124 PetriNetUnfolderBase]: 1582/2757 cut-off events. [2024-06-04 14:07:41,671 INFO L125 PetriNetUnfolderBase]: For 120138/120139 co-relation queries the response was YES. [2024-06-04 14:07:41,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13861 conditions, 2757 events. 1582/2757 cut-off events. For 120138/120139 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 16993 event pairs, 324 based on Foata normal form. 19/2772 useless extension candidates. Maximal degree in co-relation 13775. Up to 1872 conditions per place. [2024-06-04 14:07:41,689 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 27 changer transitions 11/185 dead transitions. [2024-06-04 14:07:41,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 185 transitions, 2046 flow [2024-06-04 14:07:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 14:07:41,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-04 14:07:41,690 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1445 flow. Second operand 7 states and 164 transitions. [2024-06-04 14:07:41,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 185 transitions, 2046 flow [2024-06-04 14:07:41,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 185 transitions, 1802 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:41,836 INFO L231 Difference]: Finished difference. Result has 181 places, 150 transitions, 1278 flow [2024-06-04 14:07:41,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1278, PETRI_PLACES=181, PETRI_TRANSITIONS=150} [2024-06-04 14:07:41,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-04 14:07:41,837 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 150 transitions, 1278 flow [2024-06-04 14:07:41,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:41,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:41,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:41,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:07:41,837 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:41,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1502548144, now seen corresponding path program 2 times [2024-06-04 14:07:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:41,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693473916] [2024-06-04 14:07:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:41,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:41,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:41,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693473916] [2024-06-04 14:07:41,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693473916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:41,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624712457] [2024-06-04 14:07:41,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:41,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:42,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:42,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 150 transitions, 1278 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:42,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:42,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:42,246 INFO L124 PetriNetUnfolderBase]: 1371/2402 cut-off events. [2024-06-04 14:07:42,246 INFO L125 PetriNetUnfolderBase]: For 82343/82344 co-relation queries the response was YES. [2024-06-04 14:07:42,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 2402 events. 1371/2402 cut-off events. For 82343/82344 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14421 event pairs, 306 based on Foata normal form. 19/2417 useless extension candidates. Maximal degree in co-relation 10508. Up to 1667 conditions per place. [2024-06-04 14:07:42,260 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 140 selfloop transitions, 22 changer transitions 10/178 dead transitions. [2024-06-04 14:07:42,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 178 transitions, 1824 flow [2024-06-04 14:07:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 14:07:42,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 14:07:42,261 INFO L175 Difference]: Start difference. First operand has 181 places, 150 transitions, 1278 flow. Second operand 7 states and 158 transitions. [2024-06-04 14:07:42,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 178 transitions, 1824 flow [2024-06-04 14:07:42,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 178 transitions, 1778 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:42,380 INFO L231 Difference]: Finished difference. Result has 180 places, 146 transitions, 1243 flow [2024-06-04 14:07:42,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1243, PETRI_PLACES=180, PETRI_TRANSITIONS=146} [2024-06-04 14:07:42,380 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-04 14:07:42,380 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 146 transitions, 1243 flow [2024-06-04 14:07:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:42,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:42,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:42,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:07:42,381 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:42,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 790980898, now seen corresponding path program 1 times [2024-06-04 14:07:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:42,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343209778] [2024-06-04 14:07:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:42,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:42,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343209778] [2024-06-04 14:07:42,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343209778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:42,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:42,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:42,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904536280] [2024-06-04 14:07:42,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:42,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:42,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:42,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:42,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:42,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:42,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 146 transitions, 1243 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:42,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:42,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:42,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:42,773 INFO L124 PetriNetUnfolderBase]: 1335/2334 cut-off events. [2024-06-04 14:07:42,773 INFO L125 PetriNetUnfolderBase]: For 79149/79150 co-relation queries the response was YES. [2024-06-04 14:07:42,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 2334 events. 1335/2334 cut-off events. For 79149/79150 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 13891 event pairs, 237 based on Foata normal form. 19/2349 useless extension candidates. Maximal degree in co-relation 10183. Up to 1667 conditions per place. [2024-06-04 14:07:42,787 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 138 selfloop transitions, 23 changer transitions 8/175 dead transitions. [2024-06-04 14:07:42,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 1791 flow [2024-06-04 14:07:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 14:07:42,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-04 14:07:42,788 INFO L175 Difference]: Start difference. First operand has 180 places, 146 transitions, 1243 flow. Second operand 7 states and 159 transitions. [2024-06-04 14:07:42,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 1791 flow [2024-06-04 14:07:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 175 transitions, 1737 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:42,908 INFO L231 Difference]: Finished difference. Result has 176 places, 144 transitions, 1223 flow [2024-06-04 14:07:42,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1223, PETRI_PLACES=176, PETRI_TRANSITIONS=144} [2024-06-04 14:07:42,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-04 14:07:42,909 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 144 transitions, 1223 flow [2024-06-04 14:07:42,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:42,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:42,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:42,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:07:42,909 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:42,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:42,909 INFO L85 PathProgramCache]: Analyzing trace with hash 790986478, now seen corresponding path program 2 times [2024-06-04 14:07:42,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:42,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019622114] [2024-06-04 14:07:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:42,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:42,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:42,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019622114] [2024-06-04 14:07:42,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019622114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:42,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:42,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:42,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703301843] [2024-06-04 14:07:42,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:42,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:43,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:43,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 144 transitions, 1223 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:43,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:43,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:43,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:43,285 INFO L124 PetriNetUnfolderBase]: 1230/2147 cut-off events. [2024-06-04 14:07:43,285 INFO L125 PetriNetUnfolderBase]: For 57126/57127 co-relation queries the response was YES. [2024-06-04 14:07:43,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8797 conditions, 2147 events. 1230/2147 cut-off events. For 57126/57127 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12557 event pairs, 219 based on Foata normal form. 19/2162 useless extension candidates. Maximal degree in co-relation 8714. Up to 1667 conditions per place. [2024-06-04 14:07:43,298 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 135 selfloop transitions, 20 changer transitions 10/171 dead transitions. [2024-06-04 14:07:43,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 171 transitions, 1653 flow [2024-06-04 14:07:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:07:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:07:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-04 14:07:43,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-04 14:07:43,299 INFO L175 Difference]: Start difference. First operand has 176 places, 144 transitions, 1223 flow. Second operand 7 states and 157 transitions. [2024-06-04 14:07:43,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 171 transitions, 1653 flow [2024-06-04 14:07:43,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 171 transitions, 1603 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:43,396 INFO L231 Difference]: Finished difference. Result has 175 places, 140 transitions, 1171 flow [2024-06-04 14:07:43,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1171, PETRI_PLACES=175, PETRI_TRANSITIONS=140} [2024-06-04 14:07:43,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-04 14:07:43,396 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 140 transitions, 1171 flow [2024-06-04 14:07:43,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:43,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:43,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:43,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:07:43,397 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:43,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash 819070702, now seen corresponding path program 3 times [2024-06-04 14:07:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:43,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632956928] [2024-06-04 14:07:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:43,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:43,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632956928] [2024-06-04 14:07:43,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632956928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:43,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:43,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:43,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572975865] [2024-06-04 14:07:43,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:43,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:43,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:43,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 140 transitions, 1171 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:43,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:43,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:43,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:43,811 INFO L124 PetriNetUnfolderBase]: 1283/2244 cut-off events. [2024-06-04 14:07:43,811 INFO L125 PetriNetUnfolderBase]: For 79192/79193 co-relation queries the response was YES. [2024-06-04 14:07:43,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9897 conditions, 2244 events. 1283/2244 cut-off events. For 79192/79193 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13251 event pairs, 239 based on Foata normal form. 19/2260 useless extension candidates. Maximal degree in co-relation 9814. Up to 1579 conditions per place. [2024-06-04 14:07:43,824 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 24 changer transitions 8/179 dead transitions. [2024-06-04 14:07:43,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 179 transitions, 1763 flow [2024-06-04 14:07:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-04 14:07:43,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-04 14:07:43,825 INFO L175 Difference]: Start difference. First operand has 175 places, 140 transitions, 1171 flow. Second operand 10 states and 211 transitions. [2024-06-04 14:07:43,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 179 transitions, 1763 flow [2024-06-04 14:07:43,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 1691 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:43,929 INFO L231 Difference]: Finished difference. Result has 176 places, 138 transitions, 1135 flow [2024-06-04 14:07:43,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1135, PETRI_PLACES=176, PETRI_TRANSITIONS=138} [2024-06-04 14:07:43,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-04 14:07:43,930 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 138 transitions, 1135 flow [2024-06-04 14:07:43,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:43,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:43,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:07:43,931 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:43,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash 819065122, now seen corresponding path program 4 times [2024-06-04 14:07:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:43,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368347929] [2024-06-04 14:07:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:43,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:44,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:44,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368347929] [2024-06-04 14:07:44,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368347929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:44,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:44,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:44,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190079143] [2024-06-04 14:07:44,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:44,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:44,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:44,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 138 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:44,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:44,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:44,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:44,306 INFO L124 PetriNetUnfolderBase]: 1178/2057 cut-off events. [2024-06-04 14:07:44,306 INFO L125 PetriNetUnfolderBase]: For 56995/56996 co-relation queries the response was YES. [2024-06-04 14:07:44,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 2057 events. 1178/2057 cut-off events. For 56995/56996 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 227 based on Foata normal form. 19/2073 useless extension candidates. Maximal degree in co-relation 8366. Up to 1579 conditions per place. [2024-06-04 14:07:44,318 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 21 changer transitions 12/168 dead transitions. [2024-06-04 14:07:44,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 168 transitions, 1573 flow [2024-06-04 14:07:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 14:07:44,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-04 14:07:44,319 INFO L175 Difference]: Start difference. First operand has 176 places, 138 transitions, 1135 flow. Second operand 8 states and 174 transitions. [2024-06-04 14:07:44,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 168 transitions, 1573 flow [2024-06-04 14:07:44,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 168 transitions, 1498 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:44,408 INFO L231 Difference]: Finished difference. Result has 172 places, 136 transitions, 1091 flow [2024-06-04 14:07:44,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1091, PETRI_PLACES=172, PETRI_TRANSITIONS=136} [2024-06-04 14:07:44,409 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-04 14:07:44,409 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 136 transitions, 1091 flow [2024-06-04 14:07:44,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:44,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:44,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:44,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:07:44,409 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:44,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash 815346052, now seen corresponding path program 5 times [2024-06-04 14:07:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:44,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031377896] [2024-06-04 14:07:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:44,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031377896] [2024-06-04 14:07:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031377896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:44,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:44,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946259772] [2024-06-04 14:07:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:44,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:44,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 136 transitions, 1091 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:44,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:44,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:44,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:44,763 INFO L124 PetriNetUnfolderBase]: 1154/2005 cut-off events. [2024-06-04 14:07:44,763 INFO L125 PetriNetUnfolderBase]: For 56873/56874 co-relation queries the response was YES. [2024-06-04 14:07:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8193 conditions, 2005 events. 1154/2005 cut-off events. For 56873/56874 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11480 event pairs, 246 based on Foata normal form. 19/2021 useless extension candidates. Maximal degree in co-relation 8112. Up to 1511 conditions per place. [2024-06-04 14:07:44,775 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 123 selfloop transitions, 17 changer transitions 20/166 dead transitions. [2024-06-04 14:07:44,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 166 transitions, 1525 flow [2024-06-04 14:07:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 14:07:44,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-04 14:07:44,776 INFO L175 Difference]: Start difference. First operand has 172 places, 136 transitions, 1091 flow. Second operand 8 states and 172 transitions. [2024-06-04 14:07:44,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 166 transitions, 1525 flow [2024-06-04 14:07:44,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 166 transitions, 1479 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:44,869 INFO L231 Difference]: Finished difference. Result has 169 places, 130 transitions, 1028 flow [2024-06-04 14:07:44,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=169, PETRI_TRANSITIONS=130} [2024-06-04 14:07:44,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-04 14:07:44,869 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 130 transitions, 1028 flow [2024-06-04 14:07:44,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:44,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:44,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:44,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:07:44,870 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:44,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2039329870, now seen corresponding path program 3 times [2024-06-04 14:07:44,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:44,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964821530] [2024-06-04 14:07:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:44,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:44,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964821530] [2024-06-04 14:07:44,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964821530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:44,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:44,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092025146] [2024-06-04 14:07:44,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:44,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:44,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:44,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:44,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:45,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:45,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 130 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:45,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:45,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:45,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:45,366 INFO L124 PetriNetUnfolderBase]: 1327/2298 cut-off events. [2024-06-04 14:07:45,367 INFO L125 PetriNetUnfolderBase]: For 112501/112502 co-relation queries the response was YES. [2024-06-04 14:07:45,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11478 conditions, 2298 events. 1327/2298 cut-off events. For 112501/112502 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13713 event pairs, 418 based on Foata normal form. 19/2313 useless extension candidates. Maximal degree in co-relation 11398. Up to 1268 conditions per place. [2024-06-04 14:07:45,378 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 43 changer transitions 11/178 dead transitions. [2024-06-04 14:07:45,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 178 transitions, 1736 flow [2024-06-04 14:07:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:07:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:07:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-04 14:07:45,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-04 14:07:45,378 INFO L175 Difference]: Start difference. First operand has 169 places, 130 transitions, 1028 flow. Second operand 13 states and 273 transitions. [2024-06-04 14:07:45,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 178 transitions, 1736 flow [2024-06-04 14:07:45,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 178 transitions, 1629 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-04 14:07:45,530 INFO L231 Difference]: Finished difference. Result has 165 places, 128 transitions, 1008 flow [2024-06-04 14:07:45,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1008, PETRI_PLACES=165, PETRI_TRANSITIONS=128} [2024-06-04 14:07:45,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-04 14:07:45,530 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 128 transitions, 1008 flow [2024-06-04 14:07:45,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:45,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:45,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:45,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:07:45,531 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:45,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:45,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2039628400, now seen corresponding path program 4 times [2024-06-04 14:07:45,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:45,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979442386] [2024-06-04 14:07:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:45,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979442386] [2024-06-04 14:07:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979442386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:45,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234480223] [2024-06-04 14:07:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:45,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:45,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:45,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 128 transitions, 1008 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:45,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:45,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:45,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:45,979 INFO L124 PetriNetUnfolderBase]: 1390/2399 cut-off events. [2024-06-04 14:07:45,979 INFO L125 PetriNetUnfolderBase]: For 129555/129556 co-relation queries the response was YES. [2024-06-04 14:07:45,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2399 events. 1390/2399 cut-off events. For 129555/129556 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14453 event pairs, 498 based on Foata normal form. 19/2414 useless extension candidates. Maximal degree in co-relation 12647. Up to 1268 conditions per place. [2024-06-04 14:07:45,993 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 41 changer transitions 9/173 dead transitions. [2024-06-04 14:07:45,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 1690 flow [2024-06-04 14:07:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:07:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:07:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-04 14:07:45,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-04 14:07:45,996 INFO L175 Difference]: Start difference. First operand has 165 places, 128 transitions, 1008 flow. Second operand 13 states and 270 transitions. [2024-06-04 14:07:45,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 1690 flow [2024-06-04 14:07:46,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 173 transitions, 1594 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-04 14:07:46,096 INFO L231 Difference]: Finished difference. Result has 164 places, 125 transitions, 982 flow [2024-06-04 14:07:46,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=982, PETRI_PLACES=164, PETRI_TRANSITIONS=125} [2024-06-04 14:07:46,097 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-04 14:07:46,097 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 125 transitions, 982 flow [2024-06-04 14:07:46,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:46,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:46,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:46,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:07:46,097 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:46,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash 348325792, now seen corresponding path program 5 times [2024-06-04 14:07:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877966163] [2024-06-04 14:07:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:46,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:46,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877966163] [2024-06-04 14:07:46,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877966163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:46,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:46,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:46,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311819170] [2024-06-04 14:07:46,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:46,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:46,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:46,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 125 transitions, 982 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:46,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:46,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:46,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:46,513 INFO L124 PetriNetUnfolderBase]: 1264/2181 cut-off events. [2024-06-04 14:07:46,513 INFO L125 PetriNetUnfolderBase]: For 105377/105378 co-relation queries the response was YES. [2024-06-04 14:07:46,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10856 conditions, 2181 events. 1264/2181 cut-off events. For 105377/105378 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12808 event pairs, 482 based on Foata normal form. 25/2202 useless extension candidates. Maximal degree in co-relation 10782. Up to 1502 conditions per place. [2024-06-04 14:07:46,527 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 38 changer transitions 13/163 dead transitions. [2024-06-04 14:07:46,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 163 transitions, 1520 flow [2024-06-04 14:07:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:07:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:07:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-04 14:07:46,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-04 14:07:46,534 INFO L175 Difference]: Start difference. First operand has 164 places, 125 transitions, 982 flow. Second operand 12 states and 247 transitions. [2024-06-04 14:07:46,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 163 transitions, 1520 flow [2024-06-04 14:07:46,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 163 transitions, 1427 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-04 14:07:46,614 INFO L231 Difference]: Finished difference. Result has 160 places, 122 transitions, 946 flow [2024-06-04 14:07:46,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=946, PETRI_PLACES=160, PETRI_TRANSITIONS=122} [2024-06-04 14:07:46,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-04 14:07:46,615 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 122 transitions, 946 flow [2024-06-04 14:07:46,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:46,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:46,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:07:46,615 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:46,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 154446832, now seen corresponding path program 6 times [2024-06-04 14:07:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:46,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240298714] [2024-06-04 14:07:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:46,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:46,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240298714] [2024-06-04 14:07:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240298714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:46,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341350638] [2024-06-04 14:07:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:46,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:46,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:46,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:46,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 122 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:46,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:46,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:46,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:47,039 INFO L124 PetriNetUnfolderBase]: 1204/2069 cut-off events. [2024-06-04 14:07:47,039 INFO L125 PetriNetUnfolderBase]: For 98730/98731 co-relation queries the response was YES. [2024-06-04 14:07:47,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10306 conditions, 2069 events. 1204/2069 cut-off events. For 98730/98731 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11976 event pairs, 508 based on Foata normal form. 27/2092 useless extension candidates. Maximal degree in co-relation 10234. Up to 1713 conditions per place. [2024-06-04 14:07:47,051 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 94 selfloop transitions, 33 changer transitions 17/150 dead transitions. [2024-06-04 14:07:47,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 150 transitions, 1322 flow [2024-06-04 14:07:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:07:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:07:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-04 14:07:47,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-06-04 14:07:47,052 INFO L175 Difference]: Start difference. First operand has 160 places, 122 transitions, 946 flow. Second operand 12 states and 237 transitions. [2024-06-04 14:07:47,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 150 transitions, 1322 flow [2024-06-04 14:07:47,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 150 transitions, 1248 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:47,121 INFO L231 Difference]: Finished difference. Result has 158 places, 117 transitions, 906 flow [2024-06-04 14:07:47,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=906, PETRI_PLACES=158, PETRI_TRANSITIONS=117} [2024-06-04 14:07:47,121 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-04 14:07:47,122 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 117 transitions, 906 flow [2024-06-04 14:07:47,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:47,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:47,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:47,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:07:47,122 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:47,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1319196880, now seen corresponding path program 7 times [2024-06-04 14:07:47,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:47,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559466690] [2024-06-04 14:07:47,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:47,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:47,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:47,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559466690] [2024-06-04 14:07:47,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559466690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:47,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:47,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:47,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946475000] [2024-06-04 14:07:47,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:47,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:47,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:47,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:47,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 117 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:47,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:47,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:47,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:47,483 INFO L124 PetriNetUnfolderBase]: 1071/1846 cut-off events. [2024-06-04 14:07:47,483 INFO L125 PetriNetUnfolderBase]: For 70349/70350 co-relation queries the response was YES. [2024-06-04 14:07:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8462 conditions, 1846 events. 1071/1846 cut-off events. For 70349/70350 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10431 event pairs, 384 based on Foata normal form. 25/1867 useless extension candidates. Maximal degree in co-relation 8391. Up to 1268 conditions per place. [2024-06-04 14:07:47,493 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 101 selfloop transitions, 31 changer transitions 10/148 dead transitions. [2024-06-04 14:07:47,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 148 transitions, 1390 flow [2024-06-04 14:07:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-04 14:07:47,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-04 14:07:47,494 INFO L175 Difference]: Start difference. First operand has 158 places, 117 transitions, 906 flow. Second operand 11 states and 223 transitions. [2024-06-04 14:07:47,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 148 transitions, 1390 flow [2024-06-04 14:07:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 1312 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:47,580 INFO L231 Difference]: Finished difference. Result has 153 places, 114 transitions, 874 flow [2024-06-04 14:07:47,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=874, PETRI_PLACES=153, PETRI_TRANSITIONS=114} [2024-06-04 14:07:47,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-04 14:07:47,581 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 114 transitions, 874 flow [2024-06-04 14:07:47,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:47,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:47,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:47,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:07:47,582 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:47,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -232150688, now seen corresponding path program 8 times [2024-06-04 14:07:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:47,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271195357] [2024-06-04 14:07:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:47,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:47,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271195357] [2024-06-04 14:07:47,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271195357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:47,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:47,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:47,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513862782] [2024-06-04 14:07:47,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:47,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:47,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:47,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:47,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 114 transitions, 874 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:47,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:47,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:47,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:47,935 INFO L124 PetriNetUnfolderBase]: 920/1577 cut-off events. [2024-06-04 14:07:47,935 INFO L125 PetriNetUnfolderBase]: For 44711/44712 co-relation queries the response was YES. [2024-06-04 14:07:47,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6446 conditions, 1577 events. 920/1577 cut-off events. For 44711/44712 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8554 event pairs, 329 based on Foata normal form. 27/1600 useless extension candidates. Maximal degree in co-relation 6377. Up to 1268 conditions per place. [2024-06-04 14:07:47,942 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 25 changer transitions 19/137 dead transitions. [2024-06-04 14:07:47,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 137 transitions, 1212 flow [2024-06-04 14:07:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-04 14:07:47,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-06-04 14:07:47,943 INFO L175 Difference]: Start difference. First operand has 153 places, 114 transitions, 874 flow. Second operand 10 states and 199 transitions. [2024-06-04 14:07:47,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 137 transitions, 1212 flow [2024-06-04 14:07:47,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 137 transitions, 1149 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:47,990 INFO L231 Difference]: Finished difference. Result has 150 places, 108 transitions, 820 flow [2024-06-04 14:07:47,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=820, PETRI_PLACES=150, PETRI_TRANSITIONS=108} [2024-06-04 14:07:47,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-04 14:07:47,990 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 108 transitions, 820 flow [2024-06-04 14:07:47,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:47,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:47,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:47,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:07:47,990 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:47,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2007476048, now seen corresponding path program 9 times [2024-06-04 14:07:47,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:47,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821890457] [2024-06-04 14:07:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:48,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821890457] [2024-06-04 14:07:48,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821890457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:48,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:48,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:48,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838650954] [2024-06-04 14:07:48,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:48,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:48,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:48,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:48,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 108 transitions, 820 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:48,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:48,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:48,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:48,409 INFO L124 PetriNetUnfolderBase]: 1088/1888 cut-off events. [2024-06-04 14:07:48,409 INFO L125 PetriNetUnfolderBase]: For 70272/70273 co-relation queries the response was YES. [2024-06-04 14:07:48,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8994 conditions, 1888 events. 1088/1888 cut-off events. For 70272/70273 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 10751 event pairs, 329 based on Foata normal form. 19/1903 useless extension candidates. Maximal degree in co-relation 8926. Up to 1050 conditions per place. [2024-06-04 14:07:48,419 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 29 changer transitions 15/155 dead transitions. [2024-06-04 14:07:48,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 155 transitions, 1448 flow [2024-06-04 14:07:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:07:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:07:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-04 14:07:48,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-04 14:07:48,419 INFO L175 Difference]: Start difference. First operand has 150 places, 108 transitions, 820 flow. Second operand 12 states and 249 transitions. [2024-06-04 14:07:48,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 155 transitions, 1448 flow [2024-06-04 14:07:48,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 155 transitions, 1374 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:48,483 INFO L231 Difference]: Finished difference. Result has 144 places, 106 transitions, 809 flow [2024-06-04 14:07:48,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=809, PETRI_PLACES=144, PETRI_TRANSITIONS=106} [2024-06-04 14:07:48,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-04 14:07:48,484 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 106 transitions, 809 flow [2024-06-04 14:07:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:48,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:48,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:48,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:07:48,484 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:48,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1073247804, now seen corresponding path program 10 times [2024-06-04 14:07:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078040859] [2024-06-04 14:07:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:48,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078040859] [2024-06-04 14:07:48,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078040859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:48,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:48,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:48,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104030092] [2024-06-04 14:07:48,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:48,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:48,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:48,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:48,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 106 transitions, 809 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:48,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:48,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:48,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:48,857 INFO L124 PetriNetUnfolderBase]: 956/1650 cut-off events. [2024-06-04 14:07:48,857 INFO L125 PetriNetUnfolderBase]: For 48772/48773 co-relation queries the response was YES. [2024-06-04 14:07:48,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7457 conditions, 1650 events. 956/1650 cut-off events. For 48772/48773 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9153 event pairs, 317 based on Foata normal form. 19/1665 useless extension candidates. Maximal degree in co-relation 7392. Up to 1050 conditions per place. [2024-06-04 14:07:48,864 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 26 changer transitions 18/139 dead transitions. [2024-06-04 14:07:48,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 1267 flow [2024-06-04 14:07:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 14:07:48,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-04 14:07:48,865 INFO L175 Difference]: Start difference. First operand has 144 places, 106 transitions, 809 flow. Second operand 10 states and 207 transitions. [2024-06-04 14:07:48,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 1267 flow [2024-06-04 14:07:48,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 139 transitions, 1202 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:48,903 INFO L231 Difference]: Finished difference. Result has 141 places, 103 transitions, 785 flow [2024-06-04 14:07:48,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=785, PETRI_PLACES=141, PETRI_TRANSITIONS=103} [2024-06-04 14:07:48,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-04 14:07:48,903 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 103 transitions, 785 flow [2024-06-04 14:07:48,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:48,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:48,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:48,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:07:48,904 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:48,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1063070814, now seen corresponding path program 11 times [2024-06-04 14:07:48,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:48,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73383194] [2024-06-04 14:07:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:48,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73383194] [2024-06-04 14:07:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73383194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:48,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:48,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386555133] [2024-06-04 14:07:48,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:49,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:49,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 103 transitions, 785 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:49,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:49,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:49,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:49,229 INFO L124 PetriNetUnfolderBase]: 1093/1886 cut-off events. [2024-06-04 14:07:49,229 INFO L125 PetriNetUnfolderBase]: For 61573/61573 co-relation queries the response was YES. [2024-06-04 14:07:49,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8975 conditions, 1886 events. 1093/1886 cut-off events. For 61573/61573 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 10948 event pairs, 316 based on Foata normal form. 18/1899 useless extension candidates. Maximal degree in co-relation 8911. Up to 849 conditions per place. [2024-06-04 14:07:49,239 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 27 changer transitions 22/133 dead transitions. [2024-06-04 14:07:49,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 133 transitions, 1236 flow [2024-06-04 14:07:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-04 14:07:49,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-04 14:07:49,240 INFO L175 Difference]: Start difference. First operand has 141 places, 103 transitions, 785 flow. Second operand 8 states and 172 transitions. [2024-06-04 14:07:49,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 133 transitions, 1236 flow [2024-06-04 14:07:49,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 133 transitions, 1172 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:49,284 INFO L231 Difference]: Finished difference. Result has 134 places, 98 transitions, 747 flow [2024-06-04 14:07:49,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=747, PETRI_PLACES=134, PETRI_TRANSITIONS=98} [2024-06-04 14:07:49,285 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-04 14:07:49,285 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 98 transitions, 747 flow [2024-06-04 14:07:49,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:49,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:49,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:49,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:07:49,285 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:49,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1729188270, now seen corresponding path program 12 times [2024-06-04 14:07:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494982391] [2024-06-04 14:07:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:49,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:49,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494982391] [2024-06-04 14:07:49,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494982391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:49,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:49,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:49,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423448545] [2024-06-04 14:07:49,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:49,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:49,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:49,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:49,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 98 transitions, 747 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:49,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:49,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:49,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:49,633 INFO L124 PetriNetUnfolderBase]: 951/1623 cut-off events. [2024-06-04 14:07:49,633 INFO L125 PetriNetUnfolderBase]: For 46485/46485 co-relation queries the response was YES. [2024-06-04 14:07:49,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7275 conditions, 1623 events. 951/1623 cut-off events. For 46485/46485 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9028 event pairs, 396 based on Foata normal form. 26/1647 useless extension candidates. Maximal degree in co-relation 7213. Up to 1337 conditions per place. [2024-06-04 14:07:49,640 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 71 selfloop transitions, 23 changer transitions 12/112 dead transitions. [2024-06-04 14:07:49,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 112 transitions, 1011 flow [2024-06-04 14:07:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:07:49,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725 [2024-06-04 14:07:49,641 INFO L175 Difference]: Start difference. First operand has 134 places, 98 transitions, 747 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:07:49,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 112 transitions, 1011 flow [2024-06-04 14:07:49,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 112 transitions, 944 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:49,665 INFO L231 Difference]: Finished difference. Result has 127 places, 94 transitions, 701 flow [2024-06-04 14:07:49,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=701, PETRI_PLACES=127, PETRI_TRANSITIONS=94} [2024-06-04 14:07:49,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-04 14:07:49,665 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 94 transitions, 701 flow [2024-06-04 14:07:49,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:49,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:49,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:49,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:07:49,666 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:49,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:49,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1784824960, now seen corresponding path program 6 times [2024-06-04 14:07:49,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:49,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142470028] [2024-06-04 14:07:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:49,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:49,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142470028] [2024-06-04 14:07:49,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142470028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:49,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:49,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:49,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615027197] [2024-06-04 14:07:49,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:49,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:49,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:49,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:49,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 94 transitions, 701 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:49,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:49,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:49,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:49,993 INFO L124 PetriNetUnfolderBase]: 990/1694 cut-off events. [2024-06-04 14:07:49,993 INFO L125 PetriNetUnfolderBase]: For 43451/43451 co-relation queries the response was YES. [2024-06-04 14:07:49,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1694 events. 990/1694 cut-off events. For 43451/43451 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9582 event pairs, 302 based on Foata normal form. 18/1710 useless extension candidates. Maximal degree in co-relation 7827. Up to 826 conditions per place. [2024-06-04 14:07:50,001 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 80 selfloop transitions, 29 changer transitions 8/123 dead transitions. [2024-06-04 14:07:50,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 123 transitions, 1176 flow [2024-06-04 14:07:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-04 14:07:50,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-04 14:07:50,001 INFO L175 Difference]: Start difference. First operand has 127 places, 94 transitions, 701 flow. Second operand 11 states and 217 transitions. [2024-06-04 14:07:50,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 123 transitions, 1176 flow [2024-06-04 14:07:50,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 123 transitions, 1118 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:50,026 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 721 flow [2024-06-04 14:07:50,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=721, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2024-06-04 14:07:50,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-04 14:07:50,027 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 721 flow [2024-06-04 14:07:50,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:50,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:50,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:07:50,027 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:50,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1779266350, now seen corresponding path program 7 times [2024-06-04 14:07:50,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:50,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75667888] [2024-06-04 14:07:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:50,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75667888] [2024-06-04 14:07:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75667888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:50,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:50,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73494853] [2024-06-04 14:07:50,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:50,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:50,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:50,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 721 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:50,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:50,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:50,415 INFO L124 PetriNetUnfolderBase]: 1067/1835 cut-off events. [2024-06-04 14:07:50,416 INFO L125 PetriNetUnfolderBase]: For 50833/50833 co-relation queries the response was YES. [2024-06-04 14:07:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8868 conditions, 1835 events. 1067/1835 cut-off events. For 50833/50833 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10659 event pairs, 485 based on Foata normal form. 24/1857 useless extension candidates. Maximal degree in co-relation 8811. Up to 1299 conditions per place. [2024-06-04 14:07:50,425 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 20 changer transitions 12/114 dead transitions. [2024-06-04 14:07:50,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 114 transitions, 1083 flow [2024-06-04 14:07:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 14:07:50,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825 [2024-06-04 14:07:50,426 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 721 flow. Second operand 10 states and 193 transitions. [2024-06-04 14:07:50,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 114 transitions, 1083 flow [2024-06-04 14:07:50,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 1029 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:50,452 INFO L231 Difference]: Finished difference. Result has 125 places, 89 transitions, 673 flow [2024-06-04 14:07:50,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=673, PETRI_PLACES=125, PETRI_TRANSITIONS=89} [2024-06-04 14:07:50,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-04 14:07:50,453 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 89 transitions, 673 flow [2024-06-04 14:07:50,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:50,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:07:50,453 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1784830540, now seen corresponding path program 8 times [2024-06-04 14:07:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:50,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383177532] [2024-06-04 14:07:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:50,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:50,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383177532] [2024-06-04 14:07:50,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383177532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:50,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:50,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:50,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763512209] [2024-06-04 14:07:50,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:50,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:50,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:50,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:50,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 89 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:50,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:50,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:50,798 INFO L124 PetriNetUnfolderBase]: 933/1601 cut-off events. [2024-06-04 14:07:50,798 INFO L125 PetriNetUnfolderBase]: For 40809/40809 co-relation queries the response was YES. [2024-06-04 14:07:50,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7515 conditions, 1601 events. 933/1601 cut-off events. For 40809/40809 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 8983 event pairs, 296 based on Foata normal form. 18/1617 useless extension candidates. Maximal degree in co-relation 7459. Up to 826 conditions per place. [2024-06-04 14:07:50,807 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 23 changer transitions 9/116 dead transitions. [2024-06-04 14:07:50,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 116 transitions, 1123 flow [2024-06-04 14:07:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-04 14:07:50,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975 [2024-06-04 14:07:50,807 INFO L175 Difference]: Start difference. First operand has 125 places, 89 transitions, 673 flow. Second operand 10 states and 199 transitions. [2024-06-04 14:07:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 116 transitions, 1123 flow [2024-06-04 14:07:50,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 116 transitions, 1068 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:50,828 INFO L231 Difference]: Finished difference. Result has 122 places, 86 transitions, 652 flow [2024-06-04 14:07:50,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=652, PETRI_PLACES=122, PETRI_TRANSITIONS=86} [2024-06-04 14:07:50,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-04 14:07:50,828 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 86 transitions, 652 flow [2024-06-04 14:07:50,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:50,829 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, 1, 1] [2024-06-04 14:07:50,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:07:50,829 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:50,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1773545920, now seen corresponding path program 9 times [2024-06-04 14:07:50,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:50,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747531034] [2024-06-04 14:07:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:50,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:50,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:50,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747531034] [2024-06-04 14:07:50,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747531034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:50,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:50,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866632057] [2024-06-04 14:07:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:50,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:50,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:50,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 86 transitions, 652 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:50,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:50,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:50,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:51,160 INFO L124 PetriNetUnfolderBase]: 808/1384 cut-off events. [2024-06-04 14:07:51,160 INFO L125 PetriNetUnfolderBase]: For 29255/29255 co-relation queries the response was YES. [2024-06-04 14:07:51,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6051 conditions, 1384 events. 808/1384 cut-off events. For 29255/29255 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7433 event pairs, 359 based on Foata normal form. 26/1408 useless extension candidates. Maximal degree in co-relation 5997. Up to 1122 conditions per place. [2024-06-04 14:07:51,166 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 65 selfloop transitions, 15 changer transitions 12/98 dead transitions. [2024-06-04 14:07:51,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 98 transitions, 884 flow [2024-06-04 14:07:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 14:07:51,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-04 14:07:51,167 INFO L175 Difference]: Start difference. First operand has 122 places, 86 transitions, 652 flow. Second operand 8 states and 154 transitions. [2024-06-04 14:07:51,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 98 transitions, 884 flow [2024-06-04 14:07:51,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 98 transitions, 807 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 14:07:51,184 INFO L231 Difference]: Finished difference. Result has 118 places, 82 transitions, 576 flow [2024-06-04 14:07:51,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2024-06-04 14:07:51,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-04 14:07:51,184 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 576 flow [2024-06-04 14:07:51,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:51,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:51,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:51,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:07:51,184 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:51,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1773725410, now seen corresponding path program 10 times [2024-06-04 14:07:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300890585] [2024-06-04 14:07:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:51,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:51,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300890585] [2024-06-04 14:07:51,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300890585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:51,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:51,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:51,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608233335] [2024-06-04 14:07:51,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:51,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:51,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:51,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:51,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:51,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:51,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:51,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:51,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:51,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:51,490 INFO L124 PetriNetUnfolderBase]: 679/1173 cut-off events. [2024-06-04 14:07:51,490 INFO L125 PetriNetUnfolderBase]: For 19489/19489 co-relation queries the response was YES. [2024-06-04 14:07:51,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4604 conditions, 1173 events. 679/1173 cut-off events. For 19489/19489 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6092 event pairs, 219 based on Foata normal form. 24/1195 useless extension candidates. Maximal degree in co-relation 4551. Up to 856 conditions per place. [2024-06-04 14:07:51,496 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 12 changer transitions 13/98 dead transitions. [2024-06-04 14:07:51,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 98 transitions, 832 flow [2024-06-04 14:07:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 14:07:51,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-04 14:07:51,496 INFO L175 Difference]: Start difference. First operand has 118 places, 82 transitions, 576 flow. Second operand 8 states and 156 transitions. [2024-06-04 14:07:51,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 98 transitions, 832 flow [2024-06-04 14:07:51,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 98 transitions, 798 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:07:51,509 INFO L231 Difference]: Finished difference. Result has 115 places, 76 transitions, 521 flow [2024-06-04 14:07:51,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=521, PETRI_PLACES=115, PETRI_TRANSITIONS=76} [2024-06-04 14:07:51,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-04 14:07:51,509 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 76 transitions, 521 flow [2024-06-04 14:07:51,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:51,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:51,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:51,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:07:51,510 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:51,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1712643742, now seen corresponding path program 11 times [2024-06-04 14:07:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:51,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904031653] [2024-06-04 14:07:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:51,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:51,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:51,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904031653] [2024-06-04 14:07:51,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904031653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:51,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:51,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:51,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410024956] [2024-06-04 14:07:51,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:51,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:51,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:51,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:51,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:51,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 76 transitions, 521 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:51,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:51,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:51,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:51,759 INFO L124 PetriNetUnfolderBase]: 744/1300 cut-off events. [2024-06-04 14:07:51,759 INFO L125 PetriNetUnfolderBase]: For 22012/22012 co-relation queries the response was YES. [2024-06-04 14:07:51,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 1300 events. 744/1300 cut-off events. For 22012/22012 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6954 event pairs, 91 based on Foata normal form. 18/1314 useless extension candidates. Maximal degree in co-relation 5265. Up to 698 conditions per place. [2024-06-04 14:07:51,764 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 67 selfloop transitions, 16 changer transitions 13/102 dead transitions. [2024-06-04 14:07:51,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 102 transitions, 877 flow [2024-06-04 14:07:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:07:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:07:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-04 14:07:51,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-04 14:07:51,764 INFO L175 Difference]: Start difference. First operand has 115 places, 76 transitions, 521 flow. Second operand 8 states and 165 transitions. [2024-06-04 14:07:51,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 102 transitions, 877 flow [2024-06-04 14:07:51,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 832 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-04 14:07:51,780 INFO L231 Difference]: Finished difference. Result has 110 places, 74 transitions, 501 flow [2024-06-04 14:07:51,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=501, PETRI_PLACES=110, PETRI_TRANSITIONS=74} [2024-06-04 14:07:51,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-04 14:07:51,780 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 74 transitions, 501 flow [2024-06-04 14:07:51,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:51,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:51,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:51,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:07:51,780 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:51,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:51,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1685045522, now seen corresponding path program 12 times [2024-06-04 14:07:51,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:51,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344665096] [2024-06-04 14:07:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:51,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:51,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:51,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344665096] [2024-06-04 14:07:51,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344665096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:51,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:51,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:51,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175533131] [2024-06-04 14:07:51,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:51,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:51,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:51,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 74 transitions, 501 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:51,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:51,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:52,093 INFO L124 PetriNetUnfolderBase]: 700/1226 cut-off events. [2024-06-04 14:07:52,094 INFO L125 PetriNetUnfolderBase]: For 22001/22001 co-relation queries the response was YES. [2024-06-04 14:07:52,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5126 conditions, 1226 events. 700/1226 cut-off events. For 22001/22001 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6520 event pairs, 64 based on Foata normal form. 18/1242 useless extension candidates. Maximal degree in co-relation 5075. Up to 698 conditions per place. [2024-06-04 14:07:52,099 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 19 changer transitions 8/100 dead transitions. [2024-06-04 14:07:52,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 100 transitions, 850 flow [2024-06-04 14:07:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 14:07:52,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:07:52,099 INFO L175 Difference]: Start difference. First operand has 110 places, 74 transitions, 501 flow. Second operand 9 states and 180 transitions. [2024-06-04 14:07:52,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 100 transitions, 850 flow [2024-06-04 14:07:52,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 100 transitions, 814 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:07:52,112 INFO L231 Difference]: Finished difference. Result has 111 places, 73 transitions, 503 flow [2024-06-04 14:07:52,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=503, PETRI_PLACES=111, PETRI_TRANSITIONS=73} [2024-06-04 14:07:52,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-04 14:07:52,112 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 73 transitions, 503 flow [2024-06-04 14:07:52,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:52,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:52,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:52,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:07:52,113 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:52,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash 985181480, now seen corresponding path program 13 times [2024-06-04 14:07:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:52,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804914622] [2024-06-04 14:07:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:52,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:52,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:52,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804914622] [2024-06-04 14:07:52,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804914622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:52,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:52,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:52,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826654379] [2024-06-04 14:07:52,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:52,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:52,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:52,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:52,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 73 transitions, 503 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:52,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:52,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:52,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:52,390 INFO L124 PetriNetUnfolderBase]: 595/1039 cut-off events. [2024-06-04 14:07:52,391 INFO L125 PetriNetUnfolderBase]: For 16151/16151 co-relation queries the response was YES. [2024-06-04 14:07:52,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4146 conditions, 1039 events. 595/1039 cut-off events. For 16151/16151 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5240 event pairs, 52 based on Foata normal form. 18/1055 useless extension candidates. Maximal degree in co-relation 4095. Up to 698 conditions per place. [2024-06-04 14:07:52,394 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 16 changer transitions 13/93 dead transitions. [2024-06-04 14:07:52,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 93 transitions, 757 flow [2024-06-04 14:07:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:07:52,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-04 14:07:52,395 INFO L175 Difference]: Start difference. First operand has 111 places, 73 transitions, 503 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:07:52,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 93 transitions, 757 flow [2024-06-04 14:07:52,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 715 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:52,407 INFO L231 Difference]: Finished difference. Result has 111 places, 66 transitions, 444 flow [2024-06-04 14:07:52,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=444, PETRI_PLACES=111, PETRI_TRANSITIONS=66} [2024-06-04 14:07:52,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-04 14:07:52,407 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 66 transitions, 444 flow [2024-06-04 14:07:52,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:52,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:52,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:52,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:07:52,408 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:52,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:52,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1235992666, now seen corresponding path program 14 times [2024-06-04 14:07:52,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:52,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599293932] [2024-06-04 14:07:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:52,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:52,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:52,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599293932] [2024-06-04 14:07:52,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599293932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:52,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:52,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:52,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537355264] [2024-06-04 14:07:52,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:52,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:52,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 66 transitions, 444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:52,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:52,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:52,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:52,682 INFO L124 PetriNetUnfolderBase]: 659/1149 cut-off events. [2024-06-04 14:07:52,682 INFO L125 PetriNetUnfolderBase]: For 23989/23989 co-relation queries the response was YES. [2024-06-04 14:07:52,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 1149 events. 659/1149 cut-off events. For 23989/23989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6067 event pairs, 272 based on Foata normal form. 24/1172 useless extension candidates. Maximal degree in co-relation 4833. Up to 576 conditions per place. [2024-06-04 14:07:52,686 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 56 selfloop transitions, 12 changer transitions 16/90 dead transitions. [2024-06-04 14:07:52,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 90 transitions, 766 flow [2024-06-04 14:07:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 14:07:52,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-04 14:07:52,687 INFO L175 Difference]: Start difference. First operand has 111 places, 66 transitions, 444 flow. Second operand 10 states and 192 transitions. [2024-06-04 14:07:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 90 transitions, 766 flow [2024-06-04 14:07:52,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 90 transitions, 687 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-04 14:07:52,698 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 367 flow [2024-06-04 14:07:52,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=367, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2024-06-04 14:07:52,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-04 14:07:52,698 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 367 flow [2024-06-04 14:07:52,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:52,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:52,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:52,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:07:52,698 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:52,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2015711204, now seen corresponding path program 15 times [2024-06-04 14:07:52,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:52,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830874739] [2024-06-04 14:07:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:52,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830874739] [2024-06-04 14:07:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830874739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:52,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093344612] [2024-06-04 14:07:52,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:52,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:52,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:52,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:52,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 367 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:52,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:52,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:52,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:52,979 INFO L124 PetriNetUnfolderBase]: 599/1041 cut-off events. [2024-06-04 14:07:52,979 INFO L125 PetriNetUnfolderBase]: For 23633/23633 co-relation queries the response was YES. [2024-06-04 14:07:52,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4410 conditions, 1041 events. 599/1041 cut-off events. For 23633/23633 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5314 event pairs, 256 based on Foata normal form. 24/1064 useless extension candidates. Maximal degree in co-relation 4365. Up to 576 conditions per place. [2024-06-04 14:07:52,983 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 55 selfloop transitions, 11 changer transitions 10/82 dead transitions. [2024-06-04 14:07:52,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 82 transitions, 649 flow [2024-06-04 14:07:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 14:07:52,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-04 14:07:52,983 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 367 flow. Second operand 10 states and 186 transitions. [2024-06-04 14:07:52,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 82 transitions, 649 flow [2024-06-04 14:07:52,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 618 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:52,991 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 345 flow [2024-06-04 14:07:52,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2024-06-04 14:07:52,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-04 14:07:52,992 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 345 flow [2024-06-04 14:07:52,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:52,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:52,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:07:52,992 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:52,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash -601525390, now seen corresponding path program 16 times [2024-06-04 14:07:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:52,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692820218] [2024-06-04 14:07:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:52,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:53,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:53,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692820218] [2024-06-04 14:07:53,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692820218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:53,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:53,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:53,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058537118] [2024-06-04 14:07:53,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:53,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:53,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:53,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:53,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:53,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 59 transitions, 345 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:53,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:53,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:53,269 INFO L124 PetriNetUnfolderBase]: 448/784 cut-off events. [2024-06-04 14:07:53,269 INFO L125 PetriNetUnfolderBase]: For 13285/13285 co-relation queries the response was YES. [2024-06-04 14:07:53,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2896 conditions, 784 events. 448/784 cut-off events. For 13285/13285 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3699 event pairs, 211 based on Foata normal form. 26/809 useless extension candidates. Maximal degree in co-relation 2853. Up to 576 conditions per place. [2024-06-04 14:07:53,272 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 44 selfloop transitions, 5 changer transitions 16/71 dead transitions. [2024-06-04 14:07:53,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 71 transitions, 515 flow [2024-06-04 14:07:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:07:53,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 14:07:53,272 INFO L175 Difference]: Start difference. First operand has 97 places, 59 transitions, 345 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:07:53,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 71 transitions, 515 flow [2024-06-04 14:07:53,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 71 transitions, 492 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:53,279 INFO L231 Difference]: Finished difference. Result has 95 places, 52 transitions, 282 flow [2024-06-04 14:07:53,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=95, PETRI_TRANSITIONS=52} [2024-06-04 14:07:53,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-04 14:07:53,279 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 52 transitions, 282 flow [2024-06-04 14:07:53,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:53,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:53,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:07:53,279 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:53,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1647263804, now seen corresponding path program 17 times [2024-06-04 14:07:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:53,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185554004] [2024-06-04 14:07:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:53,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:53,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:53,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185554004] [2024-06-04 14:07:53,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185554004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:53,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:53,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:53,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162280425] [2024-06-04 14:07:53,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:53,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:53,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:53,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:53,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 52 transitions, 282 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:53,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:53,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:53,526 INFO L124 PetriNetUnfolderBase]: 492/880 cut-off events. [2024-06-04 14:07:53,526 INFO L125 PetriNetUnfolderBase]: For 14502/14502 co-relation queries the response was YES. [2024-06-04 14:07:53,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3443 conditions, 880 events. 492/880 cut-off events. For 14502/14502 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4364 event pairs, 161 based on Foata normal form. 18/897 useless extension candidates. Maximal degree in co-relation 3401. Up to 422 conditions per place. [2024-06-04 14:07:53,529 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 50 selfloop transitions, 7 changer transitions 13/76 dead transitions. [2024-06-04 14:07:53,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 76 transitions, 562 flow [2024-06-04 14:07:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:07:53,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-04 14:07:53,530 INFO L175 Difference]: Start difference. First operand has 95 places, 52 transitions, 282 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:07:53,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 76 transitions, 562 flow [2024-06-04 14:07:53,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 76 transitions, 515 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:53,535 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 256 flow [2024-06-04 14:07:53,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2024-06-04 14:07:53,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-04 14:07:53,536 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 256 flow [2024-06-04 14:07:53,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:53,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:53,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:07:53,536 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:53,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1713524148, now seen corresponding path program 18 times [2024-06-04 14:07:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:53,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922843281] [2024-06-04 14:07:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:53,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922843281] [2024-06-04 14:07:53,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922843281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:53,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:53,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617617185] [2024-06-04 14:07:53,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:53,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:53,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:53,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 256 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:53,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:53,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:53,795 INFO L124 PetriNetUnfolderBase]: 448/808 cut-off events. [2024-06-04 14:07:53,795 INFO L125 PetriNetUnfolderBase]: For 10606/10606 co-relation queries the response was YES. [2024-06-04 14:07:53,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 808 events. 448/808 cut-off events. For 10606/10606 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3941 event pairs, 153 based on Foata normal form. 18/825 useless extension candidates. Maximal degree in co-relation 2955. Up to 422 conditions per place. [2024-06-04 14:07:53,798 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 51 selfloop transitions, 8 changer transitions 12/77 dead transitions. [2024-06-04 14:07:53,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 77 transitions, 528 flow [2024-06-04 14:07:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-04 14:07:53,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-04 14:07:53,799 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 256 flow. Second operand 11 states and 202 transitions. [2024-06-04 14:07:53,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 77 transitions, 528 flow [2024-06-04 14:07:53,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 504 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:53,802 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 245 flow [2024-06-04 14:07:53,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=245, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2024-06-04 14:07:53,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-04 14:07:53,803 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 245 flow [2024-06-04 14:07:53,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:53,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:53,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:07:53,803 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:53,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1713529728, now seen corresponding path program 19 times [2024-06-04 14:07:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:53,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732131853] [2024-06-04 14:07:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:53,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:53,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:53,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732131853] [2024-06-04 14:07:53,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732131853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:53,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:53,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:53,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88892778] [2024-06-04 14:07:53,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:53,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:53,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:53,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:53,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:53,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 245 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:53,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:53,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:54,044 INFO L124 PetriNetUnfolderBase]: 343/621 cut-off events. [2024-06-04 14:07:54,045 INFO L125 PetriNetUnfolderBase]: For 5898/5898 co-relation queries the response was YES. [2024-06-04 14:07:54,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 621 events. 343/621 cut-off events. For 5898/5898 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2776 event pairs, 141 based on Foata normal form. 18/638 useless extension candidates. Maximal degree in co-relation 2075. Up to 422 conditions per place. [2024-06-04 14:07:54,046 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 35 selfloop transitions, 3 changer transitions 20/64 dead transitions. [2024-06-04 14:07:54,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 64 transitions, 413 flow [2024-06-04 14:07:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:07:54,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-04 14:07:54,047 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 245 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:07:54,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 64 transitions, 413 flow [2024-06-04 14:07:54,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 64 transitions, 394 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:07:54,049 INFO L231 Difference]: Finished difference. Result has 81 places, 42 transitions, 205 flow [2024-06-04 14:07:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=205, PETRI_PLACES=81, PETRI_TRANSITIONS=42} [2024-06-04 14:07:54,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-04 14:07:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 42 transitions, 205 flow [2024-06-04 14:07:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:54,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:07:54,050 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:54,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:54,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1356038226, now seen corresponding path program 20 times [2024-06-04 14:07:54,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:54,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520530112] [2024-06-04 14:07:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:54,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:54,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520530112] [2024-06-04 14:07:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520530112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:54,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:54,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:07:54,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235163837] [2024-06-04 14:07:54,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:54,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:07:54,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:54,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:07:54,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:07:54,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:54,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 42 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:54,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:54,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:54,283 INFO L124 PetriNetUnfolderBase]: 393/710 cut-off events. [2024-06-04 14:07:54,283 INFO L125 PetriNetUnfolderBase]: For 7650/7650 co-relation queries the response was YES. [2024-06-04 14:07:54,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 710 events. 393/710 cut-off events. For 7650/7650 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3372 event pairs, 71 based on Foata normal form. 18/726 useless extension candidates. Maximal degree in co-relation 2540. Up to 204 conditions per place. [2024-06-04 14:07:54,285 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 41 selfloop transitions, 12 changer transitions 13/72 dead transitions. [2024-06-04 14:07:54,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 471 flow [2024-06-04 14:07:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 14:07:54,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-04 14:07:54,286 INFO L175 Difference]: Start difference. First operand has 81 places, 42 transitions, 205 flow. Second operand 10 states and 192 transitions. [2024-06-04 14:07:54,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 471 flow [2024-06-04 14:07:54,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 447 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:54,288 INFO L231 Difference]: Finished difference. Result has 72 places, 39 transitions, 198 flow [2024-06-04 14:07:54,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=198, PETRI_PLACES=72, PETRI_TRANSITIONS=39} [2024-06-04 14:07:54,289 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-04 14:07:54,289 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 39 transitions, 198 flow [2024-06-04 14:07:54,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:54,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:07:54,290 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:54,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2121279086, now seen corresponding path program 21 times [2024-06-04 14:07:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:54,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663035458] [2024-06-04 14:07:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:54,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:54,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663035458] [2024-06-04 14:07:54,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663035458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:54,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:54,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:54,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888910960] [2024-06-04 14:07:54,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:54,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:54,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:54,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:54,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 39 transitions, 198 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:54,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:54,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:54,566 INFO L124 PetriNetUnfolderBase]: 450/818 cut-off events. [2024-06-04 14:07:54,567 INFO L125 PetriNetUnfolderBase]: For 7104/7104 co-relation queries the response was YES. [2024-06-04 14:07:54,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 818 events. 450/818 cut-off events. For 7104/7104 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4161 event pairs, 118 based on Foata normal form. 18/835 useless extension candidates. Maximal degree in co-relation 3009. Up to 387 conditions per place. [2024-06-04 14:07:54,569 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 12 changer transitions 8/69 dead transitions. [2024-06-04 14:07:54,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 451 flow [2024-06-04 14:07:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-04 14:07:54,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-04 14:07:54,570 INFO L175 Difference]: Start difference. First operand has 72 places, 39 transitions, 198 flow. Second operand 11 states and 206 transitions. [2024-06-04 14:07:54,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 451 flow [2024-06-04 14:07:54,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 409 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:54,573 INFO L231 Difference]: Finished difference. Result has 70 places, 38 transitions, 191 flow [2024-06-04 14:07:54,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=38} [2024-06-04 14:07:54,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-04 14:07:54,574 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 38 transitions, 191 flow [2024-06-04 14:07:54,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:54,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:07:54,574 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:54,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1999593288, now seen corresponding path program 22 times [2024-06-04 14:07:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:54,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754816818] [2024-06-04 14:07:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:54,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:54,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:54,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754816818] [2024-06-04 14:07:54,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754816818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:54,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:54,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953201026] [2024-06-04 14:07:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:54,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 38 transitions, 191 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:54,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:54,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:54,824 INFO L124 PetriNetUnfolderBase]: 345/631 cut-off events. [2024-06-04 14:07:54,824 INFO L125 PetriNetUnfolderBase]: For 3964/3964 co-relation queries the response was YES. [2024-06-04 14:07:54,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2194 conditions, 631 events. 345/631 cut-off events. For 3964/3964 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2969 event pairs, 106 based on Foata normal form. 18/648 useless extension candidates. Maximal degree in co-relation 2165. Up to 387 conditions per place. [2024-06-04 14:07:54,826 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 30 selfloop transitions, 8 changer transitions 16/60 dead transitions. [2024-06-04 14:07:54,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 60 transitions, 365 flow [2024-06-04 14:07:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-04 14:07:54,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-04 14:07:54,827 INFO L175 Difference]: Start difference. First operand has 70 places, 38 transitions, 191 flow. Second operand 10 states and 184 transitions. [2024-06-04 14:07:54,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 60 transitions, 365 flow [2024-06-04 14:07:54,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 337 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:54,829 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 161 flow [2024-06-04 14:07:54,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-04 14:07:54,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-04 14:07:54,829 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 161 flow [2024-06-04 14:07:54,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:54,829 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, 1, 1] [2024-06-04 14:07:54,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:07:54,830 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:54,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:54,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1800297078, now seen corresponding path program 23 times [2024-06-04 14:07:54,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:54,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856021070] [2024-06-04 14:07:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:54,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:54,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:54,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856021070] [2024-06-04 14:07:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856021070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:54,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:54,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:54,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712781310] [2024-06-04 14:07:54,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:54,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:54,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 161 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:54,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:54,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:54,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:55,091 INFO L124 PetriNetUnfolderBase]: 313/579 cut-off events. [2024-06-04 14:07:55,091 INFO L125 PetriNetUnfolderBase]: For 3830/3830 co-relation queries the response was YES. [2024-06-04 14:07:55,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 579 events. 313/579 cut-off events. For 3830/3830 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2730 event pairs, 68 based on Foata normal form. 18/596 useless extension candidates. Maximal degree in co-relation 1965. Up to 204 conditions per place. [2024-06-04 14:07:55,092 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 37 selfloop transitions, 8 changer transitions 12/63 dead transitions. [2024-06-04 14:07:55,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 385 flow [2024-06-04 14:07:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:07:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:07:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-04 14:07:55,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-04 14:07:55,093 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 161 flow. Second operand 11 states and 201 transitions. [2024-06-04 14:07:55,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 385 flow [2024-06-04 14:07:55,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 361 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:07:55,094 INFO L231 Difference]: Finished difference. Result has 65 places, 32 transitions, 148 flow [2024-06-04 14:07:55,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=32} [2024-06-04 14:07:55,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-04 14:07:55,095 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 32 transitions, 148 flow [2024-06-04 14:07:55,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:55,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:55,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:55,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:07:55,095 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:55,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1020795598, now seen corresponding path program 24 times [2024-06-04 14:07:55,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:55,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924197994] [2024-06-04 14:07:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:55,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924197994] [2024-06-04 14:07:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924197994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:55,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:55,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:55,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890821460] [2024-06-04 14:07:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:55,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:55,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:55,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 32 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:55,312 INFO L124 PetriNetUnfolderBase]: 208/396 cut-off events. [2024-06-04 14:07:55,312 INFO L125 PetriNetUnfolderBase]: For 2212/2212 co-relation queries the response was YES. [2024-06-04 14:07:55,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 396 events. 208/396 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1614 event pairs, 12 based on Foata normal form. 18/413 useless extension candidates. Maximal degree in co-relation 1253. Up to 147 conditions per place. [2024-06-04 14:07:55,313 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 27 selfloop transitions, 6 changer transitions 13/52 dead transitions. [2024-06-04 14:07:55,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 52 transitions, 302 flow [2024-06-04 14:07:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:07:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:07:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 14:07:55,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-04 14:07:55,313 INFO L175 Difference]: Start difference. First operand has 65 places, 32 transitions, 148 flow. Second operand 10 states and 176 transitions. [2024-06-04 14:07:55,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 52 transitions, 302 flow [2024-06-04 14:07:55,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 277 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 14:07:55,315 INFO L231 Difference]: Finished difference. Result has 62 places, 29 transitions, 124 flow [2024-06-04 14:07:55,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=124, PETRI_PLACES=62, PETRI_TRANSITIONS=29} [2024-06-04 14:07:55,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-04 14:07:55,315 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 29 transitions, 124 flow [2024-06-04 14:07:55,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:55,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:07:55,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:55,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:07:55,315 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:07:55,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:07:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1562697246, now seen corresponding path program 25 times [2024-06-04 14:07:55,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:07:55,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125978546] [2024-06-04 14:07:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:07:55,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:07:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:07:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:07:55,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:07:55,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125978546] [2024-06-04 14:07:55,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125978546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:07:55,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:07:55,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:07:55,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342589527] [2024-06-04 14:07:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:07:55,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:07:55,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:07:55,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:07:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:07:55,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-04 14:07:55,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 29 transitions, 124 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:55,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:07:55,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-04 14:07:55,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:07:55,556 INFO L124 PetriNetUnfolderBase]: 83/177 cut-off events. [2024-06-04 14:07:55,556 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2024-06-04 14:07:55,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 177 events. 83/177 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 513 event pairs, 0 based on Foata normal form. 18/194 useless extension candidates. Maximal degree in co-relation 494. Up to 96 conditions per place. [2024-06-04 14:07:55,556 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-04 14:07:55,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 40 transitions, 202 flow [2024-06-04 14:07:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:07:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:07:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 14:07:55,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-04 14:07:55,557 INFO L175 Difference]: Start difference. First operand has 62 places, 29 transitions, 124 flow. Second operand 9 states and 152 transitions. [2024-06-04 14:07:55,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 40 transitions, 202 flow [2024-06-04 14:07:55,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 40 transitions, 177 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-04 14:07:55,558 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2024-06-04 14:07:55,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2024-06-04 14:07:55,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-04 14:07:55,558 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2024-06-04 14:07:55,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:07:55,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-04 14:07:55,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-04 14:07:55,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-04 14:07:55,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-04 14:07:55,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-04 14:07:55,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-04 14:07:55,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 14:07:55,561 INFO L445 BasicCegarLoop]: Path program histogram: [25, 15, 12, 9, 7, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:07:55,563 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 14:07:55,563 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 14:07:55,567 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-04 14:07:55,567 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-04 14:07:55,568 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 02:07:55 BasicIcfg [2024-06-04 14:07:55,568 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 14:07:55,569 INFO L158 Benchmark]: Toolchain (without parser) took 76240.17ms. Allocated memory was 159.4MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 79.9MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-06-04 14:07:55,569 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 110.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 14:07:55,569 INFO L158 Benchmark]: Witness Parser took 0.82ms. Allocated memory is still 159.4MB. Free memory was 83.9MB in the beginning and 83.8MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 14:07:55,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.98ms. Allocated memory was 159.4MB in the beginning and 220.2MB in the end (delta: 60.8MB). Free memory was 79.7MB in the beginning and 175.1MB in the end (delta: -95.4MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2024-06-04 14:07:55,570 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.87ms. Allocated memory is still 220.2MB. Free memory was 175.1MB in the beginning and 173.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 14:07:55,570 INFO L158 Benchmark]: Boogie Preprocessor took 73.12ms. Allocated memory is still 220.2MB. Free memory was 173.0MB in the beginning and 170.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 14:07:55,570 INFO L158 Benchmark]: RCFGBuilder took 411.94ms. Allocated memory is still 220.2MB. Free memory was 170.6MB in the beginning and 143.6MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-04 14:07:55,570 INFO L158 Benchmark]: TraceAbstraction took 75210.37ms. Allocated memory was 220.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 142.6MB in the beginning and 1.1GB in the end (delta: -977.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-06-04 14:07:55,571 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 110.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.82ms. Allocated memory is still 159.4MB. Free memory was 83.9MB in the beginning and 83.8MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 499.98ms. Allocated memory was 159.4MB in the beginning and 220.2MB in the end (delta: 60.8MB). Free memory was 79.7MB in the beginning and 175.1MB in the end (delta: -95.4MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.87ms. Allocated memory is still 220.2MB. Free memory was 175.1MB in the beginning and 173.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.12ms. Allocated memory is still 220.2MB. Free memory was 173.0MB in the beginning and 170.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 411.94ms. Allocated memory is still 220.2MB. Free memory was 170.6MB in the beginning and 143.6MB in the end (delta: 27.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 75210.37ms. Allocated memory was 220.2MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 142.6MB in the beginning and 1.1GB in the end (delta: -977.9MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 776]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 779]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 64 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 75.1s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 62.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9573 SdHoareTripleChecker+Valid, 13.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7908 mSDsluCounter, 2749 SdHoareTripleChecker+Invalid, 11.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1879 mSDsCounter, 1389 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34206 IncrementalHoareTripleChecker+Invalid, 35595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1389 mSolverCounterUnsat, 870 mSDtfsCounter, 34206 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 999 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 999 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2194occurred in iteration=62, InterpolantAutomatonStates: 1055, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 2571 NumberOfCodeBlocks, 2571 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2438 ConstructedInterpolants, 0 QuantifiedInterpolants, 22772 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-04 14:07:55,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE