./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_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/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe014_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-cde23df-m [2024-06-14 11:26:19,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:26:19,753 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:26:19,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:26:19,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:26:19,770 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:26:19,771 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:26:19,771 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:26:19,771 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:26:19,772 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:26:19,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:26:19,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:26:19,773 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:26:19,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:26:19,773 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:26:19,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:26:19,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:26:19,774 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:26:19,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:26:19,775 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:26:19,775 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:26:19,775 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:26:19,776 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:26:19,776 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:26:19,776 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:26:19,777 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:26:19,777 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:26:19,777 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:26:19,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:26:19,778 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:26:19,778 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:26:19,778 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:26:19,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:26:19,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:26:19,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:26:19,779 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:26:19,779 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:26:19,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:26:19,780 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:26:19,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:26:19,780 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:26:19,781 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:26:19,781 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:26:19,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:26:19,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:26:19,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:26:19,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:26:19,971 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:26:19,972 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:26:19,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:26:20,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:26:21,208 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:26:21,212 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:26:21,222 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/866400baa/0e2d36ef3bab437ca494533beb130c7b/FLAG1bc3d18e0 [2024-06-14 11:26:21,236 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/866400baa/0e2d36ef3bab437ca494533beb130c7b [2024-06-14 11:26:21,238 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:26:21,246 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:26:21,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 11:26:21,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:26:21,351 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:26:21,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:26:21,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:26:21,359 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:26:21,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:26:21" (1/2) ... [2024-06-14 11:26:21,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486b8bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:26:21, skipping insertion in model container [2024-06-14 11:26:21,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:26:21" (1/2) ... [2024-06-14 11:26:21,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39a9ac27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:26:21, skipping insertion in model container [2024-06-14 11:26:21,362 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:26:21" (2/2) ... [2024-06-14 11:26:21,363 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486b8bf0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21, skipping insertion in model container [2024-06-14 11:26:21,363 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:26:21" (2/2) ... [2024-06-14 11:26:21,363 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:26:21,401 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:26:21,402 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) [2024-06-14 11:26:21,402 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) [2024-06-14 11:26:21,403 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) [2024-06-14 11:26:21,403 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:26:21,403 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-14 11:26:21,433 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:26:21,645 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:26:21,651 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:26:21,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:26:21,810 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:26:21,811 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21 WrapperNode [2024-06-14 11:26:21,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:26:21,813 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:26:21,813 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:26:21,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:26:21,818 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 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,842 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 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,875 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 11:26:21,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:26:21,876 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:26:21,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:26:21,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:26:21,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,888 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,910 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]. [2024-06-14 11:26:21,910 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,910 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,916 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,916 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:26:21,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:26:21,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:26:21,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:26:21,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (1/1) ... [2024-06-14 11:26:21,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:26:21,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:26:21,943 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) [2024-06-14 11:26:21,961 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 [2024-06-14 11:26:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:26:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:26:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:26:21,974 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:26:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:26:21,975 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:26:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:26:21,975 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:26:21,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:26:21,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:26:21,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:26:21,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:26:21,977 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:26:22,082 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:26:22,084 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:26:22,258 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:26:22,260 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:26:22,327 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:26:22,327 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:26:22,328 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:26:22 BoogieIcfgContainer [2024-06-14 11:26:22,328 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:26:22,329 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:26:22,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:26:22,331 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:26:22,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:26:21" (1/4) ... [2024-06-14 11:26:22,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ffaccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:26:22, skipping insertion in model container [2024-06-14 11:26:22,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:26:21" (2/4) ... [2024-06-14 11:26:22,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ffaccc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:26:22, skipping insertion in model container [2024-06-14 11:26:22,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:26:21" (3/4) ... [2024-06-14 11:26:22,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ffaccc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:26:22, skipping insertion in model container [2024-06-14 11:26:22,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:26:22" (4/4) ... [2024-06-14 11:26:22,334 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:26:22,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:26:22,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:26:22,350 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:26:22,377 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:26:22,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:26:22,422 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 11:26:22,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:26:22,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:26:22,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:26:22,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 11:26:22,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:26:22,442 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;@118799ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:26:22,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:26:22,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:26:22,449 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:26:22,450 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:26:22,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:22,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:26:22,451 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)] === [2024-06-14 11:26:22,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-14 11:26:22,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:22,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700040264] [2024-06-14 11:26:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:22,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700040264] [2024-06-14 11:26:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700040264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:22,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:22,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:26:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026360884] [2024-06-14 11:26:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:22,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:26:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:26:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:26:22,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-14 11:26:22,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:22,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:22,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-14 11:26:22,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:23,063 INFO L124 PetriNetUnfolderBase]: 430/730 cut-off events. [2024-06-14 11:26:23,063 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-14 11:26:23,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 730 events. 430/730 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3710 event pairs, 241 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 1440. Up to 672 conditions per place. [2024-06-14 11:26:23,073 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 11:26:23,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-14 11:26:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:26:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:26:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-14 11:26:23,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-14 11:26:23,086 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-14 11:26:23,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-14 11:26:23,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:23,091 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 11:26:23,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 11:26:23,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 11:26:23,097 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 11:26:23,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:23,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:23,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:23,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:26:23,098 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)] === [2024-06-14 11:26:23,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash -116908628, now seen corresponding path program 1 times [2024-06-14 11:26:23,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553454988] [2024-06-14 11:26:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:23,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:23,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553454988] [2024-06-14 11:26:23,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553454988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:23,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:23,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215414779] [2024-06-14 11:26:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:23,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:23,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:23,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 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) [2024-06-14 11:26:23,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:23,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:23,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:23,603 INFO L124 PetriNetUnfolderBase]: 755/1248 cut-off events. [2024-06-14 11:26:23,604 INFO L125 PetriNetUnfolderBase]: For 222/236 co-relation queries the response was YES. [2024-06-14 11:26:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1248 events. 755/1248 cut-off events. For 222/236 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6102 event pairs, 249 based on Foata normal form. 13/1224 useless extension candidates. Maximal degree in co-relation 2828. Up to 1093 conditions per place. [2024-06-14 11:26:23,612 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 37 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-14 11:26:23,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 224 flow [2024-06-14 11:26:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:26:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:26:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 11:26:23,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 11:26:23,616 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 102 transitions. [2024-06-14 11:26:23,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 224 flow [2024-06-14 11:26:23,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:26:23,620 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-14 11:26:23,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-14 11:26:23,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-14 11:26:23,621 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-14 11:26:23,621 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) [2024-06-14 11:26:23,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:23,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:23,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:26:23,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:23,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:23,630 INFO L85 PathProgramCache]: Analyzing trace with hash -214704722, now seen corresponding path program 1 times [2024-06-14 11:26:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900294989] [2024-06-14 11:26:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:23,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:23,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900294989] [2024-06-14 11:26:23,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900294989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:23,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:23,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:26:23,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416706219] [2024-06-14 11:26:23,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:23,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:26:23,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:23,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:26:23,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:26:23,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:23,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:23,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:23,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:23,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:23,927 INFO L124 PetriNetUnfolderBase]: 705/1163 cut-off events. [2024-06-14 11:26:23,927 INFO L125 PetriNetUnfolderBase]: For 541/541 co-relation queries the response was YES. [2024-06-14 11:26:23,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2881 conditions, 1163 events. 705/1163 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5657 event pairs, 266 based on Foata normal form. 2/1161 useless extension candidates. Maximal degree in co-relation 2864. Up to 1056 conditions per place. [2024-06-14 11:26:23,934 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-14 11:26:23,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 279 flow [2024-06-14 11:26:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:26:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:26:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 11:26:23,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 11:26:23,937 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 4 states and 102 transitions. [2024-06-14 11:26:23,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 279 flow [2024-06-14 11:26:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 264 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:26:23,940 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 166 flow [2024-06-14 11:26:23,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-06-14 11:26:23,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-14 11:26:23,942 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 166 flow [2024-06-14 11:26:23,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:23,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:23,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:23,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:26:23,942 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)] === [2024-06-14 11:26:23,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1934893922, now seen corresponding path program 1 times [2024-06-14 11:26:23,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:23,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379159715] [2024-06-14 11:26:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:23,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:24,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:24,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379159715] [2024-06-14 11:26:24,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379159715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:24,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:24,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:26:24,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695582549] [2024-06-14 11:26:24,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:26:24,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:26:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:26:24,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:24,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:24,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:24,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:24,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:24,234 INFO L124 PetriNetUnfolderBase]: 700/1152 cut-off events. [2024-06-14 11:26:24,234 INFO L125 PetriNetUnfolderBase]: For 966/969 co-relation queries the response was YES. [2024-06-14 11:26:24,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3257 conditions, 1152 events. 700/1152 cut-off events. For 966/969 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5616 event pairs, 309 based on Foata normal form. 4/1153 useless extension candidates. Maximal degree in co-relation 3238. Up to 1051 conditions per place. [2024-06-14 11:26:24,240 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 40 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-14 11:26:24,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 302 flow [2024-06-14 11:26:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:26:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:26:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 11:26:24,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:26:24,242 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 166 flow. Second operand 4 states and 100 transitions. [2024-06-14 11:26:24,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 302 flow [2024-06-14 11:26:24,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 11:26:24,246 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 202 flow [2024-06-14 11:26:24,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-14 11:26:24,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-14 11:26:24,248 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 202 flow [2024-06-14 11:26:24,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:24,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:24,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:24,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:26:24,249 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)] === [2024-06-14 11:26:24,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2078014321, now seen corresponding path program 1 times [2024-06-14 11:26:24,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:24,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783710154] [2024-06-14 11:26:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:24,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783710154] [2024-06-14 11:26:24,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783710154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:24,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:24,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:24,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693346489] [2024-06-14 11:26:24,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:24,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:24,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:24,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:24,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-14 11:26:24,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:24,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:24,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:24,696 INFO L124 PetriNetUnfolderBase]: 931/1522 cut-off events. [2024-06-14 11:26:24,716 INFO L125 PetriNetUnfolderBase]: For 1728/1733 co-relation queries the response was YES. [2024-06-14 11:26:24,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4436 conditions, 1522 events. 931/1522 cut-off events. For 1728/1733 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7570 event pairs, 275 based on Foata normal form. 7/1527 useless extension candidates. Maximal degree in co-relation 4414. Up to 1338 conditions per place. [2024-06-14 11:26:24,723 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 59 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-14 11:26:24,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 85 transitions, 498 flow [2024-06-14 11:26:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:26:24,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 11:26:24,725 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 202 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:26:24,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 85 transitions, 498 flow [2024-06-14 11:26:24,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 85 transitions, 490 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:26:24,728 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 330 flow [2024-06-14 11:26:24,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-14 11:26:24,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 11:26:24,729 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 330 flow [2024-06-14 11:26:24,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-14 11:26:24,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:24,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:24,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:26:24,730 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)] === [2024-06-14 11:26:24,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash -176838555, now seen corresponding path program 2 times [2024-06-14 11:26:24,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:24,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335476506] [2024-06-14 11:26:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:24,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:24,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335476506] [2024-06-14 11:26:24,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335476506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:24,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:24,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625966511] [2024-06-14 11:26:24,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:24,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:24,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:24,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:24,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:24,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-14 11:26:24,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:24,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:24,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:25,079 INFO L124 PetriNetUnfolderBase]: 926/1514 cut-off events. [2024-06-14 11:26:25,079 INFO L125 PetriNetUnfolderBase]: For 3245/3245 co-relation queries the response was YES. [2024-06-14 11:26:25,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5244 conditions, 1514 events. 926/1514 cut-off events. For 3245/3245 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7416 event pairs, 323 based on Foata normal form. 2/1506 useless extension candidates. Maximal degree in co-relation 5216. Up to 1280 conditions per place. [2024-06-14 11:26:25,088 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 59 selfloop transitions, 25 changer transitions 0/90 dead transitions. [2024-06-14 11:26:25,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 658 flow [2024-06-14 11:26:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 11:26:25,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 11:26:25,090 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 330 flow. Second operand 6 states and 133 transitions. [2024-06-14 11:26:25,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 658 flow [2024-06-14 11:26:25,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 629 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-14 11:26:25,096 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 492 flow [2024-06-14 11:26:25,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-14 11:26:25,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 11:26:25,097 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 492 flow [2024-06-14 11:26:25,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-14 11:26:25,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:25,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:25,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:26:25,098 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)] === [2024-06-14 11:26:25,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash -287738719, now seen corresponding path program 1 times [2024-06-14 11:26:25,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:25,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787538051] [2024-06-14 11:26:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:25,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:25,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:25,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787538051] [2024-06-14 11:26:25,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787538051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:25,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:25,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:26:25,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406154463] [2024-06-14 11:26:25,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:25,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:26:25,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:25,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:26:25,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:26:25,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:25,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 492 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:25,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:25,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:25,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:25,373 INFO L124 PetriNetUnfolderBase]: 825/1405 cut-off events. [2024-06-14 11:26:25,373 INFO L125 PetriNetUnfolderBase]: For 4860/4880 co-relation queries the response was YES. [2024-06-14 11:26:25,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5483 conditions, 1405 events. 825/1405 cut-off events. For 4860/4880 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7074 event pairs, 280 based on Foata normal form. 22/1422 useless extension candidates. Maximal degree in co-relation 5449. Up to 1211 conditions per place. [2024-06-14 11:26:25,382 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 69 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-14 11:26:25,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 710 flow [2024-06-14 11:26:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:26:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:26:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 11:26:25,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 11:26:25,384 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 492 flow. Second operand 5 states and 121 transitions. [2024-06-14 11:26:25,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 710 flow [2024-06-14 11:26:25,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 693 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 11:26:25,390 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 524 flow [2024-06-14 11:26:25,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-14 11:26:25,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 11:26:25,391 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 524 flow [2024-06-14 11:26:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:25,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:25,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:25,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:26:25,392 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)] === [2024-06-14 11:26:25,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1911092097, now seen corresponding path program 1 times [2024-06-14 11:26:25,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:25,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130033697] [2024-06-14 11:26:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:25,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:25,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:25,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130033697] [2024-06-14 11:26:25,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130033697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:25,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:25,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767739073] [2024-06-14 11:26:25,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:25,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:25,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:25,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:25,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:25,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:25,751 INFO L124 PetriNetUnfolderBase]: 902/1486 cut-off events. [2024-06-14 11:26:25,752 INFO L125 PetriNetUnfolderBase]: For 5503/5510 co-relation queries the response was YES. [2024-06-14 11:26:25,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5947 conditions, 1486 events. 902/1486 cut-off events. For 5503/5510 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7302 event pairs, 295 based on Foata normal form. 9/1493 useless extension candidates. Maximal degree in co-relation 5911. Up to 1299 conditions per place. [2024-06-14 11:26:25,762 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 65 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-14 11:26:25,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 783 flow [2024-06-14 11:26:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 11:26:25,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 11:26:25,763 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 524 flow. Second operand 7 states and 153 transitions. [2024-06-14 11:26:25,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 783 flow [2024-06-14 11:26:25,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 744 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:25,773 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 549 flow [2024-06-14 11:26:25,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=549, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-06-14 11:26:25,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 11:26:25,775 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 549 flow [2024-06-14 11:26:25,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:25,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:25,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:25,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:26:25,776 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)] === [2024-06-14 11:26:25,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1245359277, now seen corresponding path program 2 times [2024-06-14 11:26:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:25,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859127686] [2024-06-14 11:26:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:25,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859127686] [2024-06-14 11:26:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859127686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:25,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143242767] [2024-06-14 11:26:25,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:25,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:25,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:25,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 549 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:25,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:25,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:25,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:26,122 INFO L124 PetriNetUnfolderBase]: 913/1506 cut-off events. [2024-06-14 11:26:26,122 INFO L125 PetriNetUnfolderBase]: For 6728/6740 co-relation queries the response was YES. [2024-06-14 11:26:26,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6137 conditions, 1506 events. 913/1506 cut-off events. For 6728/6740 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7425 event pairs, 315 based on Foata normal form. 10/1509 useless extension candidates. Maximal degree in co-relation 6099. Up to 1259 conditions per place. [2024-06-14 11:26:26,135 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 63 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-14 11:26:26,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 855 flow [2024-06-14 11:26:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 11:26:26,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 11:26:26,136 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 549 flow. Second operand 6 states and 133 transitions. [2024-06-14 11:26:26,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 855 flow [2024-06-14 11:26:26,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 803 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:26,143 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 599 flow [2024-06-14 11:26:26,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=599, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-14 11:26:26,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 11:26:26,145 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 599 flow [2024-06-14 11:26:26,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:26,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:26,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:26,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:26:26,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:26,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1269484407, now seen corresponding path program 3 times [2024-06-14 11:26:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:26,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785461687] [2024-06-14 11:26:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:26,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785461687] [2024-06-14 11:26:26,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785461687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:26,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:26,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:26,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367813266] [2024-06-14 11:26:26,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:26,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:26,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:26,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:26,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:26,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:26,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:26,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:26,541 INFO L124 PetriNetUnfolderBase]: 908/1487 cut-off events. [2024-06-14 11:26:26,541 INFO L125 PetriNetUnfolderBase]: For 7414/7414 co-relation queries the response was YES. [2024-06-14 11:26:26,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6226 conditions, 1487 events. 908/1487 cut-off events. For 7414/7414 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7211 event pairs, 315 based on Foata normal form. 2/1479 useless extension candidates. Maximal degree in co-relation 6187. Up to 1254 conditions per place. [2024-06-14 11:26:26,557 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 63 selfloop transitions, 29 changer transitions 0/98 dead transitions. [2024-06-14 11:26:26,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 843 flow [2024-06-14 11:26:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:26:26,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 11:26:26,559 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 599 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:26:26,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 843 flow [2024-06-14 11:26:26,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 798 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:26:26,574 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 620 flow [2024-06-14 11:26:26,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=620, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-06-14 11:26:26,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-14 11:26:26,576 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 620 flow [2024-06-14 11:26:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:26,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:26,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:26:26,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:26,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1477445657, now seen corresponding path program 1 times [2024-06-14 11:26:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145045404] [2024-06-14 11:26:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145045404] [2024-06-14 11:26:26,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145045404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:26,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:26,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:26:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277849188] [2024-06-14 11:26:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:26:26,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:26:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:26:26,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:26,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 620 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) [2024-06-14 11:26:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:26,861 INFO L124 PetriNetUnfolderBase]: 843/1406 cut-off events. [2024-06-14 11:26:26,862 INFO L125 PetriNetUnfolderBase]: For 9013/9023 co-relation queries the response was YES. [2024-06-14 11:26:26,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5971 conditions, 1406 events. 843/1406 cut-off events. For 9013/9023 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7192 event pairs, 455 based on Foata normal form. 11/1409 useless extension candidates. Maximal degree in co-relation 5930. Up to 1263 conditions per place. [2024-06-14 11:26:26,869 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 70 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-14 11:26:26,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 854 flow [2024-06-14 11:26:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:26:26,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:26:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 11:26:26,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:26:26,871 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 620 flow. Second operand 4 states and 96 transitions. [2024-06-14 11:26:26,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 854 flow [2024-06-14 11:26:26,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 782 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:26:26,881 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 638 flow [2024-06-14 11:26:26,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=638, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-14 11:26:26,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-14 11:26:26,882 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 638 flow [2024-06-14 11:26:26,882 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) [2024-06-14 11:26:26,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:26,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:26,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:26:26,883 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)] === [2024-06-14 11:26:26,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1429467628, now seen corresponding path program 1 times [2024-06-14 11:26:26,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:26,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239938666] [2024-06-14 11:26:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:27,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:27,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239938666] [2024-06-14 11:26:27,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239938666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:27,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:27,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147425272] [2024-06-14 11:26:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:27,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:27,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:27,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 638 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:27,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:27,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:27,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:27,323 INFO L124 PetriNetUnfolderBase]: 1310/2151 cut-off events. [2024-06-14 11:26:27,323 INFO L125 PetriNetUnfolderBase]: For 14299/14299 co-relation queries the response was YES. [2024-06-14 11:26:27,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9493 conditions, 2151 events. 1310/2151 cut-off events. For 14299/14299 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11518 event pairs, 185 based on Foata normal form. 4/2151 useless extension candidates. Maximal degree in co-relation 9451. Up to 1313 conditions per place. [2024-06-14 11:26:27,337 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 90 selfloop transitions, 47 changer transitions 0/143 dead transitions. [2024-06-14 11:26:27,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 1296 flow [2024-06-14 11:26:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:26:27,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 11:26:27,339 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 638 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:26:27,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 1296 flow [2024-06-14 11:26:27,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 1290 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-14 11:26:27,360 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 934 flow [2024-06-14 11:26:27,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-14 11:26:27,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-14 11:26:27,361 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 934 flow [2024-06-14 11:26:27,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:27,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:27,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:26:27,362 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)] === [2024-06-14 11:26:27,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1514773454, now seen corresponding path program 2 times [2024-06-14 11:26:27,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:27,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641016823] [2024-06-14 11:26:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:27,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:27,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641016823] [2024-06-14 11:26:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641016823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:27,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:27,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857244566] [2024-06-14 11:26:27,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:27,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:27,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 934 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:27,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:27,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:27,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:27,802 INFO L124 PetriNetUnfolderBase]: 1346/2209 cut-off events. [2024-06-14 11:26:27,802 INFO L125 PetriNetUnfolderBase]: For 19418/19420 co-relation queries the response was YES. [2024-06-14 11:26:27,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11093 conditions, 2209 events. 1346/2209 cut-off events. For 19418/19420 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11856 event pairs, 232 based on Foata normal form. 8/2213 useless extension candidates. Maximal degree in co-relation 11045. Up to 1325 conditions per place. [2024-06-14 11:26:27,815 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 80 selfloop transitions, 52 changer transitions 0/138 dead transitions. [2024-06-14 11:26:27,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 138 transitions, 1453 flow [2024-06-14 11:26:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:26:27,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:26:27,816 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 934 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:26:27,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 138 transitions, 1453 flow [2024-06-14 11:26:27,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 1385 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 11:26:27,841 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 1068 flow [2024-06-14 11:26:27,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1068, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-06-14 11:26:27,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-14 11:26:27,842 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 1068 flow [2024-06-14 11:26:27,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:27,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:27,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:27,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:26:27,842 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)] === [2024-06-14 11:26:27,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:27,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1839336788, now seen corresponding path program 3 times [2024-06-14 11:26:27,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:27,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922592926] [2024-06-14 11:26:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:27,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922592926] [2024-06-14 11:26:27,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922592926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:27,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:27,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734333426] [2024-06-14 11:26:27,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:27,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:28,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:28,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 1068 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:28,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:28,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:28,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:28,295 INFO L124 PetriNetUnfolderBase]: 1322/2185 cut-off events. [2024-06-14 11:26:28,295 INFO L125 PetriNetUnfolderBase]: For 21254/21256 co-relation queries the response was YES. [2024-06-14 11:26:28,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 2185 events. 1322/2185 cut-off events. For 21254/21256 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11852 event pairs, 409 based on Foata normal form. 10/2191 useless extension candidates. Maximal degree in co-relation 11260. Up to 1865 conditions per place. [2024-06-14 11:26:28,308 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 87 selfloop transitions, 43 changer transitions 0/136 dead transitions. [2024-06-14 11:26:28,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1526 flow [2024-06-14 11:26:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 11:26:28,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 11:26:28,310 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 1068 flow. Second operand 7 states and 157 transitions. [2024-06-14 11:26:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1526 flow [2024-06-14 11:26:28,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1408 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:28,334 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1170 flow [2024-06-14 11:26:28,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1170, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-14 11:26:28,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-14 11:26:28,335 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1170 flow [2024-06-14 11:26:28,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:28,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:28,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:26:28,335 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)] === [2024-06-14 11:26:28,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1000974640, now seen corresponding path program 4 times [2024-06-14 11:26:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:28,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77050453] [2024-06-14 11:26:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:28,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:28,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77050453] [2024-06-14 11:26:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77050453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:28,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:28,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:28,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945423305] [2024-06-14 11:26:28,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:28,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:28,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:28,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:28,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:28,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:28,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1170 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:28,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:28,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:28,746 INFO L124 PetriNetUnfolderBase]: 1314/2161 cut-off events. [2024-06-14 11:26:28,746 INFO L125 PetriNetUnfolderBase]: For 22816/22818 co-relation queries the response was YES. [2024-06-14 11:26:28,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11296 conditions, 2161 events. 1314/2161 cut-off events. For 22816/22818 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11655 event pairs, 426 based on Foata normal form. 4/2153 useless extension candidates. Maximal degree in co-relation 11243. Up to 1877 conditions per place. [2024-06-14 11:26:28,760 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 100 selfloop transitions, 32 changer transitions 0/138 dead transitions. [2024-06-14 11:26:28,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 1539 flow [2024-06-14 11:26:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:26:28,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 11:26:28,762 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1170 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:26:28,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 1539 flow [2024-06-14 11:26:28,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1455 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:28,790 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 1185 flow [2024-06-14 11:26:28,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1185, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2024-06-14 11:26:28,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 11:26:28,791 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 1185 flow [2024-06-14 11:26:28,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:28,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:28,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:28,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:26:28,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:28,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:28,792 INFO L85 PathProgramCache]: Analyzing trace with hash -347133270, now seen corresponding path program 1 times [2024-06-14 11:26:28,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:28,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747644195] [2024-06-14 11:26:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:28,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:28,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:28,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747644195] [2024-06-14 11:26:28,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747644195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:28,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:28,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:26:28,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88540599] [2024-06-14 11:26:28,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:28,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:26:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:26:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:26:28,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:28,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 1185 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) [2024-06-14 11:26:28,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:28,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:29,112 INFO L124 PetriNetUnfolderBase]: 1228/2088 cut-off events. [2024-06-14 11:26:29,112 INFO L125 PetriNetUnfolderBase]: For 23853/23871 co-relation queries the response was YES. [2024-06-14 11:26:29,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11025 conditions, 2088 events. 1228/2088 cut-off events. For 23853/23871 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11565 event pairs, 401 based on Foata normal form. 9/2081 useless extension candidates. Maximal degree in co-relation 10970. Up to 1814 conditions per place. [2024-06-14 11:26:29,129 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-14 11:26:29,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 1557 flow [2024-06-14 11:26:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:26:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:26:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 11:26:29,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:26:29,131 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 1185 flow. Second operand 5 states and 120 transitions. [2024-06-14 11:26:29,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 1557 flow [2024-06-14 11:26:29,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 134 transitions, 1476 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:26:29,157 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1246 flow [2024-06-14 11:26:29,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1246, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2024-06-14 11:26:29,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-14 11:26:29,158 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1246 flow [2024-06-14 11:26:29,158 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) [2024-06-14 11:26:29,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:29,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:29,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:26:29,159 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)] === [2024-06-14 11:26:29,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:29,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1597819296, now seen corresponding path program 1 times [2024-06-14 11:26:29,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:29,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155933276] [2024-06-14 11:26:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:29,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155933276] [2024-06-14 11:26:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155933276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:29,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:29,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013389398] [2024-06-14 11:26:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:29,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:29,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:29,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 1246 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:29,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:29,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:29,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:29,667 INFO L124 PetriNetUnfolderBase]: 1389/2319 cut-off events. [2024-06-14 11:26:29,667 INFO L125 PetriNetUnfolderBase]: For 31097/31104 co-relation queries the response was YES. [2024-06-14 11:26:29,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12458 conditions, 2319 events. 1389/2319 cut-off events. For 31097/31104 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12804 event pairs, 291 based on Foata normal form. 36/2353 useless extension candidates. Maximal degree in co-relation 12402. Up to 1502 conditions per place. [2024-06-14 11:26:29,684 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 112 selfloop transitions, 44 changer transitions 0/162 dead transitions. [2024-06-14 11:26:29,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1816 flow [2024-06-14 11:26:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 11:26:29,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 11:26:29,685 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1246 flow. Second operand 8 states and 181 transitions. [2024-06-14 11:26:29,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1816 flow [2024-06-14 11:26:29,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1766 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-14 11:26:29,759 INFO L231 Difference]: Finished difference. Result has 112 places, 125 transitions, 1360 flow [2024-06-14 11:26:29,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=112, PETRI_TRANSITIONS=125} [2024-06-14 11:26:29,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-14 11:26:29,759 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 125 transitions, 1360 flow [2024-06-14 11:26:29,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:29,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:29,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:29,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:26:29,759 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)] === [2024-06-14 11:26:29,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1553132810, now seen corresponding path program 2 times [2024-06-14 11:26:29,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:29,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737271639] [2024-06-14 11:26:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:29,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:29,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:29,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737271639] [2024-06-14 11:26:29,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737271639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:29,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:29,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620740519] [2024-06-14 11:26:29,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:29,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:29,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:29,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 125 transitions, 1360 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:29,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:29,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:29,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:30,224 INFO L124 PetriNetUnfolderBase]: 1325/2226 cut-off events. [2024-06-14 11:26:30,224 INFO L125 PetriNetUnfolderBase]: For 30436/30443 co-relation queries the response was YES. [2024-06-14 11:26:30,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11869 conditions, 2226 events. 1325/2226 cut-off events. For 30436/30443 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12294 event pairs, 386 based on Foata normal form. 38/2262 useless extension candidates. Maximal degree in co-relation 11809. Up to 1810 conditions per place. [2024-06-14 11:26:30,240 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 119 selfloop transitions, 32 changer transitions 0/157 dead transitions. [2024-06-14 11:26:30,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 157 transitions, 1806 flow [2024-06-14 11:26:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 11:26:30,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 11:26:30,242 INFO L175 Difference]: Start difference. First operand has 112 places, 125 transitions, 1360 flow. Second operand 8 states and 175 transitions. [2024-06-14 11:26:30,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 157 transitions, 1806 flow [2024-06-14 11:26:30,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 157 transitions, 1732 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:30,285 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1403 flow [2024-06-14 11:26:30,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2024-06-14 11:26:30,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 11:26:30,286 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1403 flow [2024-06-14 11:26:30,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:30,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:30,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:30,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:26:30,287 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:30,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1505574932, now seen corresponding path program 3 times [2024-06-14 11:26:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:30,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205989668] [2024-06-14 11:26:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:30,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:30,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205989668] [2024-06-14 11:26:30,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205989668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:30,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:30,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:30,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191239148] [2024-06-14 11:26:30,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:30,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:30,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:30,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:30,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:30,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1403 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:30,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:30,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:30,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:30,735 INFO L124 PetriNetUnfolderBase]: 1383/2323 cut-off events. [2024-06-14 11:26:30,735 INFO L125 PetriNetUnfolderBase]: For 30961/30975 co-relation queries the response was YES. [2024-06-14 11:26:30,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12328 conditions, 2323 events. 1383/2323 cut-off events. For 30961/30975 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13037 event pairs, 418 based on Foata normal form. 24/2340 useless extension candidates. Maximal degree in co-relation 12266. Up to 1932 conditions per place. [2024-06-14 11:26:30,751 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 28 changer transitions 0/154 dead transitions. [2024-06-14 11:26:30,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1816 flow [2024-06-14 11:26:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:26:30,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:26:30,753 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1403 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:26:30,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1816 flow [2024-06-14 11:26:30,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 154 transitions, 1751 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:30,793 INFO L231 Difference]: Finished difference. Result has 117 places, 128 transitions, 1417 flow [2024-06-14 11:26:30,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1417, PETRI_PLACES=117, PETRI_TRANSITIONS=128} [2024-06-14 11:26:30,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-14 11:26:30,794 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 128 transitions, 1417 flow [2024-06-14 11:26:30,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:30,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:30,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:30,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:26:30,795 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)] === [2024-06-14 11:26:30,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:30,795 INFO L85 PathProgramCache]: Analyzing trace with hash -851463042, now seen corresponding path program 4 times [2024-06-14 11:26:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:30,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095086364] [2024-06-14 11:26:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:30,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:30,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:30,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095086364] [2024-06-14 11:26:30,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095086364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:30,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:30,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:30,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577709996] [2024-06-14 11:26:30,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:30,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:30,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:31,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:31,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 128 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:31,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:31,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:31,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:31,281 INFO L124 PetriNetUnfolderBase]: 1441/2419 cut-off events. [2024-06-14 11:26:31,281 INFO L125 PetriNetUnfolderBase]: For 33409/33411 co-relation queries the response was YES. [2024-06-14 11:26:31,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12837 conditions, 2419 events. 1441/2419 cut-off events. For 33409/33411 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13711 event pairs, 433 based on Foata normal form. 16/2425 useless extension candidates. Maximal degree in co-relation 12774. Up to 2030 conditions per place. [2024-06-14 11:26:31,297 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 31 changer transitions 0/159 dead transitions. [2024-06-14 11:26:31,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 1854 flow [2024-06-14 11:26:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:26:31,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:26:31,298 INFO L175 Difference]: Start difference. First operand has 117 places, 128 transitions, 1417 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:26:31,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 1854 flow [2024-06-14 11:26:31,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 159 transitions, 1793 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:26:31,342 INFO L231 Difference]: Finished difference. Result has 120 places, 129 transitions, 1443 flow [2024-06-14 11:26:31,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=120, PETRI_TRANSITIONS=129} [2024-06-14 11:26:31,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-14 11:26:31,343 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 129 transitions, 1443 flow [2024-06-14 11:26:31,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:31,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:31,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:31,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:26:31,343 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)] === [2024-06-14 11:26:31,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1728580554, now seen corresponding path program 5 times [2024-06-14 11:26:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304793325] [2024-06-14 11:26:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:31,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:31,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:31,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304793325] [2024-06-14 11:26:31,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304793325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:31,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:31,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:31,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225945028] [2024-06-14 11:26:31,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:31,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:31,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:31,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 1443 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:31,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:31,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:31,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:31,849 INFO L124 PetriNetUnfolderBase]: 1457/2451 cut-off events. [2024-06-14 11:26:31,849 INFO L125 PetriNetUnfolderBase]: For 34647/34649 co-relation queries the response was YES. [2024-06-14 11:26:31,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12985 conditions, 2451 events. 1457/2451 cut-off events. For 34647/34649 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13949 event pairs, 426 based on Foata normal form. 12/2453 useless extension candidates. Maximal degree in co-relation 12921. Up to 1975 conditions per place. [2024-06-14 11:26:31,865 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 127 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-14 11:26:31,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 1926 flow [2024-06-14 11:26:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 11:26:31,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 11:26:31,868 INFO L175 Difference]: Start difference. First operand has 120 places, 129 transitions, 1443 flow. Second operand 9 states and 192 transitions. [2024-06-14 11:26:31,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 1926 flow [2024-06-14 11:26:31,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 167 transitions, 1857 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:31,910 INFO L231 Difference]: Finished difference. Result has 123 places, 130 transitions, 1468 flow [2024-06-14 11:26:31,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1468, PETRI_PLACES=123, PETRI_TRANSITIONS=130} [2024-06-14 11:26:31,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 11:26:31,911 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 130 transitions, 1468 flow [2024-06-14 11:26:31,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:31,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:31,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:31,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:26:31,912 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:31,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:31,912 INFO L85 PathProgramCache]: Analyzing trace with hash -70127820, now seen corresponding path program 1 times [2024-06-14 11:26:31,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:31,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083688814] [2024-06-14 11:26:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:31,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:32,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:32,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083688814] [2024-06-14 11:26:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083688814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:32,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:32,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:32,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244113088] [2024-06-14 11:26:32,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:32,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:32,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:32,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:32,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:32,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 130 transitions, 1468 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:32,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:32,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:32,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:32,395 INFO L124 PetriNetUnfolderBase]: 1437/2428 cut-off events. [2024-06-14 11:26:32,395 INFO L125 PetriNetUnfolderBase]: For 35145/35159 co-relation queries the response was YES. [2024-06-14 11:26:32,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12729 conditions, 2428 events. 1437/2428 cut-off events. For 35145/35159 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13824 event pairs, 376 based on Foata normal form. 20/2441 useless extension candidates. Maximal degree in co-relation 12664. Up to 1649 conditions per place. [2024-06-14 11:26:32,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-14 11:26:32,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 161 transitions, 1875 flow [2024-06-14 11:26:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 11:26:32,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:26:32,412 INFO L175 Difference]: Start difference. First operand has 123 places, 130 transitions, 1468 flow. Second operand 7 states and 154 transitions. [2024-06-14 11:26:32,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 161 transitions, 1875 flow [2024-06-14 11:26:32,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 161 transitions, 1795 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 11:26:32,455 INFO L231 Difference]: Finished difference. Result has 122 places, 129 transitions, 1425 flow [2024-06-14 11:26:32,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1425, PETRI_PLACES=122, PETRI_TRANSITIONS=129} [2024-06-14 11:26:32,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-14 11:26:32,455 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 129 transitions, 1425 flow [2024-06-14 11:26:32,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:32,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:26:32,456 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)] === [2024-06-14 11:26:32,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1217608856, now seen corresponding path program 1 times [2024-06-14 11:26:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:32,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721913754] [2024-06-14 11:26:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:32,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:32,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:32,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721913754] [2024-06-14 11:26:32,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721913754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:32,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:32,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372481338] [2024-06-14 11:26:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:32,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:32,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:32,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:32,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 129 transitions, 1425 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:32,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:32,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:32,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:32,957 INFO L124 PetriNetUnfolderBase]: 1435/2448 cut-off events. [2024-06-14 11:26:32,957 INFO L125 PetriNetUnfolderBase]: For 35550/35558 co-relation queries the response was YES. [2024-06-14 11:26:32,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12999 conditions, 2448 events. 1435/2448 cut-off events. For 35550/35558 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14128 event pairs, 400 based on Foata normal form. 7/2443 useless extension candidates. Maximal degree in co-relation 12933. Up to 2122 conditions per place. [2024-06-14 11:26:32,972 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 37 changer transitions 0/161 dead transitions. [2024-06-14 11:26:32,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 161 transitions, 1981 flow [2024-06-14 11:26:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 11:26:32,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-14 11:26:32,973 INFO L175 Difference]: Start difference. First operand has 122 places, 129 transitions, 1425 flow. Second operand 7 states and 151 transitions. [2024-06-14 11:26:32,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 161 transitions, 1981 flow [2024-06-14 11:26:33,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 161 transitions, 1907 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:33,016 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1662 flow [2024-06-14 11:26:33,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1662, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-14 11:26:33,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-14 11:26:33,017 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1662 flow [2024-06-14 11:26:33,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:33,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:33,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:33,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:26:33,017 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:33,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1796539398, now seen corresponding path program 2 times [2024-06-14 11:26:33,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:33,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410612070] [2024-06-14 11:26:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:33,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:33,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410612070] [2024-06-14 11:26:33,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410612070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:33,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:33,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927565786] [2024-06-14 11:26:33,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:33,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:33,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:33,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:33,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:33,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:33,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1662 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) [2024-06-14 11:26:33,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:33,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:33,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:33,422 INFO L124 PetriNetUnfolderBase]: 1427/2433 cut-off events. [2024-06-14 11:26:33,422 INFO L125 PetriNetUnfolderBase]: For 37379/37390 co-relation queries the response was YES. [2024-06-14 11:26:33,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13181 conditions, 2433 events. 1427/2433 cut-off events. For 37379/37390 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14080 event pairs, 409 based on Foata normal form. 5/2422 useless extension candidates. Maximal degree in co-relation 13112. Up to 2117 conditions per place. [2024-06-14 11:26:33,438 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 106 selfloop transitions, 29 changer transitions 0/154 dead transitions. [2024-06-14 11:26:33,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 154 transitions, 1954 flow [2024-06-14 11:26:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:26:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:26:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-14 11:26:33,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 11:26:33,441 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1662 flow. Second operand 4 states and 97 transitions. [2024-06-14 11:26:33,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 154 transitions, 1954 flow [2024-06-14 11:26:33,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1922 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 11:26:33,489 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1704 flow [2024-06-14 11:26:33,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1704, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-14 11:26:33,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 11:26:33,490 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1704 flow [2024-06-14 11:26:33,490 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) [2024-06-14 11:26:33,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:33,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:33,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:26:33,490 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:33,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash -133447772, now seen corresponding path program 3 times [2024-06-14 11:26:33,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:33,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515023403] [2024-06-14 11:26:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515023403] [2024-06-14 11:26:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515023403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:33,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795909934] [2024-06-14 11:26:33,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:33,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:33,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:33,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:33,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:33,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1704 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) [2024-06-14 11:26:33,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:33,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:33,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:33,851 INFO L124 PetriNetUnfolderBase]: 1421/2424 cut-off events. [2024-06-14 11:26:33,852 INFO L125 PetriNetUnfolderBase]: For 39661/39668 co-relation queries the response was YES. [2024-06-14 11:26:33,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13265 conditions, 2424 events. 1421/2424 cut-off events. For 39661/39668 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13978 event pairs, 408 based on Foata normal form. 6/2414 useless extension candidates. Maximal degree in co-relation 13193. Up to 2107 conditions per place. [2024-06-14 11:26:33,870 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 107 selfloop transitions, 32 changer transitions 0/158 dead transitions. [2024-06-14 11:26:33,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 158 transitions, 2032 flow [2024-06-14 11:26:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:26:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:26:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 11:26:33,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:26:33,872 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1704 flow. Second operand 5 states and 115 transitions. [2024-06-14 11:26:33,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 158 transitions, 2032 flow [2024-06-14 11:26:33,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 158 transitions, 1963 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:33,922 INFO L231 Difference]: Finished difference. Result has 132 places, 150 transitions, 1737 flow [2024-06-14 11:26:33,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1737, PETRI_PLACES=132, PETRI_TRANSITIONS=150} [2024-06-14 11:26:33,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-14 11:26:33,923 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 150 transitions, 1737 flow [2024-06-14 11:26:33,923 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) [2024-06-14 11:26:33,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:33,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:33,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:26:33,923 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:33,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-14 11:26:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:33,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118821557] [2024-06-14 11:26:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:33,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:34,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118821557] [2024-06-14 11:26:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118821557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:34,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:34,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:26:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553361425] [2024-06-14 11:26:34,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:34,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:26:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:26:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:26:34,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:34,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 150 transitions, 1737 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:34,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:34,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:34,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:34,290 INFO L124 PetriNetUnfolderBase]: 1410/2435 cut-off events. [2024-06-14 11:26:34,290 INFO L125 PetriNetUnfolderBase]: For 39709/39730 co-relation queries the response was YES. [2024-06-14 11:26:34,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13504 conditions, 2435 events. 1410/2435 cut-off events. For 39709/39730 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14150 event pairs, 405 based on Foata normal form. 17/2434 useless extension candidates. Maximal degree in co-relation 13432. Up to 2113 conditions per place. [2024-06-14 11:26:34,307 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 129 selfloop transitions, 26 changer transitions 0/167 dead transitions. [2024-06-14 11:26:34,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 167 transitions, 2180 flow [2024-06-14 11:26:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:26:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:26:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 11:26:34,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-14 11:26:34,308 INFO L175 Difference]: Start difference. First operand has 132 places, 150 transitions, 1737 flow. Second operand 5 states and 119 transitions. [2024-06-14 11:26:34,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 167 transitions, 2180 flow [2024-06-14 11:26:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 167 transitions, 2100 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:34,359 INFO L231 Difference]: Finished difference. Result has 134 places, 153 transitions, 1748 flow [2024-06-14 11:26:34,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1748, PETRI_PLACES=134, PETRI_TRANSITIONS=153} [2024-06-14 11:26:34,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 11:26:34,360 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 153 transitions, 1748 flow [2024-06-14 11:26:34,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:34,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:34,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:34,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:26:34,360 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)] === [2024-06-14 11:26:34,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1449518836, now seen corresponding path program 2 times [2024-06-14 11:26:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:34,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574122909] [2024-06-14 11:26:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:34,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:34,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574122909] [2024-06-14 11:26:34,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574122909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:34,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:34,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624908744] [2024-06-14 11:26:34,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:34,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:34,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:34,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:34,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 153 transitions, 1748 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) [2024-06-14 11:26:34,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:34,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:34,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:34,760 INFO L124 PetriNetUnfolderBase]: 1409/2423 cut-off events. [2024-06-14 11:26:34,760 INFO L125 PetriNetUnfolderBase]: For 40873/40892 co-relation queries the response was YES. [2024-06-14 11:26:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13510 conditions, 2423 events. 1409/2423 cut-off events. For 40873/40892 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14021 event pairs, 407 based on Foata normal form. 10/2413 useless extension candidates. Maximal degree in co-relation 13437. Up to 2108 conditions per place. [2024-06-14 11:26:34,777 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 124 selfloop transitions, 32 changer transitions 0/168 dead transitions. [2024-06-14 11:26:34,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 168 transitions, 2164 flow [2024-06-14 11:26:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:26:34,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:26:34,779 INFO L175 Difference]: Start difference. First operand has 134 places, 153 transitions, 1748 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:26:34,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 168 transitions, 2164 flow [2024-06-14 11:26:34,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 2080 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:34,834 INFO L231 Difference]: Finished difference. Result has 137 places, 153 transitions, 1734 flow [2024-06-14 11:26:34,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1734, PETRI_PLACES=137, PETRI_TRANSITIONS=153} [2024-06-14 11:26:34,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-14 11:26:34,835 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 153 transitions, 1734 flow [2024-06-14 11:26:34,835 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) [2024-06-14 11:26:34,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:34,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:34,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:26:34,835 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:34,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1631556840, now seen corresponding path program 1 times [2024-06-14 11:26:34,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:34,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786048463] [2024-06-14 11:26:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:34,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:34,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:34,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786048463] [2024-06-14 11:26:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786048463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:34,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:34,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525060644] [2024-06-14 11:26:34,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:34,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:34,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:34,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:34,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:34,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:34,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 153 transitions, 1734 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) [2024-06-14 11:26:34,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:34,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:34,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:35,221 INFO L124 PetriNetUnfolderBase]: 1494/2521 cut-off events. [2024-06-14 11:26:35,221 INFO L125 PetriNetUnfolderBase]: For 44525/44527 co-relation queries the response was YES. [2024-06-14 11:26:35,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14124 conditions, 2521 events. 1494/2521 cut-off events. For 44525/44527 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14386 event pairs, 733 based on Foata normal form. 1/2519 useless extension candidates. Maximal degree in co-relation 14051. Up to 2263 conditions per place. [2024-06-14 11:26:35,238 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 28 changer transitions 0/192 dead transitions. [2024-06-14 11:26:35,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 192 transitions, 2564 flow [2024-06-14 11:26:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:26:35,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:26:35,239 INFO L175 Difference]: Start difference. First operand has 137 places, 153 transitions, 1734 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:26:35,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 192 transitions, 2564 flow [2024-06-14 11:26:35,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 192 transitions, 2482 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:35,300 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 2019 flow [2024-06-14 11:26:35,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2019, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2024-06-14 11:26:35,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 11:26:35,300 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 2019 flow [2024-06-14 11:26:35,300 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) [2024-06-14 11:26:35,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:35,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:35,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:26:35,301 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:35,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:35,301 INFO L85 PathProgramCache]: Analyzing trace with hash -133441820, now seen corresponding path program 2 times [2024-06-14 11:26:35,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:35,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520829994] [2024-06-14 11:26:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:35,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:35,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:35,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520829994] [2024-06-14 11:26:35,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520829994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:35,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:35,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:35,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867097510] [2024-06-14 11:26:35,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:35,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:35,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:35,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 2019 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) [2024-06-14 11:26:35,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:35,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:35,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:35,680 INFO L124 PetriNetUnfolderBase]: 1507/2547 cut-off events. [2024-06-14 11:26:35,681 INFO L125 PetriNetUnfolderBase]: For 49091/49093 co-relation queries the response was YES. [2024-06-14 11:26:35,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14736 conditions, 2547 events. 1507/2547 cut-off events. For 49091/49093 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14597 event pairs, 726 based on Foata normal form. 1/2547 useless extension candidates. Maximal degree in co-relation 14658. Up to 2296 conditions per place. [2024-06-14 11:26:35,698 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 26 changer transitions 0/199 dead transitions. [2024-06-14 11:26:35,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 2711 flow [2024-06-14 11:26:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 11:26:35,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-14 11:26:35,699 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 2019 flow. Second operand 7 states and 151 transitions. [2024-06-14 11:26:35,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 2711 flow [2024-06-14 11:26:35,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 199 transitions, 2657 flow, removed 27 selfloop flow, removed 0 redundant places. [2024-06-14 11:26:35,804 INFO L231 Difference]: Finished difference. Result has 152 places, 183 transitions, 2196 flow [2024-06-14 11:26:35,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2196, PETRI_PLACES=152, PETRI_TRANSITIONS=183} [2024-06-14 11:26:35,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 11:26:35,805 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 183 transitions, 2196 flow [2024-06-14 11:26:35,805 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) [2024-06-14 11:26:35,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:35,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:35,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:26:35,805 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:35,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash -119379290, now seen corresponding path program 3 times [2024-06-14 11:26:35,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:35,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943344801] [2024-06-14 11:26:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:35,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:35,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:35,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943344801] [2024-06-14 11:26:35,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943344801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:35,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:35,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:35,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054671853] [2024-06-14 11:26:35,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:35,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:35,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:35,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:35,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 183 transitions, 2196 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) [2024-06-14 11:26:35,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:35,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:35,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:36,218 INFO L124 PetriNetUnfolderBase]: 1504/2543 cut-off events. [2024-06-14 11:26:36,218 INFO L125 PetriNetUnfolderBase]: For 51582/51584 co-relation queries the response was YES. [2024-06-14 11:26:36,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14820 conditions, 2543 events. 1504/2543 cut-off events. For 51582/51584 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14559 event pairs, 727 based on Foata normal form. 1/2543 useless extension candidates. Maximal degree in co-relation 14737. Up to 2294 conditions per place. [2024-06-14 11:26:36,238 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2024-06-14 11:26:36,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 200 transitions, 2705 flow [2024-06-14 11:26:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 11:26:36,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:26:36,239 INFO L175 Difference]: Start difference. First operand has 152 places, 183 transitions, 2196 flow. Second operand 6 states and 138 transitions. [2024-06-14 11:26:36,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 200 transitions, 2705 flow [2024-06-14 11:26:36,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 200 transitions, 2627 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:36,319 INFO L231 Difference]: Finished difference. Result has 155 places, 183 transitions, 2178 flow [2024-06-14 11:26:36,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2178, PETRI_PLACES=155, PETRI_TRANSITIONS=183} [2024-06-14 11:26:36,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 11:26:36,319 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 183 transitions, 2178 flow [2024-06-14 11:26:36,320 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) [2024-06-14 11:26:36,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:36,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:36,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:26:36,320 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:36,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:36,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1536474596, now seen corresponding path program 3 times [2024-06-14 11:26:36,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:36,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106179543] [2024-06-14 11:26:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:36,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:36,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106179543] [2024-06-14 11:26:36,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106179543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:36,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:36,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:26:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277478698] [2024-06-14 11:26:36,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:26:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:26:36,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:26:36,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:36,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 183 transitions, 2178 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:36,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:36,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:36,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:36,755 INFO L124 PetriNetUnfolderBase]: 1443/2468 cut-off events. [2024-06-14 11:26:36,755 INFO L125 PetriNetUnfolderBase]: For 52016/52030 co-relation queries the response was YES. [2024-06-14 11:26:36,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14344 conditions, 2468 events. 1443/2468 cut-off events. For 52016/52030 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14241 event pairs, 407 based on Foata normal form. 6/2454 useless extension candidates. Maximal degree in co-relation 14260. Up to 2069 conditions per place. [2024-06-14 11:26:36,776 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 125 selfloop transitions, 52 changer transitions 0/197 dead transitions. [2024-06-14 11:26:36,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 197 transitions, 2580 flow [2024-06-14 11:26:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:26:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:26:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 11:26:36,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 11:26:36,777 INFO L175 Difference]: Start difference. First operand has 155 places, 183 transitions, 2178 flow. Second operand 5 states and 124 transitions. [2024-06-14 11:26:36,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 197 transitions, 2580 flow [2024-06-14 11:26:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 197 transitions, 2523 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:36,861 INFO L231 Difference]: Finished difference. Result has 157 places, 183 transitions, 2249 flow [2024-06-14 11:26:36,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2249, PETRI_PLACES=157, PETRI_TRANSITIONS=183} [2024-06-14 11:26:36,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-14 11:26:36,861 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 183 transitions, 2249 flow [2024-06-14 11:26:36,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:36,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:36,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:36,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:26:36,862 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)] === [2024-06-14 11:26:36,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-14 11:26:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:36,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278999120] [2024-06-14 11:26:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:36,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:36,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278999120] [2024-06-14 11:26:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278999120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:36,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:36,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:36,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648189651] [2024-06-14 11:26:36,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:36,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:36,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:37,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:37,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 183 transitions, 2249 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) [2024-06-14 11:26:37,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:37,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:37,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:37,299 INFO L124 PetriNetUnfolderBase]: 1429/2429 cut-off events. [2024-06-14 11:26:37,300 INFO L125 PetriNetUnfolderBase]: For 56195/56207 co-relation queries the response was YES. [2024-06-14 11:26:37,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14414 conditions, 2429 events. 1429/2429 cut-off events. For 56195/56207 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14056 event pairs, 704 based on Foata normal form. 12/2430 useless extension candidates. Maximal degree in co-relation 14329. Up to 2162 conditions per place. [2024-06-14 11:26:37,317 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 163 selfloop transitions, 12 changer transitions 0/195 dead transitions. [2024-06-14 11:26:37,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 195 transitions, 2658 flow [2024-06-14 11:26:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:26:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:26:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-14 11:26:37,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 11:26:37,318 INFO L175 Difference]: Start difference. First operand has 157 places, 183 transitions, 2249 flow. Second operand 5 states and 113 transitions. [2024-06-14 11:26:37,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 195 transitions, 2658 flow [2024-06-14 11:26:37,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 195 transitions, 2535 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:37,397 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 2179 flow [2024-06-14 11:26:37,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2179, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-14 11:26:37,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-14 11:26:37,397 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 2179 flow [2024-06-14 11:26:37,397 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) [2024-06-14 11:26:37,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:37,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:37,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:26:37,398 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:37,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash -965069260, now seen corresponding path program 1 times [2024-06-14 11:26:37,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:37,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27624343] [2024-06-14 11:26:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:37,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:37,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27624343] [2024-06-14 11:26:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27624343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:37,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276039082] [2024-06-14 11:26:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:37,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:37,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:37,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:37,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 2179 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) [2024-06-14 11:26:37,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:37,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:37,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:37,781 INFO L124 PetriNetUnfolderBase]: 1498/2522 cut-off events. [2024-06-14 11:26:37,781 INFO L125 PetriNetUnfolderBase]: For 52706/52717 co-relation queries the response was YES. [2024-06-14 11:26:37,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14760 conditions, 2522 events. 1498/2522 cut-off events. For 52706/52717 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14383 event pairs, 736 based on Foata normal form. 7/2527 useless extension candidates. Maximal degree in co-relation 14676. Up to 2267 conditions per place. [2024-06-14 11:26:37,796 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 162 selfloop transitions, 37 changer transitions 0/205 dead transitions. [2024-06-14 11:26:37,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 205 transitions, 2752 flow [2024-06-14 11:26:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:26:37,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 11:26:37,797 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 2179 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:26:37,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 205 transitions, 2752 flow [2024-06-14 11:26:37,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 205 transitions, 2715 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:37,872 INFO L231 Difference]: Finished difference. Result has 160 places, 190 transitions, 2285 flow [2024-06-14 11:26:37,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2285, PETRI_PLACES=160, PETRI_TRANSITIONS=190} [2024-06-14 11:26:37,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-14 11:26:37,872 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 190 transitions, 2285 flow [2024-06-14 11:26:37,873 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) [2024-06-14 11:26:37,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:37,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:26:37,873 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:37,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1985404288, now seen corresponding path program 2 times [2024-06-14 11:26:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194718633] [2024-06-14 11:26:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:37,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194718633] [2024-06-14 11:26:37,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194718633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:37,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:37,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317739398] [2024-06-14 11:26:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:37,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:37,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:38,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:38,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 190 transitions, 2285 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) [2024-06-14 11:26:38,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:38,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:38,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:38,300 INFO L124 PetriNetUnfolderBase]: 1503/2527 cut-off events. [2024-06-14 11:26:38,300 INFO L125 PetriNetUnfolderBase]: For 55286/55288 co-relation queries the response was YES. [2024-06-14 11:26:38,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14959 conditions, 2527 events. 1503/2527 cut-off events. For 55286/55288 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14373 event pairs, 735 based on Foata normal form. 1/2525 useless extension candidates. Maximal degree in co-relation 14873. Up to 2273 conditions per place. [2024-06-14 11:26:38,318 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 45 changer transitions 0/213 dead transitions. [2024-06-14 11:26:38,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 213 transitions, 2945 flow [2024-06-14 11:26:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 11:26:38,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 11:26:38,319 INFO L175 Difference]: Start difference. First operand has 160 places, 190 transitions, 2285 flow. Second operand 9 states and 186 transitions. [2024-06-14 11:26:38,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 213 transitions, 2945 flow [2024-06-14 11:26:38,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 213 transitions, 2818 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:38,402 INFO L231 Difference]: Finished difference. Result has 167 places, 195 transitions, 2325 flow [2024-06-14 11:26:38,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2325, PETRI_PLACES=167, PETRI_TRANSITIONS=195} [2024-06-14 11:26:38,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-14 11:26:38,402 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 195 transitions, 2325 flow [2024-06-14 11:26:38,403 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) [2024-06-14 11:26:38,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:38,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:38,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:26:38,403 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:38,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash -961350190, now seen corresponding path program 3 times [2024-06-14 11:26:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:38,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584479859] [2024-06-14 11:26:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:38,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:38,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584479859] [2024-06-14 11:26:38,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584479859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:38,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:38,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702903178] [2024-06-14 11:26:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:38,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:38,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:38,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:38,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 195 transitions, 2325 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) [2024-06-14 11:26:38,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:38,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:38,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:38,811 INFO L124 PetriNetUnfolderBase]: 1500/2523 cut-off events. [2024-06-14 11:26:38,811 INFO L125 PetriNetUnfolderBase]: For 57342/57344 co-relation queries the response was YES. [2024-06-14 11:26:38,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 2523 events. 1500/2523 cut-off events. For 57342/57344 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14359 event pairs, 735 based on Foata normal form. 1/2521 useless extension candidates. Maximal degree in co-relation 14894. Up to 2270 conditions per place. [2024-06-14 11:26:38,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 44 changer transitions 0/210 dead transitions. [2024-06-14 11:26:38,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 210 transitions, 2850 flow [2024-06-14 11:26:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 11:26:38,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 11:26:38,863 INFO L175 Difference]: Start difference. First operand has 167 places, 195 transitions, 2325 flow. Second operand 7 states and 153 transitions. [2024-06-14 11:26:38,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 210 transitions, 2850 flow [2024-06-14 11:26:38,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2680 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 11:26:38,941 INFO L231 Difference]: Finished difference. Result has 166 places, 195 transitions, 2249 flow [2024-06-14 11:26:38,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2249, PETRI_PLACES=166, PETRI_TRANSITIONS=195} [2024-06-14 11:26:38,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 11:26:38,942 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 195 transitions, 2249 flow [2024-06-14 11:26:38,942 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) [2024-06-14 11:26:38,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:38,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:38,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:26:38,942 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)] === [2024-06-14 11:26:38,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:38,943 INFO L85 PathProgramCache]: Analyzing trace with hash 158271778, now seen corresponding path program 4 times [2024-06-14 11:26:38,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:38,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135450461] [2024-06-14 11:26:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:38,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135450461] [2024-06-14 11:26:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135450461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:39,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:39,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:39,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68726186] [2024-06-14 11:26:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:39,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:39,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:39,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 195 transitions, 2249 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) [2024-06-14 11:26:39,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:39,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:39,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:39,335 INFO L124 PetriNetUnfolderBase]: 1505/2535 cut-off events. [2024-06-14 11:26:39,335 INFO L125 PetriNetUnfolderBase]: For 59812/59814 co-relation queries the response was YES. [2024-06-14 11:26:39,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14994 conditions, 2535 events. 1505/2535 cut-off events. For 59812/59814 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14446 event pairs, 726 based on Foata normal form. 1/2535 useless extension candidates. Maximal degree in co-relation 14908. Up to 2297 conditions per place. [2024-06-14 11:26:39,353 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 30 changer transitions 0/213 dead transitions. [2024-06-14 11:26:39,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 213 transitions, 2810 flow [2024-06-14 11:26:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:26:39,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 11:26:39,354 INFO L175 Difference]: Start difference. First operand has 166 places, 195 transitions, 2249 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:26:39,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 213 transitions, 2810 flow [2024-06-14 11:26:39,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 213 transitions, 2716 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:39,437 INFO L231 Difference]: Finished difference. Result has 167 places, 198 transitions, 2250 flow [2024-06-14 11:26:39,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2250, PETRI_PLACES=167, PETRI_TRANSITIONS=198} [2024-06-14 11:26:39,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-14 11:26:39,437 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 198 transitions, 2250 flow [2024-06-14 11:26:39,437 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) [2024-06-14 11:26:39,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:39,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:39,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:26:39,438 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)] === [2024-06-14 11:26:39,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:39,438 INFO L85 PathProgramCache]: Analyzing trace with hash -386071132, now seen corresponding path program 5 times [2024-06-14 11:26:39,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:39,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097697496] [2024-06-14 11:26:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:39,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:39,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:39,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097697496] [2024-06-14 11:26:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097697496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:39,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:39,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128869764] [2024-06-14 11:26:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:39,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:39,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 198 transitions, 2250 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) [2024-06-14 11:26:39,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:39,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:39,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:39,827 INFO L124 PetriNetUnfolderBase]: 1502/2531 cut-off events. [2024-06-14 11:26:39,827 INFO L125 PetriNetUnfolderBase]: For 62192/62194 co-relation queries the response was YES. [2024-06-14 11:26:39,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15003 conditions, 2531 events. 1502/2531 cut-off events. For 62192/62194 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14419 event pairs, 727 based on Foata normal form. 1/2531 useless extension candidates. Maximal degree in co-relation 14916. Up to 2294 conditions per place. [2024-06-14 11:26:39,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 30 changer transitions 0/214 dead transitions. [2024-06-14 11:26:39,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 214 transitions, 2729 flow [2024-06-14 11:26:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:26:39,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:26:39,847 INFO L175 Difference]: Start difference. First operand has 167 places, 198 transitions, 2250 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:26:39,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 214 transitions, 2729 flow [2024-06-14 11:26:39,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 214 transitions, 2688 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:39,938 INFO L231 Difference]: Finished difference. Result has 170 places, 198 transitions, 2275 flow [2024-06-14 11:26:39,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2275, PETRI_PLACES=170, PETRI_TRANSITIONS=198} [2024-06-14 11:26:39,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-14 11:26:39,939 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 198 transitions, 2275 flow [2024-06-14 11:26:39,939 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) [2024-06-14 11:26:39,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:39,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:39,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:26:39,939 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)] === [2024-06-14 11:26:39,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1829127531, now seen corresponding path program 1 times [2024-06-14 11:26:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:39,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342791336] [2024-06-14 11:26:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:39,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:40,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:40,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342791336] [2024-06-14 11:26:40,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342791336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:40,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:40,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:40,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290823244] [2024-06-14 11:26:40,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:40,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:40,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:40,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:40,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 198 transitions, 2275 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:40,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:40,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:40,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:40,472 INFO L124 PetriNetUnfolderBase]: 1515/2551 cut-off events. [2024-06-14 11:26:40,472 INFO L125 PetriNetUnfolderBase]: For 65412/65414 co-relation queries the response was YES. [2024-06-14 11:26:40,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15268 conditions, 2551 events. 1515/2551 cut-off events. For 65412/65414 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14465 event pairs, 413 based on Foata normal form. 1/2546 useless extension candidates. Maximal degree in co-relation 15180. Up to 2156 conditions per place. [2024-06-14 11:26:40,491 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 142 selfloop transitions, 73 changer transitions 0/221 dead transitions. [2024-06-14 11:26:40,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 221 transitions, 2907 flow [2024-06-14 11:26:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:26:40,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:26:40,492 INFO L175 Difference]: Start difference. First operand has 170 places, 198 transitions, 2275 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:26:40,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 221 transitions, 2907 flow [2024-06-14 11:26:40,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 221 transitions, 2826 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:40,608 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 2476 flow [2024-06-14 11:26:40,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2476, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-14 11:26:40,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 11:26:40,609 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 2476 flow [2024-06-14 11:26:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:40,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:40,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:40,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:26:40,609 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)] === [2024-06-14 11:26:40,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1536129461, now seen corresponding path program 2 times [2024-06-14 11:26:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:40,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100404308] [2024-06-14 11:26:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:40,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:40,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:40,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100404308] [2024-06-14 11:26:40,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100404308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:40,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:40,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:40,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443356286] [2024-06-14 11:26:40,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:40,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:40,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:40,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:40,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:40,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 2476 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:40,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:40,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:40,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:41,100 INFO L124 PetriNetUnfolderBase]: 1520/2546 cut-off events. [2024-06-14 11:26:41,100 INFO L125 PetriNetUnfolderBase]: For 71490/71492 co-relation queries the response was YES. [2024-06-14 11:26:41,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15928 conditions, 2546 events. 1520/2546 cut-off events. For 71490/71492 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14429 event pairs, 442 based on Foata normal form. 1/2533 useless extension candidates. Maximal degree in co-relation 15837. Up to 2110 conditions per place. [2024-06-14 11:26:41,121 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 82 changer transitions 0/231 dead transitions. [2024-06-14 11:26:41,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 231 transitions, 3262 flow [2024-06-14 11:26:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:26:41,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 11:26:41,122 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 2476 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:26:41,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 231 transitions, 3262 flow [2024-06-14 11:26:41,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 231 transitions, 3166 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:41,233 INFO L231 Difference]: Finished difference. Result has 177 places, 213 transitions, 2766 flow [2024-06-14 11:26:41,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2766, PETRI_PLACES=177, PETRI_TRANSITIONS=213} [2024-06-14 11:26:41,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-14 11:26:41,234 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 213 transitions, 2766 flow [2024-06-14 11:26:41,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:41,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:41,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:41,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:26:41,234 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)] === [2024-06-14 11:26:41,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1535830559, now seen corresponding path program 1 times [2024-06-14 11:26:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:41,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111371303] [2024-06-14 11:26:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:41,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111371303] [2024-06-14 11:26:41,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111371303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:41,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:41,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:41,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553231434] [2024-06-14 11:26:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:41,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:41,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:41,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:41,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:41,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:41,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 213 transitions, 2766 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:41,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:41,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:41,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:41,804 INFO L124 PetriNetUnfolderBase]: 1624/2717 cut-off events. [2024-06-14 11:26:41,804 INFO L125 PetriNetUnfolderBase]: For 78793/78793 co-relation queries the response was YES. [2024-06-14 11:26:41,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17954 conditions, 2717 events. 1624/2717 cut-off events. For 78793/78793 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15589 event pairs, 563 based on Foata normal form. 1/2711 useless extension candidates. Maximal degree in co-relation 17859. Up to 2266 conditions per place. [2024-06-14 11:26:41,826 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 161 selfloop transitions, 118 changer transitions 0/285 dead transitions. [2024-06-14 11:26:41,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 285 transitions, 4321 flow [2024-06-14 11:26:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:26:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:26:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 11:26:41,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 11:26:41,827 INFO L175 Difference]: Start difference. First operand has 177 places, 213 transitions, 2766 flow. Second operand 10 states and 211 transitions. [2024-06-14 11:26:41,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 285 transitions, 4321 flow [2024-06-14 11:26:41,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 285 transitions, 4200 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 11:26:41,981 INFO L231 Difference]: Finished difference. Result has 191 places, 256 transitions, 3631 flow [2024-06-14 11:26:41,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3631, PETRI_PLACES=191, PETRI_TRANSITIONS=256} [2024-06-14 11:26:41,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-14 11:26:41,982 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 256 transitions, 3631 flow [2024-06-14 11:26:41,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:41,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:41,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:41,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:26:41,982 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)] === [2024-06-14 11:26:41,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash 901590739, now seen corresponding path program 3 times [2024-06-14 11:26:41,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:41,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742052910] [2024-06-14 11:26:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:42,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:42,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742052910] [2024-06-14 11:26:42,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742052910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:42,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:42,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:42,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984138976] [2024-06-14 11:26:42,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:42,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:42,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:42,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:42,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:42,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 256 transitions, 3631 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:42,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:42,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:42,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:42,496 INFO L124 PetriNetUnfolderBase]: 1629/2716 cut-off events. [2024-06-14 11:26:42,496 INFO L125 PetriNetUnfolderBase]: For 82843/82843 co-relation queries the response was YES. [2024-06-14 11:26:42,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18542 conditions, 2716 events. 1629/2716 cut-off events. For 82843/82843 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15489 event pairs, 441 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 18438. Up to 2199 conditions per place. [2024-06-14 11:26:42,560 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 167 selfloop transitions, 102 changer transitions 0/275 dead transitions. [2024-06-14 11:26:42,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 275 transitions, 4405 flow [2024-06-14 11:26:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 11:26:42,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-14 11:26:42,561 INFO L175 Difference]: Start difference. First operand has 191 places, 256 transitions, 3631 flow. Second operand 7 states and 148 transitions. [2024-06-14 11:26:42,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 275 transitions, 4405 flow [2024-06-14 11:26:42,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 275 transitions, 4319 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-14 11:26:42,751 INFO L231 Difference]: Finished difference. Result has 197 places, 259 transitions, 3798 flow [2024-06-14 11:26:42,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3798, PETRI_PLACES=197, PETRI_TRANSITIONS=259} [2024-06-14 11:26:42,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-14 11:26:42,752 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 259 transitions, 3798 flow [2024-06-14 11:26:42,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:42,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:42,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:42,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:26:42,753 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)] === [2024-06-14 11:26:42,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1008200607, now seen corresponding path program 2 times [2024-06-14 11:26:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:42,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418531912] [2024-06-14 11:26:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:42,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:42,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:42,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418531912] [2024-06-14 11:26:42,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418531912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:42,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:42,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854146263] [2024-06-14 11:26:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:42,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:42,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:42,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 259 transitions, 3798 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:42,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:42,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:42,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:43,334 INFO L124 PetriNetUnfolderBase]: 1673/2798 cut-off events. [2024-06-14 11:26:43,334 INFO L125 PetriNetUnfolderBase]: For 85575/85575 co-relation queries the response was YES. [2024-06-14 11:26:43,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 2798 events. 1673/2798 cut-off events. For 85575/85575 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16050 event pairs, 398 based on Foata normal form. 2/2797 useless extension candidates. Maximal degree in co-relation 19241. Up to 2427 conditions per place. [2024-06-14 11:26:43,358 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 209 selfloop transitions, 87 changer transitions 0/302 dead transitions. [2024-06-14 11:26:43,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 302 transitions, 4954 flow [2024-06-14 11:26:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:26:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:26:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 11:26:43,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-14 11:26:43,359 INFO L175 Difference]: Start difference. First operand has 197 places, 259 transitions, 3798 flow. Second operand 10 states and 207 transitions. [2024-06-14 11:26:43,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 302 transitions, 4954 flow [2024-06-14 11:26:43,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 302 transitions, 4759 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:43,546 INFO L231 Difference]: Finished difference. Result has 205 places, 281 transitions, 4209 flow [2024-06-14 11:26:43,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4209, PETRI_PLACES=205, PETRI_TRANSITIONS=281} [2024-06-14 11:26:43,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 11:26:43,546 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 281 transitions, 4209 flow [2024-06-14 11:26:43,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:43,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:43,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:43,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:26:43,547 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)] === [2024-06-14 11:26:43,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1078722259, now seen corresponding path program 4 times [2024-06-14 11:26:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:43,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444667042] [2024-06-14 11:26:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:43,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:43,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444667042] [2024-06-14 11:26:43,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444667042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:43,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:43,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:43,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250289805] [2024-06-14 11:26:43,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:43,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:43,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:43,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 281 transitions, 4209 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:43,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:43,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:43,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:44,146 INFO L124 PetriNetUnfolderBase]: 1678/2807 cut-off events. [2024-06-14 11:26:44,147 INFO L125 PetriNetUnfolderBase]: For 90744/90744 co-relation queries the response was YES. [2024-06-14 11:26:44,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19929 conditions, 2807 events. 1678/2807 cut-off events. For 90744/90744 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16061 event pairs, 404 based on Foata normal form. 1/2802 useless extension candidates. Maximal degree in co-relation 19819. Up to 2470 conditions per place. [2024-06-14 11:26:44,174 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 232 selfloop transitions, 58 changer transitions 0/296 dead transitions. [2024-06-14 11:26:44,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 296 transitions, 4950 flow [2024-06-14 11:26:44,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:26:44,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-14 11:26:44,175 INFO L175 Difference]: Start difference. First operand has 205 places, 281 transitions, 4209 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:26:44,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 296 transitions, 4950 flow [2024-06-14 11:26:44,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 296 transitions, 4783 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-14 11:26:44,407 INFO L231 Difference]: Finished difference. Result has 209 places, 284 transitions, 4246 flow [2024-06-14 11:26:44,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4246, PETRI_PLACES=209, PETRI_TRANSITIONS=284} [2024-06-14 11:26:44,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-14 11:26:44,407 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 284 transitions, 4246 flow [2024-06-14 11:26:44,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:44,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:44,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:44,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:26:44,408 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)] === [2024-06-14 11:26:44,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1890979193, now seen corresponding path program 3 times [2024-06-14 11:26:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:44,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566742295] [2024-06-14 11:26:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:44,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:44,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566742295] [2024-06-14 11:26:44,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566742295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:44,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:44,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:44,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743059381] [2024-06-14 11:26:44,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:44,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:44,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:44,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:44,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:44,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:26:44,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 284 transitions, 4246 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:44,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:44,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:26:44,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:45,070 INFO L124 PetriNetUnfolderBase]: 1672/2799 cut-off events. [2024-06-14 11:26:45,071 INFO L125 PetriNetUnfolderBase]: For 89340/89340 co-relation queries the response was YES. [2024-06-14 11:26:45,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19780 conditions, 2799 events. 1672/2799 cut-off events. For 89340/89340 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16062 event pairs, 398 based on Foata normal form. 2/2798 useless extension candidates. Maximal degree in co-relation 19668. Up to 2430 conditions per place. [2024-06-14 11:26:45,097 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 214 selfloop transitions, 84 changer transitions 0/304 dead transitions. [2024-06-14 11:26:45,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 304 transitions, 5000 flow [2024-06-14 11:26:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:26:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:26:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 11:26:45,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-14 11:26:45,098 INFO L175 Difference]: Start difference. First operand has 209 places, 284 transitions, 4246 flow. Second operand 10 states and 206 transitions. [2024-06-14 11:26:45,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 304 transitions, 5000 flow [2024-06-14 11:26:45,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 304 transitions, 4795 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:45,326 INFO L231 Difference]: Finished difference. Result has 214 places, 285 transitions, 4263 flow [2024-06-14 11:26:45,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4263, PETRI_PLACES=214, PETRI_TRANSITIONS=285} [2024-06-14 11:26:45,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 11:26:45,327 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 285 transitions, 4263 flow [2024-06-14 11:26:45,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:45,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:45,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:45,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:26:45,327 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)] === [2024-06-14 11:26:45,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1078968709, now seen corresponding path program 1 times [2024-06-14 11:26:45,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:45,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552631020] [2024-06-14 11:26:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:45,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552631020] [2024-06-14 11:26:45,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552631020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:45,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:45,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:26:45,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345156270] [2024-06-14 11:26:45,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:45,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:26:45,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:45,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:26:45,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:26:45,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:45,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 285 transitions, 4263 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:45,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:45,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:45,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:45,956 INFO L124 PetriNetUnfolderBase]: 1654/2797 cut-off events. [2024-06-14 11:26:45,956 INFO L125 PetriNetUnfolderBase]: For 99135/99136 co-relation queries the response was YES. [2024-06-14 11:26:45,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19736 conditions, 2797 events. 1654/2797 cut-off events. For 99135/99136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16346 event pairs, 396 based on Foata normal form. 10/2795 useless extension candidates. Maximal degree in co-relation 19623. Up to 2332 conditions per place. [2024-06-14 11:26:45,981 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 45 changer transitions 0/304 dead transitions. [2024-06-14 11:26:45,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 304 transitions, 4887 flow [2024-06-14 11:26:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:26:45,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:26:45,986 INFO L175 Difference]: Start difference. First operand has 214 places, 285 transitions, 4263 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:26:45,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 304 transitions, 4887 flow [2024-06-14 11:26:46,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 304 transitions, 4748 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 11:26:46,188 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 4239 flow [2024-06-14 11:26:46,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4239, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2024-06-14 11:26:46,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 11:26:46,189 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 4239 flow [2024-06-14 11:26:46,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:46,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:46,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:46,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:26:46,189 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)] === [2024-06-14 11:26:46,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1709550895, now seen corresponding path program 4 times [2024-06-14 11:26:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:46,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869044231] [2024-06-14 11:26:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:46,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:46,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869044231] [2024-06-14 11:26:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869044231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:46,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:46,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381874483] [2024-06-14 11:26:46,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:46,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:46,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:46,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 4239 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) [2024-06-14 11:26:46,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:46,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:46,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:46,688 INFO L124 PetriNetUnfolderBase]: 1710/2858 cut-off events. [2024-06-14 11:26:46,688 INFO L125 PetriNetUnfolderBase]: For 95089/95094 co-relation queries the response was YES. [2024-06-14 11:26:46,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20114 conditions, 2858 events. 1710/2858 cut-off events. For 95089/95094 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16608 event pairs, 586 based on Foata normal form. 6/2856 useless extension candidates. Maximal degree in co-relation 20001. Up to 2388 conditions per place. [2024-06-14 11:26:46,714 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 127 changer transitions 0/312 dead transitions. [2024-06-14 11:26:46,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 312 transitions, 5180 flow [2024-06-14 11:26:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:26:46,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 11:26:46,715 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 4239 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:26:46,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 312 transitions, 5180 flow [2024-06-14 11:26:46,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 312 transitions, 5093 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:46,921 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4598 flow [2024-06-14 11:26:46,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4598, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-14 11:26:46,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 11:26:46,922 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4598 flow [2024-06-14 11:26:46,922 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) [2024-06-14 11:26:46,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:46,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:46,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:26:46,922 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)] === [2024-06-14 11:26:46,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1859933875, now seen corresponding path program 5 times [2024-06-14 11:26:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:46,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208106445] [2024-06-14 11:26:46,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:46,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208106445] [2024-06-14 11:26:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208106445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721926180] [2024-06-14 11:26:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:47,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:47,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4598 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) [2024-06-14 11:26:47,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:47,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:47,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:47,514 INFO L124 PetriNetUnfolderBase]: 1798/2998 cut-off events. [2024-06-14 11:26:47,514 INFO L125 PetriNetUnfolderBase]: For 104234/104234 co-relation queries the response was YES. [2024-06-14 11:26:47,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22042 conditions, 2998 events. 1798/2998 cut-off events. For 104234/104234 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17361 event pairs, 413 based on Foata normal form. 2/2994 useless extension candidates. Maximal degree in co-relation 21928. Up to 2487 conditions per place. [2024-06-14 11:26:47,539 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 130 changer transitions 0/350 dead transitions. [2024-06-14 11:26:47,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 350 transitions, 6211 flow [2024-06-14 11:26:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:26:47,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 11:26:47,540 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4598 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:26:47,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 350 transitions, 6211 flow [2024-06-14 11:26:47,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 350 transitions, 6050 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:47,782 INFO L231 Difference]: Finished difference. Result has 224 places, 327 transitions, 5527 flow [2024-06-14 11:26:47,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5527, PETRI_PLACES=224, PETRI_TRANSITIONS=327} [2024-06-14 11:26:47,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 11:26:47,783 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 327 transitions, 5527 flow [2024-06-14 11:26:47,783 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) [2024-06-14 11:26:47,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:47,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:47,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:26:47,783 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)] === [2024-06-14 11:26:47,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1859696725, now seen corresponding path program 6 times [2024-06-14 11:26:47,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332636906] [2024-06-14 11:26:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:47,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:47,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332636906] [2024-06-14 11:26:47,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332636906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:47,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:47,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647758106] [2024-06-14 11:26:47,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:47,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:47,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:47,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:47,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 327 transitions, 5527 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) [2024-06-14 11:26:47,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:47,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:47,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:48,388 INFO L124 PetriNetUnfolderBase]: 1792/2986 cut-off events. [2024-06-14 11:26:48,388 INFO L125 PetriNetUnfolderBase]: For 109959/109959 co-relation queries the response was YES. [2024-06-14 11:26:48,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22865 conditions, 2986 events. 1792/2986 cut-off events. For 109959/109959 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17263 event pairs, 413 based on Foata normal form. 2/2982 useless extension candidates. Maximal degree in co-relation 22747. Up to 2483 conditions per place. [2024-06-14 11:26:48,417 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 121 changer transitions 0/345 dead transitions. [2024-06-14 11:26:48,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 345 transitions, 6389 flow [2024-06-14 11:26:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 11:26:48,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 11:26:48,419 INFO L175 Difference]: Start difference. First operand has 224 places, 327 transitions, 5527 flow. Second operand 7 states and 160 transitions. [2024-06-14 11:26:48,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 345 transitions, 6389 flow [2024-06-14 11:26:48,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 345 transitions, 6221 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:48,699 INFO L231 Difference]: Finished difference. Result has 229 places, 328 transitions, 5709 flow [2024-06-14 11:26:48,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5361, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5709, PETRI_PLACES=229, PETRI_TRANSITIONS=328} [2024-06-14 11:26:48,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 11:26:48,700 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 328 transitions, 5709 flow [2024-06-14 11:26:48,700 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) [2024-06-14 11:26:48,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:48,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:48,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:26:48,700 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)] === [2024-06-14 11:26:48,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:48,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1793720645, now seen corresponding path program 2 times [2024-06-14 11:26:48,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:48,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743808466] [2024-06-14 11:26:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:48,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:48,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:48,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743808466] [2024-06-14 11:26:48,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743808466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:48,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:48,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:48,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964024030] [2024-06-14 11:26:48,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:48,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:48,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:48,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:48,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 328 transitions, 5709 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:48,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:48,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:48,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:49,274 INFO L124 PetriNetUnfolderBase]: 1757/2966 cut-off events. [2024-06-14 11:26:49,274 INFO L125 PetriNetUnfolderBase]: For 115644/115645 co-relation queries the response was YES. [2024-06-14 11:26:49,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22673 conditions, 2966 events. 1757/2966 cut-off events. For 115644/115645 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17576 event pairs, 413 based on Foata normal form. 10/2958 useless extension candidates. Maximal degree in co-relation 22553. Up to 2426 conditions per place. [2024-06-14 11:26:49,301 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 37 changer transitions 0/341 dead transitions. [2024-06-14 11:26:49,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 341 transitions, 6369 flow [2024-06-14 11:26:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:26:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:26:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 11:26:49,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 11:26:49,302 INFO L175 Difference]: Start difference. First operand has 229 places, 328 transitions, 5709 flow. Second operand 5 states and 118 transitions. [2024-06-14 11:26:49,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 341 transitions, 6369 flow [2024-06-14 11:26:49,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 341 transitions, 6197 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:49,552 INFO L231 Difference]: Finished difference. Result has 230 places, 329 transitions, 5642 flow [2024-06-14 11:26:49,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5642, PETRI_PLACES=230, PETRI_TRANSITIONS=329} [2024-06-14 11:26:49,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 11:26:49,552 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 329 transitions, 5642 flow [2024-06-14 11:26:49,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:49,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:49,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:49,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:26:49,553 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)] === [2024-06-14 11:26:49,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash 835068725, now seen corresponding path program 7 times [2024-06-14 11:26:49,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:49,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927210558] [2024-06-14 11:26:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:49,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:49,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927210558] [2024-06-14 11:26:49,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927210558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:49,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:49,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:49,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819931836] [2024-06-14 11:26:49,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:49,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:49,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:49,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:49,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 329 transitions, 5642 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) [2024-06-14 11:26:49,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:49,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:49,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:50,088 INFO L124 PetriNetUnfolderBase]: 1833/3052 cut-off events. [2024-06-14 11:26:50,088 INFO L125 PetriNetUnfolderBase]: For 111815/111820 co-relation queries the response was YES. [2024-06-14 11:26:50,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23279 conditions, 3052 events. 1833/3052 cut-off events. For 111815/111820 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17816 event pairs, 608 based on Foata normal form. 5/3044 useless extension candidates. Maximal degree in co-relation 23159. Up to 2492 conditions per place. [2024-06-14 11:26:50,118 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 136 changer transitions 0/356 dead transitions. [2024-06-14 11:26:50,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 356 transitions, 6709 flow [2024-06-14 11:26:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 11:26:50,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 11:26:50,119 INFO L175 Difference]: Start difference. First operand has 230 places, 329 transitions, 5642 flow. Second operand 7 states and 156 transitions. [2024-06-14 11:26:50,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 356 transitions, 6709 flow [2024-06-14 11:26:50,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 356 transitions, 6636 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:50,371 INFO L231 Difference]: Finished difference. Result has 235 places, 340 transitions, 6108 flow [2024-06-14 11:26:50,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6108, PETRI_PLACES=235, PETRI_TRANSITIONS=340} [2024-06-14 11:26:50,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 11:26:50,372 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 340 transitions, 6108 flow [2024-06-14 11:26:50,372 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) [2024-06-14 11:26:50,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:50,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:26:50,372 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)] === [2024-06-14 11:26:50,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash 922911493, now seen corresponding path program 8 times [2024-06-14 11:26:50,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:50,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33174769] [2024-06-14 11:26:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:50,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33174769] [2024-06-14 11:26:50,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33174769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:50,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:50,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:50,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849433180] [2024-06-14 11:26:50,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:50,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:50,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:50,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:50,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 340 transitions, 6108 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) [2024-06-14 11:26:50,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:50,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:50,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:51,021 INFO L124 PetriNetUnfolderBase]: 1867/3111 cut-off events. [2024-06-14 11:26:51,021 INFO L125 PetriNetUnfolderBase]: For 116848/116848 co-relation queries the response was YES. [2024-06-14 11:26:51,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24526 conditions, 3111 events. 1867/3111 cut-off events. For 116848/116848 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18141 event pairs, 421 based on Foata normal form. 2/3107 useless extension candidates. Maximal degree in co-relation 24404. Up to 2511 conditions per place. [2024-06-14 11:26:51,057 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 149 changer transitions 0/375 dead transitions. [2024-06-14 11:26:51,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 375 transitions, 7374 flow [2024-06-14 11:26:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 11:26:51,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 11:26:51,058 INFO L175 Difference]: Start difference. First operand has 235 places, 340 transitions, 6108 flow. Second operand 9 states and 197 transitions. [2024-06-14 11:26:51,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 375 transitions, 7374 flow [2024-06-14 11:26:51,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 375 transitions, 7293 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 11:26:51,333 INFO L231 Difference]: Finished difference. Result has 244 places, 355 transitions, 6704 flow [2024-06-14 11:26:51,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6704, PETRI_PLACES=244, PETRI_TRANSITIONS=355} [2024-06-14 11:26:51,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-14 11:26:51,334 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 355 transitions, 6704 flow [2024-06-14 11:26:51,334 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) [2024-06-14 11:26:51,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:51,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:51,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:26:51,334 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)] === [2024-06-14 11:26:51,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash 383133959, now seen corresponding path program 9 times [2024-06-14 11:26:51,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:51,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683689620] [2024-06-14 11:26:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:51,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:51,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:51,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683689620] [2024-06-14 11:26:51,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683689620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:51,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:51,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:51,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033202112] [2024-06-14 11:26:51,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:51,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:51,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:51,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:51,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:51,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 355 transitions, 6704 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) [2024-06-14 11:26:51,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:51,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:51,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:51,961 INFO L124 PetriNetUnfolderBase]: 1864/3108 cut-off events. [2024-06-14 11:26:51,961 INFO L125 PetriNetUnfolderBase]: For 124309/124309 co-relation queries the response was YES. [2024-06-14 11:26:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25373 conditions, 3108 events. 1864/3108 cut-off events. For 124309/124309 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18132 event pairs, 417 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 25246. Up to 2637 conditions per place. [2024-06-14 11:26:51,994 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 90 changer transitions 0/375 dead transitions. [2024-06-14 11:26:51,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 375 transitions, 7520 flow [2024-06-14 11:26:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:26:51,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:26:51,995 INFO L175 Difference]: Start difference. First operand has 244 places, 355 transitions, 6704 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:26:51,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 375 transitions, 7520 flow [2024-06-14 11:26:52,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 375 transitions, 7236 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:52,260 INFO L231 Difference]: Finished difference. Result has 247 places, 355 transitions, 6606 flow [2024-06-14 11:26:52,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6606, PETRI_PLACES=247, PETRI_TRANSITIONS=355} [2024-06-14 11:26:52,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-14 11:26:52,260 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 355 transitions, 6606 flow [2024-06-14 11:26:52,260 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) [2024-06-14 11:26:52,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:52,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:52,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:26:52,260 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)] === [2024-06-14 11:26:52,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash 383549669, now seen corresponding path program 10 times [2024-06-14 11:26:52,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:52,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212914324] [2024-06-14 11:26:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:52,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:52,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:52,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212914324] [2024-06-14 11:26:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212914324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:52,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:52,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:52,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191221335] [2024-06-14 11:26:52,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:52,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:52,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:52,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:52,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 355 transitions, 6606 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) [2024-06-14 11:26:52,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:52,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:52,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:52,878 INFO L124 PetriNetUnfolderBase]: 1869/3107 cut-off events. [2024-06-14 11:26:52,878 INFO L125 PetriNetUnfolderBase]: For 127978/127978 co-relation queries the response was YES. [2024-06-14 11:26:52,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25560 conditions, 3107 events. 1869/3107 cut-off events. For 127978/127978 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18052 event pairs, 424 based on Foata normal form. 1/3102 useless extension candidates. Maximal degree in co-relation 25431. Up to 2513 conditions per place. [2024-06-14 11:26:52,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 160 changer transitions 0/380 dead transitions. [2024-06-14 11:26:52,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 380 transitions, 7693 flow [2024-06-14 11:26:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:26:52,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:26:52,911 INFO L175 Difference]: Start difference. First operand has 247 places, 355 transitions, 6606 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:26:52,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 380 transitions, 7693 flow [2024-06-14 11:26:53,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 380 transitions, 7416 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:26:53,179 INFO L231 Difference]: Finished difference. Result has 249 places, 358 transitions, 6710 flow [2024-06-14 11:26:53,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6710, PETRI_PLACES=249, PETRI_TRANSITIONS=358} [2024-06-14 11:26:53,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 11:26:53,179 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 358 transitions, 6710 flow [2024-06-14 11:26:53,180 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) [2024-06-14 11:26:53,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:53,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:53,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:26:53,180 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)] === [2024-06-14 11:26:53,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash -730211461, now seen corresponding path program 11 times [2024-06-14 11:26:53,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:53,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305072748] [2024-06-14 11:26:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:53,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305072748] [2024-06-14 11:26:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305072748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:53,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:53,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:53,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656807986] [2024-06-14 11:26:53,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:53,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:53,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:53,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:53,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 358 transitions, 6710 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) [2024-06-14 11:26:53,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:53,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:53,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:53,776 INFO L124 PetriNetUnfolderBase]: 1866/3108 cut-off events. [2024-06-14 11:26:53,776 INFO L125 PetriNetUnfolderBase]: For 131271/131271 co-relation queries the response was YES. [2024-06-14 11:26:53,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25584 conditions, 3108 events. 1866/3108 cut-off events. For 131271/131271 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18129 event pairs, 420 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 25455. Up to 2511 conditions per place. [2024-06-14 11:26:53,811 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 153 changer transitions 0/376 dead transitions. [2024-06-14 11:26:53,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 376 transitions, 7631 flow [2024-06-14 11:26:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:26:53,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:26:53,812 INFO L175 Difference]: Start difference. First operand has 249 places, 358 transitions, 6710 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:26:53,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 376 transitions, 7631 flow [2024-06-14 11:26:54,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 376 transitions, 7411 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:54,067 INFO L231 Difference]: Finished difference. Result has 254 places, 358 transitions, 6802 flow [2024-06-14 11:26:54,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6802, PETRI_PLACES=254, PETRI_TRANSITIONS=358} [2024-06-14 11:26:54,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 11:26:54,067 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 358 transitions, 6802 flow [2024-06-14 11:26:54,068 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) [2024-06-14 11:26:54,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:54,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:54,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:26:54,068 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)] === [2024-06-14 11:26:54,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash 605745827, now seen corresponding path program 3 times [2024-06-14 11:26:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:54,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839706033] [2024-06-14 11:26:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:54,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:54,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839706033] [2024-06-14 11:26:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839706033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:54,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:54,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:54,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712605422] [2024-06-14 11:26:54,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:54,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:54,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:54,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:54,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 358 transitions, 6802 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:54,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:54,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:54,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:54,700 INFO L124 PetriNetUnfolderBase]: 1837/3089 cut-off events. [2024-06-14 11:26:54,701 INFO L125 PetriNetUnfolderBase]: For 145169/145170 co-relation queries the response was YES. [2024-06-14 11:26:54,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25401 conditions, 3089 events. 1837/3089 cut-off events. For 145169/145170 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18328 event pairs, 420 based on Foata normal form. 10/3083 useless extension candidates. Maximal degree in co-relation 25271. Up to 2570 conditions per place. [2024-06-14 11:26:54,730 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 277 selfloop transitions, 39 changer transitions 0/372 dead transitions. [2024-06-14 11:26:54,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 372 transitions, 7518 flow [2024-06-14 11:26:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:26:54,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:26:54,731 INFO L175 Difference]: Start difference. First operand has 254 places, 358 transitions, 6802 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:26:54,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 372 transitions, 7518 flow [2024-06-14 11:26:54,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 372 transitions, 7181 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:26:54,983 INFO L231 Difference]: Finished difference. Result has 254 places, 359 transitions, 6567 flow [2024-06-14 11:26:54,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6465, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6567, PETRI_PLACES=254, PETRI_TRANSITIONS=359} [2024-06-14 11:26:54,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 11:26:54,983 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 359 transitions, 6567 flow [2024-06-14 11:26:54,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:54,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:54,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:54,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:26:54,984 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)] === [2024-06-14 11:26:54,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 4 times [2024-06-14 11:26:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:54,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075216476] [2024-06-14 11:26:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:54,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:55,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:55,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075216476] [2024-06-14 11:26:55,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075216476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:55,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:55,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861712793] [2024-06-14 11:26:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:55,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:55,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:55,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:55,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 359 transitions, 6567 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:55,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:55,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:55,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:55,610 INFO L124 PetriNetUnfolderBase]: 1838/3091 cut-off events. [2024-06-14 11:26:55,610 INFO L125 PetriNetUnfolderBase]: For 142626/142627 co-relation queries the response was YES. [2024-06-14 11:26:55,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25078 conditions, 3091 events. 1838/3091 cut-off events. For 142626/142627 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18324 event pairs, 411 based on Foata normal form. 8/3083 useless extension candidates. Maximal degree in co-relation 24947. Up to 2471 conditions per place. [2024-06-14 11:26:55,644 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 277 selfloop transitions, 43 changer transitions 0/376 dead transitions. [2024-06-14 11:26:55,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 376 transitions, 7315 flow [2024-06-14 11:26:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:26:55,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:26:55,645 INFO L175 Difference]: Start difference. First operand has 254 places, 359 transitions, 6567 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:26:55,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 376 transitions, 7315 flow [2024-06-14 11:26:55,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 7225 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:55,966 INFO L231 Difference]: Finished difference. Result has 256 places, 360 transitions, 6587 flow [2024-06-14 11:26:55,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6587, PETRI_PLACES=256, PETRI_TRANSITIONS=360} [2024-06-14 11:26:55,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 11:26:55,967 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 360 transitions, 6587 flow [2024-06-14 11:26:55,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:55,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:55,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:55,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:26:55,968 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)] === [2024-06-14 11:26:55,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash 716750777, now seen corresponding path program 1 times [2024-06-14 11:26:55,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:55,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453781470] [2024-06-14 11:26:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:55,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:56,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:56,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453781470] [2024-06-14 11:26:56,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453781470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:56,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:56,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:56,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810685844] [2024-06-14 11:26:56,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:56,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:56,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:56,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:56,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 360 transitions, 6587 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:56,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:56,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:56,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:56,615 INFO L124 PetriNetUnfolderBase]: 1863/3137 cut-off events. [2024-06-14 11:26:56,615 INFO L125 PetriNetUnfolderBase]: For 147143/147187 co-relation queries the response was YES. [2024-06-14 11:26:56,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25520 conditions, 3137 events. 1863/3137 cut-off events. For 147143/147187 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18731 event pairs, 546 based on Foata normal form. 28/3135 useless extension candidates. Maximal degree in co-relation 25388. Up to 2512 conditions per place. [2024-06-14 11:26:56,645 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 270 selfloop transitions, 86 changer transitions 0/384 dead transitions. [2024-06-14 11:26:56,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 384 transitions, 7518 flow [2024-06-14 11:26:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:26:56,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 11:26:56,646 INFO L175 Difference]: Start difference. First operand has 256 places, 360 transitions, 6587 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:26:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 384 transitions, 7518 flow [2024-06-14 11:26:56,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 384 transitions, 7424 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:56,944 INFO L231 Difference]: Finished difference. Result has 258 places, 364 transitions, 6727 flow [2024-06-14 11:26:56,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6727, PETRI_PLACES=258, PETRI_TRANSITIONS=364} [2024-06-14 11:26:56,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-14 11:26:56,945 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 364 transitions, 6727 flow [2024-06-14 11:26:56,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:56,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:56,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:56,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:26:56,945 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)] === [2024-06-14 11:26:56,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash 408908555, now seen corresponding path program 2 times [2024-06-14 11:26:56,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:56,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958019742] [2024-06-14 11:26:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:56,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958019742] [2024-06-14 11:26:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958019742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:57,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:57,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:26:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679820004] [2024-06-14 11:26:57,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:57,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:26:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:26:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:26:57,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:57,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 364 transitions, 6727 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:57,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:57,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:57,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:57,537 INFO L124 PetriNetUnfolderBase]: 1880/3167 cut-off events. [2024-06-14 11:26:57,537 INFO L125 PetriNetUnfolderBase]: For 150970/151017 co-relation queries the response was YES. [2024-06-14 11:26:57,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25894 conditions, 3167 events. 1880/3167 cut-off events. For 150970/151017 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18870 event pairs, 422 based on Foata normal form. 30/3167 useless extension candidates. Maximal degree in co-relation 25761. Up to 2655 conditions per place. [2024-06-14 11:26:57,572 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 273 selfloop transitions, 79 changer transitions 0/380 dead transitions. [2024-06-14 11:26:57,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 380 transitions, 7512 flow [2024-06-14 11:26:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:26:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:26:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:26:57,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 11:26:57,576 INFO L175 Difference]: Start difference. First operand has 258 places, 364 transitions, 6727 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:26:57,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 380 transitions, 7512 flow [2024-06-14 11:26:57,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 380 transitions, 7341 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:26:57,935 INFO L231 Difference]: Finished difference. Result has 261 places, 366 transitions, 6755 flow [2024-06-14 11:26:57,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6568, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6755, PETRI_PLACES=261, PETRI_TRANSITIONS=366} [2024-06-14 11:26:57,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 11:26:57,935 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 366 transitions, 6755 flow [2024-06-14 11:26:57,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:57,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:57,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:26:57,936 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)] === [2024-06-14 11:26:57,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1418167605, now seen corresponding path program 3 times [2024-06-14 11:26:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:57,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259715902] [2024-06-14 11:26:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:58,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259715902] [2024-06-14 11:26:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259715902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:58,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:58,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:58,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029577169] [2024-06-14 11:26:58,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:58,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:58,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:58,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:58,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:58,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:26:58,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 366 transitions, 6755 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:58,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:58,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:26:58,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:58,622 INFO L124 PetriNetUnfolderBase]: 1874/3144 cut-off events. [2024-06-14 11:26:58,622 INFO L125 PetriNetUnfolderBase]: For 150769/150804 co-relation queries the response was YES. [2024-06-14 11:26:58,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25768 conditions, 3144 events. 1874/3144 cut-off events. For 150769/150804 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18659 event pairs, 420 based on Foata normal form. 22/3133 useless extension candidates. Maximal degree in co-relation 25634. Up to 2649 conditions per place. [2024-06-14 11:26:58,657 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 267 selfloop transitions, 86 changer transitions 0/381 dead transitions. [2024-06-14 11:26:58,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 7514 flow [2024-06-14 11:26:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 11:26:58,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:26:58,658 INFO L175 Difference]: Start difference. First operand has 261 places, 366 transitions, 6755 flow. Second operand 7 states and 154 transitions. [2024-06-14 11:26:58,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 7514 flow [2024-06-14 11:26:58,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 381 transitions, 7351 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:58,967 INFO L231 Difference]: Finished difference. Result has 264 places, 366 transitions, 6771 flow [2024-06-14 11:26:58,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6592, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6771, PETRI_PLACES=264, PETRI_TRANSITIONS=366} [2024-06-14 11:26:58,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-14 11:26:58,968 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 366 transitions, 6771 flow [2024-06-14 11:26:58,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:58,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:58,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:58,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:26:58,968 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)] === [2024-06-14 11:26:58,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:58,969 INFO L85 PathProgramCache]: Analyzing trace with hash 835083605, now seen corresponding path program 1 times [2024-06-14 11:26:58,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:58,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416604653] [2024-06-14 11:26:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:58,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:59,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416604653] [2024-06-14 11:26:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416604653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:59,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:59,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:26:59,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745963414] [2024-06-14 11:26:59,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:59,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:26:59,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:26:59,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:26:59,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:59,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 366 transitions, 6771 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) [2024-06-14 11:26:59,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:59,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:59,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:59,627 INFO L124 PetriNetUnfolderBase]: 1934/3224 cut-off events. [2024-06-14 11:26:59,628 INFO L125 PetriNetUnfolderBase]: For 154926/154926 co-relation queries the response was YES. [2024-06-14 11:26:59,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26281 conditions, 3224 events. 1934/3224 cut-off events. For 154926/154926 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19042 event pairs, 768 based on Foata normal form. 2/3223 useless extension candidates. Maximal degree in co-relation 26146. Up to 2897 conditions per place. [2024-06-14 11:26:59,662 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 326 selfloop transitions, 51 changer transitions 0/383 dead transitions. [2024-06-14 11:26:59,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 383 transitions, 7626 flow [2024-06-14 11:26:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:26:59,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 11:26:59,664 INFO L175 Difference]: Start difference. First operand has 264 places, 366 transitions, 6771 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:26:59,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 383 transitions, 7626 flow [2024-06-14 11:26:59,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 383 transitions, 7445 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 11:27:00,001 INFO L231 Difference]: Finished difference. Result has 266 places, 368 transitions, 6741 flow [2024-06-14 11:27:00,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6741, PETRI_PLACES=266, PETRI_TRANSITIONS=368} [2024-06-14 11:27:00,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 11:27:00,002 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 368 transitions, 6741 flow [2024-06-14 11:27:00,002 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) [2024-06-14 11:27:00,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:00,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:00,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:27:00,002 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)] === [2024-06-14 11:27:00,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash 383379851, now seen corresponding path program 4 times [2024-06-14 11:27:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216440713] [2024-06-14 11:27:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:00,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:00,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216440713] [2024-06-14 11:27:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216440713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:00,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:27:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056189089] [2024-06-14 11:27:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:27:00,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:27:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:27:00,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:27:00,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 368 transitions, 6741 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:00,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:00,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:27:00,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:00,615 INFO L124 PetriNetUnfolderBase]: 1863/3135 cut-off events. [2024-06-14 11:27:00,615 INFO L125 PetriNetUnfolderBase]: For 152428/152436 co-relation queries the response was YES. [2024-06-14 11:27:00,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25497 conditions, 3135 events. 1863/3135 cut-off events. For 152428/152436 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 18641 event pairs, 358 based on Foata normal form. 11/3124 useless extension candidates. Maximal degree in co-relation 25361. Up to 2363 conditions per place. [2024-06-14 11:27:00,651 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 96 changer transitions 0/392 dead transitions. [2024-06-14 11:27:00,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 392 transitions, 7596 flow [2024-06-14 11:27:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:27:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:27:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:27:00,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 11:27:00,652 INFO L175 Difference]: Start difference. First operand has 266 places, 368 transitions, 6741 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:27:00,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 392 transitions, 7596 flow [2024-06-14 11:27:00,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 392 transitions, 7455 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 11:27:00,995 INFO L231 Difference]: Finished difference. Result has 268 places, 368 transitions, 6820 flow [2024-06-14 11:27:00,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6820, PETRI_PLACES=268, PETRI_TRANSITIONS=368} [2024-06-14 11:27:00,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 11:27:00,996 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 368 transitions, 6820 flow [2024-06-14 11:27:00,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:00,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:00,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:00,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:27:00,997 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)] === [2024-06-14 11:27:00,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash 383564549, now seen corresponding path program 2 times [2024-06-14 11:27:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:00,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684618903] [2024-06-14 11:27:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:01,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:01,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684618903] [2024-06-14 11:27:01,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684618903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:01,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:01,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:27:01,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353639779] [2024-06-14 11:27:01,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:01,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:27:01,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:27:01,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:27:01,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:01,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 368 transitions, 6820 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) [2024-06-14 11:27:01,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:01,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:01,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:01,625 INFO L124 PetriNetUnfolderBase]: 1927/3225 cut-off events. [2024-06-14 11:27:01,626 INFO L125 PetriNetUnfolderBase]: For 157898/157898 co-relation queries the response was YES. [2024-06-14 11:27:01,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26348 conditions, 3225 events. 1927/3225 cut-off events. For 157898/157898 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19118 event pairs, 754 based on Foata normal form. 2/3226 useless extension candidates. Maximal degree in co-relation 26211. Up to 2909 conditions per place. [2024-06-14 11:27:01,663 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 348 selfloop transitions, 34 changer transitions 0/388 dead transitions. [2024-06-14 11:27:01,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 388 transitions, 7703 flow [2024-06-14 11:27:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:27:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:27:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 11:27:01,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:27:01,664 INFO L175 Difference]: Start difference. First operand has 268 places, 368 transitions, 6820 flow. Second operand 7 states and 154 transitions. [2024-06-14 11:27:01,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 388 transitions, 7703 flow [2024-06-14 11:27:02,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 388 transitions, 7537 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:27:02,020 INFO L231 Difference]: Finished difference. Result has 271 places, 370 transitions, 6775 flow [2024-06-14 11:27:02,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6775, PETRI_PLACES=271, PETRI_TRANSITIONS=370} [2024-06-14 11:27:02,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 11:27:02,021 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 370 transitions, 6775 flow [2024-06-14 11:27:02,021 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) [2024-06-14 11:27:02,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:02,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:02,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:27:02,021 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)] === [2024-06-14 11:27:02,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash 611465699, now seen corresponding path program 3 times [2024-06-14 11:27:02,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:02,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425824746] [2024-06-14 11:27:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:02,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:02,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425824746] [2024-06-14 11:27:02,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425824746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:02,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:02,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:27:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791978880] [2024-06-14 11:27:02,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:27:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:02,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:27:02,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:27:02,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:02,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 370 transitions, 6775 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) [2024-06-14 11:27:02,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:02,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:02,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:02,667 INFO L124 PetriNetUnfolderBase]: 1935/3237 cut-off events. [2024-06-14 11:27:02,667 INFO L125 PetriNetUnfolderBase]: For 162098/162098 co-relation queries the response was YES. [2024-06-14 11:27:02,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26416 conditions, 3237 events. 1935/3237 cut-off events. For 162098/162098 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19192 event pairs, 755 based on Foata normal form. 2/3238 useless extension candidates. Maximal degree in co-relation 26278. Up to 2921 conditions per place. [2024-06-14 11:27:02,704 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 349 selfloop transitions, 33 changer transitions 0/388 dead transitions. [2024-06-14 11:27:02,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 388 transitions, 7650 flow [2024-06-14 11:27:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:27:02,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-14 11:27:02,706 INFO L175 Difference]: Start difference. First operand has 271 places, 370 transitions, 6775 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:27:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 388 transitions, 7650 flow [2024-06-14 11:27:03,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 388 transitions, 7549 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:27:03,047 INFO L231 Difference]: Finished difference. Result has 275 places, 372 transitions, 6797 flow [2024-06-14 11:27:03,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6797, PETRI_PLACES=275, PETRI_TRANSITIONS=372} [2024-06-14 11:27:03,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 11:27:03,047 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 372 transitions, 6797 flow [2024-06-14 11:27:03,047 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) [2024-06-14 11:27:03,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:03,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:03,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:27:03,048 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)] === [2024-06-14 11:27:03,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash 620036579, now seen corresponding path program 4 times [2024-06-14 11:27:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334639925] [2024-06-14 11:27:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:03,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:03,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334639925] [2024-06-14 11:27:03,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334639925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:03,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:03,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:27:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852557906] [2024-06-14 11:27:03,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:03,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:27:03,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:27:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:27:03,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:03,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 372 transitions, 6797 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) [2024-06-14 11:27:03,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:03,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:03,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:03,800 INFO L124 PetriNetUnfolderBase]: 1976/3290 cut-off events. [2024-06-14 11:27:03,801 INFO L125 PetriNetUnfolderBase]: For 175485/175485 co-relation queries the response was YES. [2024-06-14 11:27:03,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27190 conditions, 3290 events. 1976/3290 cut-off events. For 175485/175485 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19502 event pairs, 756 based on Foata normal form. 2/3291 useless extension candidates. Maximal degree in co-relation 27051. Up to 2898 conditions per place. [2024-06-14 11:27:03,836 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 353 selfloop transitions, 37 changer transitions 0/396 dead transitions. [2024-06-14 11:27:03,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 396 transitions, 7862 flow [2024-06-14 11:27:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:27:03,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:27:03,837 INFO L175 Difference]: Start difference. First operand has 275 places, 372 transitions, 6797 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:27:03,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 396 transitions, 7862 flow [2024-06-14 11:27:04,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 396 transitions, 7750 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 11:27:04,231 INFO L231 Difference]: Finished difference. Result has 277 places, 375 transitions, 6836 flow [2024-06-14 11:27:04,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6836, PETRI_PLACES=277, PETRI_TRANSITIONS=375} [2024-06-14 11:27:04,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-14 11:27:04,231 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 375 transitions, 6836 flow [2024-06-14 11:27:04,231 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) [2024-06-14 11:27:04,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:04,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:04,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:27:04,232 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)] === [2024-06-14 11:27:04,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1857499053, now seen corresponding path program 1 times [2024-06-14 11:27:04,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:04,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537893714] [2024-06-14 11:27:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:04,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:04,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537893714] [2024-06-14 11:27:04,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537893714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:04,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:04,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:04,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217249542] [2024-06-14 11:27:04,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:04,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:04,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:04,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 375 transitions, 6836 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:04,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:04,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:04,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:05,010 INFO L124 PetriNetUnfolderBase]: 2074/3445 cut-off events. [2024-06-14 11:27:05,010 INFO L125 PetriNetUnfolderBase]: For 194960/194960 co-relation queries the response was YES. [2024-06-14 11:27:05,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28494 conditions, 3445 events. 2074/3445 cut-off events. For 194960/194960 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20461 event pairs, 425 based on Foata normal form. 6/3448 useless extension candidates. Maximal degree in co-relation 28353. Up to 2946 conditions per place. [2024-06-14 11:27:05,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 52 changer transitions 0/415 dead transitions. [2024-06-14 11:27:05,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 415 transitions, 8052 flow [2024-06-14 11:27:05,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:27:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:27:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 11:27:05,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 11:27:05,049 INFO L175 Difference]: Start difference. First operand has 277 places, 375 transitions, 6836 flow. Second operand 9 states and 192 transitions. [2024-06-14 11:27:05,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 415 transitions, 8052 flow [2024-06-14 11:27:05,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 415 transitions, 7960 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:27:05,510 INFO L231 Difference]: Finished difference. Result has 283 places, 383 transitions, 6992 flow [2024-06-14 11:27:05,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6744, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6992, PETRI_PLACES=283, PETRI_TRANSITIONS=383} [2024-06-14 11:27:05,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 11:27:05,511 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 383 transitions, 6992 flow [2024-06-14 11:27:05,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:05,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:05,511 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] [2024-06-14 11:27:05,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:27:05,511 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)] === [2024-06-14 11:27:05,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash 56160561, now seen corresponding path program 2 times [2024-06-14 11:27:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:05,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225140219] [2024-06-14 11:27:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:05,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:05,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225140219] [2024-06-14 11:27:05,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225140219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:05,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:05,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:05,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109572160] [2024-06-14 11:27:05,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:05,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:05,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 383 transitions, 6992 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:05,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:05,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:05,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:06,356 INFO L124 PetriNetUnfolderBase]: 2061/3424 cut-off events. [2024-06-14 11:27:06,357 INFO L125 PetriNetUnfolderBase]: For 191230/191230 co-relation queries the response was YES. [2024-06-14 11:27:06,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28331 conditions, 3424 events. 2061/3424 cut-off events. For 191230/191230 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20271 event pairs, 427 based on Foata normal form. 6/3427 useless extension candidates. Maximal degree in co-relation 28185. Up to 3005 conditions per place. [2024-06-14 11:27:06,390 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 49 changer transitions 0/410 dead transitions. [2024-06-14 11:27:06,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 410 transitions, 7975 flow [2024-06-14 11:27:06,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:27:06,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:27:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 11:27:06,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-14 11:27:06,391 INFO L175 Difference]: Start difference. First operand has 283 places, 383 transitions, 6992 flow. Second operand 9 states and 187 transitions. [2024-06-14 11:27:06,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 410 transitions, 7975 flow [2024-06-14 11:27:06,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 410 transitions, 7887 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:27:06,793 INFO L231 Difference]: Finished difference. Result has 289 places, 385 transitions, 7043 flow [2024-06-14 11:27:06,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7043, PETRI_PLACES=289, PETRI_TRANSITIONS=385} [2024-06-14 11:27:06,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-14 11:27:06,794 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 385 transitions, 7043 flow [2024-06-14 11:27:06,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:06,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:06,794 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] [2024-06-14 11:27:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:27:06,794 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)] === [2024-06-14 11:27:06,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2094971819, now seen corresponding path program 1 times [2024-06-14 11:27:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737766922] [2024-06-14 11:27:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:06,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:06,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737766922] [2024-06-14 11:27:06,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737766922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:06,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:06,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:06,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445602802] [2024-06-14 11:27:06,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:06,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:06,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:06,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:06,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 385 transitions, 7043 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:06,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:06,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:06,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:07,561 INFO L124 PetriNetUnfolderBase]: 2066/3437 cut-off events. [2024-06-14 11:27:07,561 INFO L125 PetriNetUnfolderBase]: For 189309/189309 co-relation queries the response was YES. [2024-06-14 11:27:07,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28562 conditions, 3437 events. 2066/3437 cut-off events. For 189309/189309 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 20489 event pairs, 454 based on Foata normal form. 1/3432 useless extension candidates. Maximal degree in co-relation 28413. Up to 2903 conditions per place. [2024-06-14 11:27:07,601 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 282 selfloop transitions, 118 changer transitions 0/406 dead transitions. [2024-06-14 11:27:07,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 406 transitions, 8076 flow [2024-06-14 11:27:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:27:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:27:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:27:07,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:27:07,602 INFO L175 Difference]: Start difference. First operand has 289 places, 385 transitions, 7043 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:27:07,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 406 transitions, 8076 flow [2024-06-14 11:27:08,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 406 transitions, 7980 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:27:08,042 INFO L231 Difference]: Finished difference. Result has 290 places, 388 transitions, 7254 flow [2024-06-14 11:27:08,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6947, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7254, PETRI_PLACES=290, PETRI_TRANSITIONS=388} [2024-06-14 11:27:08,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-14 11:27:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 388 transitions, 7254 flow [2024-06-14 11:27:08,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:08,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:08,043 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] [2024-06-14 11:27:08,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:27:08,043 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)] === [2024-06-14 11:27:08,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash 146702661, now seen corresponding path program 1 times [2024-06-14 11:27:08,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:08,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072614633] [2024-06-14 11:27:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:08,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:08,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072614633] [2024-06-14 11:27:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072614633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:08,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714238602] [2024-06-14 11:27:08,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:08,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:08,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:08,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 388 transitions, 7254 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:08,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:08,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:08,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:08,939 INFO L124 PetriNetUnfolderBase]: 2211/3673 cut-off events. [2024-06-14 11:27:08,939 INFO L125 PetriNetUnfolderBase]: For 210308/210308 co-relation queries the response was YES. [2024-06-14 11:27:08,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31489 conditions, 3673 events. 2211/3673 cut-off events. For 210308/210308 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22090 event pairs, 453 based on Foata normal form. 1/3671 useless extension candidates. Maximal degree in co-relation 31339. Up to 2964 conditions per place. [2024-06-14 11:27:08,977 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 283 selfloop transitions, 195 changer transitions 0/484 dead transitions. [2024-06-14 11:27:08,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 484 transitions, 9921 flow [2024-06-14 11:27:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-14 11:27:08,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-14 11:27:08,978 INFO L175 Difference]: Start difference. First operand has 290 places, 388 transitions, 7254 flow. Second operand 11 states and 240 transitions. [2024-06-14 11:27:08,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 484 transitions, 9921 flow [2024-06-14 11:27:09,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 484 transitions, 9547 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:27:09,487 INFO L231 Difference]: Finished difference. Result has 299 places, 433 transitions, 8437 flow [2024-06-14 11:27:09,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8437, PETRI_PLACES=299, PETRI_TRANSITIONS=433} [2024-06-14 11:27:09,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 11:27:09,488 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 433 transitions, 8437 flow [2024-06-14 11:27:09,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:09,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:09,488 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] [2024-06-14 11:27:09,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:27:09,488 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)] === [2024-06-14 11:27:09,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2094851849, now seen corresponding path program 2 times [2024-06-14 11:27:09,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:09,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22944170] [2024-06-14 11:27:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:09,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:09,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:09,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22944170] [2024-06-14 11:27:09,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22944170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:09,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:09,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:09,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622254682] [2024-06-14 11:27:09,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:09,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:09,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:09,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:09,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 433 transitions, 8437 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:09,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:09,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:09,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:10,335 INFO L124 PetriNetUnfolderBase]: 2205/3661 cut-off events. [2024-06-14 11:27:10,335 INFO L125 PetriNetUnfolderBase]: For 213769/213769 co-relation queries the response was YES. [2024-06-14 11:27:10,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32209 conditions, 3661 events. 2205/3661 cut-off events. For 213769/213769 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21946 event pairs, 454 based on Foata normal form. 2/3658 useless extension candidates. Maximal degree in co-relation 32055. Up to 3057 conditions per place. [2024-06-14 11:27:10,381 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 304 selfloop transitions, 143 changer transitions 0/453 dead transitions. [2024-06-14 11:27:10,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 453 transitions, 9429 flow [2024-06-14 11:27:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:27:10,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-14 11:27:10,382 INFO L175 Difference]: Start difference. First operand has 299 places, 433 transitions, 8437 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:27:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 453 transitions, 9429 flow [2024-06-14 11:27:10,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 453 transitions, 9257 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 11:27:10,950 INFO L231 Difference]: Finished difference. Result has 303 places, 433 transitions, 8581 flow [2024-06-14 11:27:10,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8271, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8581, PETRI_PLACES=303, PETRI_TRANSITIONS=433} [2024-06-14 11:27:10,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-14 11:27:10,950 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 433 transitions, 8581 flow [2024-06-14 11:27:10,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:10,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:10,951 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] [2024-06-14 11:27:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:27:10,951 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)] === [2024-06-14 11:27:10,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash 411976021, now seen corresponding path program 3 times [2024-06-14 11:27:10,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:10,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757429153] [2024-06-14 11:27:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:11,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:11,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757429153] [2024-06-14 11:27:11,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757429153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:11,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:11,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:11,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847249321] [2024-06-14 11:27:11,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:11,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:11,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:11,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:11,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 433 transitions, 8581 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:11,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:11,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:11,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:11,923 INFO L124 PetriNetUnfolderBase]: 2261/3753 cut-off events. [2024-06-14 11:27:11,923 INFO L125 PetriNetUnfolderBase]: For 227963/227963 co-relation queries the response was YES. [2024-06-14 11:27:11,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33083 conditions, 3753 events. 2261/3753 cut-off events. For 227963/227963 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22545 event pairs, 332 based on Foata normal form. 6/3754 useless extension candidates. Maximal degree in co-relation 32927. Up to 3027 conditions per place. [2024-06-14 11:27:11,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 57 changer transitions 0/470 dead transitions. [2024-06-14 11:27:11,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 470 transitions, 9881 flow [2024-06-14 11:27:11,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:27:11,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:27:11,972 INFO L175 Difference]: Start difference. First operand has 303 places, 433 transitions, 8581 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:27:11,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 470 transitions, 9881 flow [2024-06-14 11:27:12,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 470 transitions, 9502 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 11:27:12,585 INFO L231 Difference]: Finished difference. Result has 305 places, 440 transitions, 8433 flow [2024-06-14 11:27:12,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8204, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8433, PETRI_PLACES=305, PETRI_TRANSITIONS=440} [2024-06-14 11:27:12,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-14 11:27:12,586 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 440 transitions, 8433 flow [2024-06-14 11:27:12,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:12,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:12,586 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] [2024-06-14 11:27:12,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:27:12,586 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)] === [2024-06-14 11:27:12,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash 254286577, now seen corresponding path program 3 times [2024-06-14 11:27:12,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:12,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178984542] [2024-06-14 11:27:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:12,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:12,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178984542] [2024-06-14 11:27:12,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178984542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:12,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:12,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847619369] [2024-06-14 11:27:12,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:12,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:12,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:12,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:12,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 440 transitions, 8433 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:12,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:12,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:12,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:13,438 INFO L124 PetriNetUnfolderBase]: 2282/3795 cut-off events. [2024-06-14 11:27:13,438 INFO L125 PetriNetUnfolderBase]: For 225643/225652 co-relation queries the response was YES. [2024-06-14 11:27:13,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33441 conditions, 3795 events. 2282/3795 cut-off events. For 225643/225652 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23017 event pairs, 520 based on Foata normal form. 7/3789 useless extension candidates. Maximal degree in co-relation 33284. Up to 3056 conditions per place. [2024-06-14 11:27:13,486 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 145 changer transitions 0/470 dead transitions. [2024-06-14 11:27:13,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 470 transitions, 9856 flow [2024-06-14 11:27:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:27:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:27:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:27:13,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 11:27:13,487 INFO L175 Difference]: Start difference. First operand has 305 places, 440 transitions, 8433 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:27:13,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 470 transitions, 9856 flow [2024-06-14 11:27:14,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 470 transitions, 9749 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 11:27:14,141 INFO L231 Difference]: Finished difference. Result has 309 places, 449 transitions, 8791 flow [2024-06-14 11:27:14,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8326, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8791, PETRI_PLACES=309, PETRI_TRANSITIONS=449} [2024-06-14 11:27:14,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-14 11:27:14,141 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 449 transitions, 8791 flow [2024-06-14 11:27:14,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:14,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:14,141 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] [2024-06-14 11:27:14,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:27:14,142 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)] === [2024-06-14 11:27:14,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2023970521, now seen corresponding path program 4 times [2024-06-14 11:27:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:14,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220217261] [2024-06-14 11:27:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:14,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:14,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:14,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220217261] [2024-06-14 11:27:14,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220217261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:14,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:14,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539136998] [2024-06-14 11:27:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:14,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:14,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:14,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 449 transitions, 8791 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:14,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:14,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:14,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:15,069 INFO L124 PetriNetUnfolderBase]: 2295/3821 cut-off events. [2024-06-14 11:27:15,070 INFO L125 PetriNetUnfolderBase]: For 234765/234774 co-relation queries the response was YES. [2024-06-14 11:27:15,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33862 conditions, 3821 events. 2295/3821 cut-off events. For 234765/234774 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23255 event pairs, 519 based on Foata normal form. 7/3815 useless extension candidates. Maximal degree in co-relation 33703. Up to 3071 conditions per place. [2024-06-14 11:27:15,113 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 145 changer transitions 0/473 dead transitions. [2024-06-14 11:27:15,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 473 transitions, 10169 flow [2024-06-14 11:27:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:27:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:27:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 11:27:15,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-14 11:27:15,114 INFO L175 Difference]: Start difference. First operand has 309 places, 449 transitions, 8791 flow. Second operand 7 states and 148 transitions. [2024-06-14 11:27:15,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 473 transitions, 10169 flow [2024-06-14 11:27:15,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 473 transitions, 9737 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 11:27:15,747 INFO L231 Difference]: Finished difference. Result has 311 places, 455 transitions, 8788 flow [2024-06-14 11:27:15,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8399, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8788, PETRI_PLACES=311, PETRI_TRANSITIONS=455} [2024-06-14 11:27:15,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 11:27:15,747 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 455 transitions, 8788 flow [2024-06-14 11:27:15,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:15,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:15,748 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] [2024-06-14 11:27:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:27:15,748 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)] === [2024-06-14 11:27:15,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1352137389, now seen corresponding path program 1 times [2024-06-14 11:27:15,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:15,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739696290] [2024-06-14 11:27:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:15,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:15,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:15,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739696290] [2024-06-14 11:27:15,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739696290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:15,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:15,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:15,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819502076] [2024-06-14 11:27:15,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:15,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:15,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:15,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:15,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 455 transitions, 8788 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:15,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:15,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:15,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:16,637 INFO L124 PetriNetUnfolderBase]: 2345/3909 cut-off events. [2024-06-14 11:27:16,637 INFO L125 PetriNetUnfolderBase]: For 246861/246870 co-relation queries the response was YES. [2024-06-14 11:27:16,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34875 conditions, 3909 events. 2345/3909 cut-off events. For 246861/246870 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23978 event pairs, 651 based on Foata normal form. 8/3909 useless extension candidates. Maximal degree in co-relation 34717. Up to 3233 conditions per place. [2024-06-14 11:27:16,687 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 308 selfloop transitions, 194 changer transitions 0/508 dead transitions. [2024-06-14 11:27:16,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 508 transitions, 11012 flow [2024-06-14 11:27:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:27:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:27:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 11:27:16,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 11:27:16,688 INFO L175 Difference]: Start difference. First operand has 311 places, 455 transitions, 8788 flow. Second operand 10 states and 211 transitions. [2024-06-14 11:27:16,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 508 transitions, 11012 flow [2024-06-14 11:27:17,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 508 transitions, 10789 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:27:17,405 INFO L231 Difference]: Finished difference. Result has 321 places, 482 transitions, 9782 flow [2024-06-14 11:27:17,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9782, PETRI_PLACES=321, PETRI_TRANSITIONS=482} [2024-06-14 11:27:17,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 11:27:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 482 transitions, 9782 flow [2024-06-14 11:27:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:17,405 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] [2024-06-14 11:27:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:27:17,405 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)] === [2024-06-14 11:27:17,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash 515996307, now seen corresponding path program 5 times [2024-06-14 11:27:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968136149] [2024-06-14 11:27:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:17,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:17,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968136149] [2024-06-14 11:27:17,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968136149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:17,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:17,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:17,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952165637] [2024-06-14 11:27:17,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:17,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:17,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:17,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:17,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 482 transitions, 9782 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:17,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:17,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:17,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:18,337 INFO L124 PetriNetUnfolderBase]: 2342/3877 cut-off events. [2024-06-14 11:27:18,337 INFO L125 PetriNetUnfolderBase]: For 250778/250778 co-relation queries the response was YES. [2024-06-14 11:27:18,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35278 conditions, 3877 events. 2342/3877 cut-off events. For 250778/250778 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23495 event pairs, 528 based on Foata normal form. 1/3858 useless extension candidates. Maximal degree in co-relation 35115. Up to 3118 conditions per place. [2024-06-14 11:27:18,470 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 334 selfloop transitions, 167 changer transitions 0/507 dead transitions. [2024-06-14 11:27:18,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 507 transitions, 11146 flow [2024-06-14 11:27:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:27:18,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:27:18,471 INFO L175 Difference]: Start difference. First operand has 321 places, 482 transitions, 9782 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:27:18,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 507 transitions, 11146 flow [2024-06-14 11:27:19,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 507 transitions, 10866 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 11:27:19,158 INFO L231 Difference]: Finished difference. Result has 325 places, 482 transitions, 9848 flow [2024-06-14 11:27:19,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9508, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9848, PETRI_PLACES=325, PETRI_TRANSITIONS=482} [2024-06-14 11:27:19,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 11:27:19,159 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 482 transitions, 9848 flow [2024-06-14 11:27:19,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:19,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:19,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:27:19,159 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)] === [2024-06-14 11:27:19,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1998383911, now seen corresponding path program 2 times [2024-06-14 11:27:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:19,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854965609] [2024-06-14 11:27:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:19,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:19,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854965609] [2024-06-14 11:27:19,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854965609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:19,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824177584] [2024-06-14 11:27:19,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:19,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:19,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:19,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:19,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:19,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:19,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 482 transitions, 9848 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:19,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:19,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:19,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:20,133 INFO L124 PetriNetUnfolderBase]: 2499/4140 cut-off events. [2024-06-14 11:27:20,133 INFO L125 PetriNetUnfolderBase]: For 272012/272012 co-relation queries the response was YES. [2024-06-14 11:27:20,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37667 conditions, 4140 events. 2499/4140 cut-off events. For 272012/272012 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25481 event pairs, 513 based on Foata normal form. 1/4124 useless extension candidates. Maximal degree in co-relation 37503. Up to 2957 conditions per place. [2024-06-14 11:27:20,190 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 271 selfloop transitions, 308 changer transitions 0/585 dead transitions. [2024-06-14 11:27:20,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 585 transitions, 12892 flow [2024-06-14 11:27:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:27:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:27:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-14 11:27:20,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-14 11:27:20,191 INFO L175 Difference]: Start difference. First operand has 325 places, 482 transitions, 9848 flow. Second operand 12 states and 253 transitions. [2024-06-14 11:27:20,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 585 transitions, 12892 flow [2024-06-14 11:27:20,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 585 transitions, 11985 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-14 11:27:20,912 INFO L231 Difference]: Finished difference. Result has 332 places, 540 transitions, 10558 flow [2024-06-14 11:27:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9120, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10558, PETRI_PLACES=332, PETRI_TRANSITIONS=540} [2024-06-14 11:27:20,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-14 11:27:20,913 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 540 transitions, 10558 flow [2024-06-14 11:27:20,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:20,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:20,913 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] [2024-06-14 11:27:20,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:27:20,913 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)] === [2024-06-14 11:27:20,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1700092257, now seen corresponding path program 6 times [2024-06-14 11:27:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:20,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093790220] [2024-06-14 11:27:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:21,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:21,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093790220] [2024-06-14 11:27:21,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093790220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:21,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:21,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617786980] [2024-06-14 11:27:21,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:21,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:21,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:21,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 540 transitions, 10558 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:21,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:21,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:21,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:21,995 INFO L124 PetriNetUnfolderBase]: 2509/4149 cut-off events. [2024-06-14 11:27:21,996 INFO L125 PetriNetUnfolderBase]: For 284113/284113 co-relation queries the response was YES. [2024-06-14 11:27:22,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38075 conditions, 4149 events. 2509/4149 cut-off events. For 284113/284113 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25509 event pairs, 549 based on Foata normal form. 2/4129 useless extension candidates. Maximal degree in co-relation 37908. Up to 3294 conditions per place. [2024-06-14 11:27:22,046 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 344 selfloop transitions, 218 changer transitions 0/568 dead transitions. [2024-06-14 11:27:22,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 568 transitions, 12019 flow [2024-06-14 11:27:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 11:27:22,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-14 11:27:22,047 INFO L175 Difference]: Start difference. First operand has 332 places, 540 transitions, 10558 flow. Second operand 8 states and 165 transitions. [2024-06-14 11:27:22,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 568 transitions, 12019 flow [2024-06-14 11:27:22,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 568 transitions, 11759 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-14 11:27:22,821 INFO L231 Difference]: Finished difference. Result has 338 places, 546 transitions, 10845 flow [2024-06-14 11:27:22,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10312, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10845, PETRI_PLACES=338, PETRI_TRANSITIONS=546} [2024-06-14 11:27:22,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-14 11:27:22,822 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 546 transitions, 10845 flow [2024-06-14 11:27:22,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:22,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:22,822 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] [2024-06-14 11:27:22,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:27:22,823 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)] === [2024-06-14 11:27:22,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:22,823 INFO L85 PathProgramCache]: Analyzing trace with hash -366117517, now seen corresponding path program 3 times [2024-06-14 11:27:22,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:22,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244552781] [2024-06-14 11:27:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:22,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:22,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:22,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244552781] [2024-06-14 11:27:22,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244552781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:22,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:22,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:22,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027311890] [2024-06-14 11:27:22,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:22,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:22,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:23,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:23,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 546 transitions, 10845 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:23,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:23,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:23,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:23,907 INFO L124 PetriNetUnfolderBase]: 2522/4183 cut-off events. [2024-06-14 11:27:23,907 INFO L125 PetriNetUnfolderBase]: For 288405/288405 co-relation queries the response was YES. [2024-06-14 11:27:23,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38307 conditions, 4183 events. 2522/4183 cut-off events. For 288405/288405 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 25842 event pairs, 514 based on Foata normal form. 1/4167 useless extension candidates. Maximal degree in co-relation 38137. Up to 2975 conditions per place. [2024-06-14 11:27:23,965 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 271 selfloop transitions, 319 changer transitions 0/596 dead transitions. [2024-06-14 11:27:23,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 596 transitions, 13305 flow [2024-06-14 11:27:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:27:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:27:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-14 11:27:23,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-14 11:27:23,966 INFO L175 Difference]: Start difference. First operand has 338 places, 546 transitions, 10845 flow. Second operand 13 states and 270 transitions. [2024-06-14 11:27:23,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 596 transitions, 13305 flow [2024-06-14 11:27:24,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 596 transitions, 12989 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 11:27:24,887 INFO L231 Difference]: Finished difference. Result has 346 places, 552 transitions, 11278 flow [2024-06-14 11:27:24,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10536, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11278, PETRI_PLACES=346, PETRI_TRANSITIONS=552} [2024-06-14 11:27:24,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 11:27:24,888 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 552 transitions, 11278 flow [2024-06-14 11:27:24,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:24,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:24,889 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] [2024-06-14 11:27:24,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:27:24,889 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)] === [2024-06-14 11:27:24,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1690099407, now seen corresponding path program 7 times [2024-06-14 11:27:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415992060] [2024-06-14 11:27:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:24,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:25,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:25,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415992060] [2024-06-14 11:27:25,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415992060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:25,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:25,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:25,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824146370] [2024-06-14 11:27:25,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:25,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:25,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:25,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:25,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 552 transitions, 11278 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:25,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:25,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:25,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:26,046 INFO L124 PetriNetUnfolderBase]: 2516/4169 cut-off events. [2024-06-14 11:27:26,046 INFO L125 PetriNetUnfolderBase]: For 297780/297780 co-relation queries the response was YES. [2024-06-14 11:27:26,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38521 conditions, 4169 events. 2516/4169 cut-off events. For 297780/297780 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 25711 event pairs, 536 based on Foata normal form. 2/4150 useless extension candidates. Maximal degree in co-relation 38349. Up to 3306 conditions per place. [2024-06-14 11:27:26,106 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 351 selfloop transitions, 215 changer transitions 0/572 dead transitions. [2024-06-14 11:27:26,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 572 transitions, 12774 flow [2024-06-14 11:27:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:27:26,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-14 11:27:26,108 INFO L175 Difference]: Start difference. First operand has 346 places, 552 transitions, 11278 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:27:26,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 572 transitions, 12774 flow [2024-06-14 11:27:27,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 572 transitions, 12160 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 11:27:27,070 INFO L231 Difference]: Finished difference. Result has 347 places, 552 transitions, 11114 flow [2024-06-14 11:27:27,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10672, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11114, PETRI_PLACES=347, PETRI_TRANSITIONS=552} [2024-06-14 11:27:27,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 11:27:27,071 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 552 transitions, 11114 flow [2024-06-14 11:27:27,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:27,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:27,071 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] [2024-06-14 11:27:27,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:27:27,071 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)] === [2024-06-14 11:27:27,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2007638155, now seen corresponding path program 8 times [2024-06-14 11:27:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:27,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169876298] [2024-06-14 11:27:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:27,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169876298] [2024-06-14 11:27:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169876298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:27,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:27,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:27,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996940264] [2024-06-14 11:27:27,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:27,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:27,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:27,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:27,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:27,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:27,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 552 transitions, 11114 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:27,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:27,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:27,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:28,077 INFO L124 PetriNetUnfolderBase]: 2510/4160 cut-off events. [2024-06-14 11:27:28,077 INFO L125 PetriNetUnfolderBase]: For 299896/299896 co-relation queries the response was YES. [2024-06-14 11:27:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38220 conditions, 4160 events. 2510/4160 cut-off events. For 299896/299896 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 25652 event pairs, 548 based on Foata normal form. 2/4141 useless extension candidates. Maximal degree in co-relation 38047. Up to 3300 conditions per place. [2024-06-14 11:27:28,135 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 349 selfloop transitions, 216 changer transitions 0/571 dead transitions. [2024-06-14 11:27:28,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 571 transitions, 12472 flow [2024-06-14 11:27:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:27:28,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-14 11:27:28,136 INFO L175 Difference]: Start difference. First operand has 347 places, 552 transitions, 11114 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:27:28,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 571 transitions, 12472 flow [2024-06-14 11:27:29,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 571 transitions, 11873 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 11:27:29,062 INFO L231 Difference]: Finished difference. Result has 348 places, 552 transitions, 10957 flow [2024-06-14 11:27:29,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10515, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10957, PETRI_PLACES=348, PETRI_TRANSITIONS=552} [2024-06-14 11:27:29,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 11:27:29,063 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 552 transitions, 10957 flow [2024-06-14 11:27:29,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:29,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:29,063 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] [2024-06-14 11:27:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:27:29,063 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)] === [2024-06-14 11:27:29,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1170297823, now seen corresponding path program 4 times [2024-06-14 11:27:29,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:29,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901554854] [2024-06-14 11:27:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:29,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:29,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:29,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901554854] [2024-06-14 11:27:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901554854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:29,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174123783] [2024-06-14 11:27:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:29,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:29,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:29,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:29,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:29,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 552 transitions, 10957 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:29,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:29,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:29,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:30,175 INFO L124 PetriNetUnfolderBase]: 2507/4170 cut-off events. [2024-06-14 11:27:30,175 INFO L125 PetriNetUnfolderBase]: For 299407/299407 co-relation queries the response was YES. [2024-06-14 11:27:30,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38061 conditions, 4170 events. 2507/4170 cut-off events. For 299407/299407 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 25892 event pairs, 516 based on Foata normal form. 1/4154 useless extension candidates. Maximal degree in co-relation 37888. Up to 2965 conditions per place. [2024-06-14 11:27:30,226 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 269 selfloop transitions, 318 changer transitions 0/593 dead transitions. [2024-06-14 11:27:30,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 593 transitions, 13216 flow [2024-06-14 11:27:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 11:27:30,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-14 11:27:30,227 INFO L175 Difference]: Start difference. First operand has 348 places, 552 transitions, 10957 flow. Second operand 11 states and 237 transitions. [2024-06-14 11:27:30,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 593 transitions, 13216 flow [2024-06-14 11:27:31,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 593 transitions, 12539 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 11:27:31,262 INFO L231 Difference]: Finished difference. Result has 351 places, 552 transitions, 10946 flow [2024-06-14 11:27:31,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10304, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10946, PETRI_PLACES=351, PETRI_TRANSITIONS=552} [2024-06-14 11:27:31,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-14 11:27:31,262 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 552 transitions, 10946 flow [2024-06-14 11:27:31,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:31,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:31,262 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] [2024-06-14 11:27:31,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:27:31,262 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)] === [2024-06-14 11:27:31,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1031116979, now seen corresponding path program 2 times [2024-06-14 11:27:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:31,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951918375] [2024-06-14 11:27:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:31,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951918375] [2024-06-14 11:27:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951918375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:31,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:31,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711454321] [2024-06-14 11:27:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:31,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:31,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:31,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 552 transitions, 10946 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:31,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:31,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:31,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:32,333 INFO L124 PetriNetUnfolderBase]: 2525/4211 cut-off events. [2024-06-14 11:27:32,333 INFO L125 PetriNetUnfolderBase]: For 307966/307966 co-relation queries the response was YES. [2024-06-14 11:27:32,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38648 conditions, 4211 events. 2525/4211 cut-off events. For 307966/307966 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26280 event pairs, 657 based on Foata normal form. 1/4202 useless extension candidates. Maximal degree in co-relation 38475. Up to 3480 conditions per place. [2024-06-14 11:27:32,391 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 380 selfloop transitions, 204 changer transitions 0/590 dead transitions. [2024-06-14 11:27:32,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 590 transitions, 12908 flow [2024-06-14 11:27:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:27:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:27:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-14 11:27:32,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915572232645403 [2024-06-14 11:27:32,392 INFO L175 Difference]: Start difference. First operand has 351 places, 552 transitions, 10946 flow. Second operand 13 states and 262 transitions. [2024-06-14 11:27:32,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 590 transitions, 12908 flow [2024-06-14 11:27:33,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 590 transitions, 12260 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 11:27:33,459 INFO L231 Difference]: Finished difference. Result has 354 places, 561 transitions, 10932 flow [2024-06-14 11:27:33,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10310, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10932, PETRI_PLACES=354, PETRI_TRANSITIONS=561} [2024-06-14 11:27:33,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-14 11:27:33,460 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 561 transitions, 10932 flow [2024-06-14 11:27:33,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:33,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:33,460 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] [2024-06-14 11:27:33,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:27:33,460 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)] === [2024-06-14 11:27:33,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash 258310129, now seen corresponding path program 3 times [2024-06-14 11:27:33,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:33,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857635039] [2024-06-14 11:27:33,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:33,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:33,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:33,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857635039] [2024-06-14 11:27:33,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857635039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:33,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:33,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:33,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235224157] [2024-06-14 11:27:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:33,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:33,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:33,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 561 transitions, 10932 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:33,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:33,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:33,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:34,511 INFO L124 PetriNetUnfolderBase]: 2522/4209 cut-off events. [2024-06-14 11:27:34,511 INFO L125 PetriNetUnfolderBase]: For 311317/311317 co-relation queries the response was YES. [2024-06-14 11:27:34,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38338 conditions, 4209 events. 2522/4209 cut-off events. For 311317/311317 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26281 event pairs, 657 based on Foata normal form. 1/4200 useless extension candidates. Maximal degree in co-relation 38164. Up to 3477 conditions per place. [2024-06-14 11:27:34,571 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 379 selfloop transitions, 204 changer transitions 0/589 dead transitions. [2024-06-14 11:27:34,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 589 transitions, 12544 flow [2024-06-14 11:27:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:27:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:27:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 261 transitions. [2024-06-14 11:27:34,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896810506566604 [2024-06-14 11:27:34,572 INFO L175 Difference]: Start difference. First operand has 354 places, 561 transitions, 10932 flow. Second operand 13 states and 261 transitions. [2024-06-14 11:27:34,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 589 transitions, 12544 flow [2024-06-14 11:27:35,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 589 transitions, 12108 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 11:27:35,730 INFO L231 Difference]: Finished difference. Result has 358 places, 561 transitions, 10918 flow [2024-06-14 11:27:35,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10500, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10918, PETRI_PLACES=358, PETRI_TRANSITIONS=561} [2024-06-14 11:27:35,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 11:27:35,732 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 561 transitions, 10918 flow [2024-06-14 11:27:35,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:35,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:35,732 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] [2024-06-14 11:27:35,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:27:35,732 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)] === [2024-06-14 11:27:35,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash -995829341, now seen corresponding path program 4 times [2024-06-14 11:27:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:35,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52582020] [2024-06-14 11:27:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:35,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:35,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52582020] [2024-06-14 11:27:35,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52582020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:35,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:35,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:35,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257024064] [2024-06-14 11:27:35,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:35,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:35,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:35,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:35,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 561 transitions, 10918 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:35,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:35,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:35,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:36,746 INFO L124 PetriNetUnfolderBase]: 2532/4218 cut-off events. [2024-06-14 11:27:36,746 INFO L125 PetriNetUnfolderBase]: For 310885/310885 co-relation queries the response was YES. [2024-06-14 11:27:36,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38517 conditions, 4218 events. 2532/4218 cut-off events. For 310885/310885 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26211 event pairs, 486 based on Foata normal form. 2/4217 useless extension candidates. Maximal degree in co-relation 38343. Up to 3691 conditions per place. [2024-06-14 11:27:36,805 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 486 selfloop transitions, 94 changer transitions 0/586 dead transitions. [2024-06-14 11:27:36,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 586 transitions, 12482 flow [2024-06-14 11:27:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:27:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:27:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 11:27:36,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-14 11:27:36,806 INFO L175 Difference]: Start difference. First operand has 358 places, 561 transitions, 10918 flow. Second operand 10 states and 206 transitions. [2024-06-14 11:27:36,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 586 transitions, 12482 flow [2024-06-14 11:27:37,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 586 transitions, 12172 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:27:37,975 INFO L231 Difference]: Finished difference. Result has 357 places, 567 transitions, 10998 flow [2024-06-14 11:27:37,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10616, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10998, PETRI_PLACES=357, PETRI_TRANSITIONS=567} [2024-06-14 11:27:37,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 11:27:37,975 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 567 transitions, 10998 flow [2024-06-14 11:27:37,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:37,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:37,976 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] [2024-06-14 11:27:37,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:27:37,976 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)] === [2024-06-14 11:27:37,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash -919347437, now seen corresponding path program 9 times [2024-06-14 11:27:37,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:37,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907242888] [2024-06-14 11:27:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:37,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907242888] [2024-06-14 11:27:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907242888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:38,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:38,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154454380] [2024-06-14 11:27:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:38,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:38,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 567 transitions, 10998 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:38,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:38,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:38,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:38,999 INFO L124 PetriNetUnfolderBase]: 2526/4212 cut-off events. [2024-06-14 11:27:38,999 INFO L125 PetriNetUnfolderBase]: For 306918/306918 co-relation queries the response was YES. [2024-06-14 11:27:39,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38100 conditions, 4212 events. 2526/4212 cut-off events. For 306918/306918 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26197 event pairs, 492 based on Foata normal form. 2/4208 useless extension candidates. Maximal degree in co-relation 37925. Up to 3702 conditions per place. [2024-06-14 11:27:39,057 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 76 changer transitions 0/580 dead transitions. [2024-06-14 11:27:39,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 580 transitions, 12318 flow [2024-06-14 11:27:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:27:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:27:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:27:39,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-14 11:27:39,058 INFO L175 Difference]: Start difference. First operand has 357 places, 567 transitions, 10998 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:27:39,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 580 transitions, 12318 flow [2024-06-14 11:27:40,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 580 transitions, 12142 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 11:27:40,141 INFO L231 Difference]: Finished difference. Result has 358 places, 567 transitions, 10986 flow [2024-06-14 11:27:40,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10986, PETRI_PLACES=358, PETRI_TRANSITIONS=567} [2024-06-14 11:27:40,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 11:27:40,142 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 567 transitions, 10986 flow [2024-06-14 11:27:40,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:40,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:40,142 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] [2024-06-14 11:27:40,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:27:40,142 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)] === [2024-06-14 11:27:40,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1509187877, now seen corresponding path program 5 times [2024-06-14 11:27:40,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:40,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655939522] [2024-06-14 11:27:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:40,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:40,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:40,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655939522] [2024-06-14 11:27:40,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655939522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:40,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:40,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:40,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291453346] [2024-06-14 11:27:40,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:40,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:40,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:40,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:40,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 567 transitions, 10986 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:40,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:40,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:40,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:41,158 INFO L124 PetriNetUnfolderBase]: 2539/4234 cut-off events. [2024-06-14 11:27:41,158 INFO L125 PetriNetUnfolderBase]: For 306448/306448 co-relation queries the response was YES. [2024-06-14 11:27:41,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38299 conditions, 4234 events. 2539/4234 cut-off events. For 306448/306448 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26336 event pairs, 486 based on Foata normal form. 1/4232 useless extension candidates. Maximal degree in co-relation 38124. Up to 3665 conditions per place. [2024-06-14 11:27:41,216 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 486 selfloop transitions, 102 changer transitions 0/594 dead transitions. [2024-06-14 11:27:41,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 594 transitions, 12631 flow [2024-06-14 11:27:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 11:27:41,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49445676274944567 [2024-06-14 11:27:41,217 INFO L175 Difference]: Start difference. First operand has 358 places, 567 transitions, 10986 flow. Second operand 11 states and 223 transitions. [2024-06-14 11:27:41,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 594 transitions, 12631 flow [2024-06-14 11:27:42,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 594 transitions, 12448 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:27:42,390 INFO L231 Difference]: Finished difference. Result has 362 places, 573 transitions, 11168 flow [2024-06-14 11:27:42,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10803, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11168, PETRI_PLACES=362, PETRI_TRANSITIONS=573} [2024-06-14 11:27:42,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-14 11:27:42,391 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 573 transitions, 11168 flow [2024-06-14 11:27:42,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:42,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:42,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:42,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:27:42,392 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)] === [2024-06-14 11:27:42,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash -919336091, now seen corresponding path program 6 times [2024-06-14 11:27:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:42,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445480500] [2024-06-14 11:27:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:42,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:42,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:42,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445480500] [2024-06-14 11:27:42,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445480500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:42,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:42,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:42,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876509357] [2024-06-14 11:27:42,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:42,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:42,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:42,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:42,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:42,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:42,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 573 transitions, 11168 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:42,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:42,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:42,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:43,414 INFO L124 PetriNetUnfolderBase]: 2544/4241 cut-off events. [2024-06-14 11:27:43,415 INFO L125 PetriNetUnfolderBase]: For 315299/315299 co-relation queries the response was YES. [2024-06-14 11:27:43,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38591 conditions, 4241 events. 2544/4241 cut-off events. For 315299/315299 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26386 event pairs, 486 based on Foata normal form. 1/4239 useless extension candidates. Maximal degree in co-relation 38414. Up to 3669 conditions per place. [2024-06-14 11:27:43,474 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 483 selfloop transitions, 108 changer transitions 0/597 dead transitions. [2024-06-14 11:27:43,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 597 transitions, 12775 flow [2024-06-14 11:27:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 11:27:43,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49445676274944567 [2024-06-14 11:27:43,475 INFO L175 Difference]: Start difference. First operand has 362 places, 573 transitions, 11168 flow. Second operand 11 states and 223 transitions. [2024-06-14 11:27:43,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 597 transitions, 12775 flow [2024-06-14 11:27:44,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 597 transitions, 12596 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 11:27:44,543 INFO L231 Difference]: Finished difference. Result has 366 places, 576 transitions, 11271 flow [2024-06-14 11:27:44,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10991, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11271, PETRI_PLACES=366, PETRI_TRANSITIONS=576} [2024-06-14 11:27:44,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-14 11:27:44,543 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 576 transitions, 11271 flow [2024-06-14 11:27:44,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:44,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:44,544 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] [2024-06-14 11:27:44,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:27:44,544 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)] === [2024-06-14 11:27:44,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash 402194707, now seen corresponding path program 10 times [2024-06-14 11:27:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656297726] [2024-06-14 11:27:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656297726] [2024-06-14 11:27:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656297726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:44,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:44,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:44,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479115726] [2024-06-14 11:27:44,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:44,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:44,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 576 transitions, 11271 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:44,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:44,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:44,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:45,501 INFO L124 PetriNetUnfolderBase]: 2538/4232 cut-off events. [2024-06-14 11:27:45,501 INFO L125 PetriNetUnfolderBase]: For 320674/320674 co-relation queries the response was YES. [2024-06-14 11:27:45,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38513 conditions, 4232 events. 2538/4232 cut-off events. For 320674/320674 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26360 event pairs, 492 based on Foata normal form. 2/4229 useless extension candidates. Maximal degree in co-relation 38335. Up to 3721 conditions per place. [2024-06-14 11:27:45,560 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 505 selfloop transitions, 76 changer transitions 0/587 dead transitions. [2024-06-14 11:27:45,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 587 transitions, 12465 flow [2024-06-14 11:27:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:27:45,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-14 11:27:45,561 INFO L175 Difference]: Start difference. First operand has 366 places, 576 transitions, 11271 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:27:45,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 587 transitions, 12465 flow [2024-06-14 11:27:46,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 587 transitions, 12254 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 11:27:46,843 INFO L231 Difference]: Finished difference. Result has 367 places, 576 transitions, 11223 flow [2024-06-14 11:27:46,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11060, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11223, PETRI_PLACES=367, PETRI_TRANSITIONS=576} [2024-06-14 11:27:46,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-14 11:27:46,843 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 576 transitions, 11223 flow [2024-06-14 11:27:46,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:46,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:46,844 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] [2024-06-14 11:27:46,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:27:46,844 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)] === [2024-06-14 11:27:46,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:46,844 INFO L85 PathProgramCache]: Analyzing trace with hash 829992307, now seen corresponding path program 7 times [2024-06-14 11:27:46,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:46,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636701085] [2024-06-14 11:27:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:46,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:46,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:46,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636701085] [2024-06-14 11:27:46,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636701085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:46,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:46,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:27:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457991998] [2024-06-14 11:27:46,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:27:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:27:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:27:47,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:47,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 576 transitions, 11223 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:47,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:47,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:47,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:47,866 INFO L124 PetriNetUnfolderBase]: 2535/4231 cut-off events. [2024-06-14 11:27:47,866 INFO L125 PetriNetUnfolderBase]: For 322584/322584 co-relation queries the response was YES. [2024-06-14 11:27:47,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38433 conditions, 4231 events. 2535/4231 cut-off events. For 322584/322584 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 26355 event pairs, 486 based on Foata normal form. 1/4229 useless extension candidates. Maximal degree in co-relation 38254. Up to 3661 conditions per place. [2024-06-14 11:27:47,924 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 483 selfloop transitions, 107 changer transitions 0/596 dead transitions. [2024-06-14 11:27:47,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 596 transitions, 12632 flow [2024-06-14 11:27:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-14 11:27:47,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002217294900224 [2024-06-14 11:27:47,925 INFO L175 Difference]: Start difference. First operand has 367 places, 576 transitions, 11223 flow. Second operand 11 states and 221 transitions. [2024-06-14 11:27:47,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 596 transitions, 12632 flow [2024-06-14 11:27:49,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 596 transitions, 12437 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:27:49,158 INFO L231 Difference]: Finished difference. Result has 372 places, 576 transitions, 11248 flow [2024-06-14 11:27:49,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11028, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11248, PETRI_PLACES=372, PETRI_TRANSITIONS=576} [2024-06-14 11:27:49,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 11:27:49,159 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 576 transitions, 11248 flow [2024-06-14 11:27:49,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:49,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:49,160 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] [2024-06-14 11:27:49,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:27:49,160 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)] === [2024-06-14 11:27:49,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:49,160 INFO L85 PathProgramCache]: Analyzing trace with hash -919341485, now seen corresponding path program 5 times [2024-06-14 11:27:49,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:49,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767789331] [2024-06-14 11:27:49,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:49,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767789331] [2024-06-14 11:27:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767789331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:49,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:49,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884535735] [2024-06-14 11:27:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:49,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:27:49,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 576 transitions, 11248 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:49,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:49,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:27:49,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:50,197 INFO L124 PetriNetUnfolderBase]: 2529/4223 cut-off events. [2024-06-14 11:27:50,197 INFO L125 PetriNetUnfolderBase]: For 326889/326889 co-relation queries the response was YES. [2024-06-14 11:27:50,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38287 conditions, 4223 events. 2529/4223 cut-off events. For 326889/326889 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26337 event pairs, 486 based on Foata normal form. 2/4222 useless extension candidates. Maximal degree in co-relation 38107. Up to 3690 conditions per place. [2024-06-14 11:27:50,255 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 494 selfloop transitions, 94 changer transitions 0/594 dead transitions. [2024-06-14 11:27:50,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 594 transitions, 12507 flow [2024-06-14 11:27:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:27:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:27:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 11:27:50,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:27:50,256 INFO L175 Difference]: Start difference. First operand has 372 places, 576 transitions, 11248 flow. Second operand 10 states and 205 transitions. [2024-06-14 11:27:50,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 594 transitions, 12507 flow [2024-06-14 11:27:51,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 594 transitions, 12259 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 11:27:51,546 INFO L231 Difference]: Finished difference. Result has 372 places, 576 transitions, 11202 flow [2024-06-14 11:27:51,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11000, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11202, PETRI_PLACES=372, PETRI_TRANSITIONS=576} [2024-06-14 11:27:51,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 11:27:51,546 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 576 transitions, 11202 flow [2024-06-14 11:27:51,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:51,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:51,546 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] [2024-06-14 11:27:51,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:27:51,546 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)] === [2024-06-14 11:27:51,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash 753059949, now seen corresponding path program 4 times [2024-06-14 11:27:51,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:51,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285965739] [2024-06-14 11:27:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:51,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:51,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285965739] [2024-06-14 11:27:51,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285965739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:51,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:51,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:51,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888573525] [2024-06-14 11:27:51,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:51,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:51,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:51,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:51,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 576 transitions, 11202 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) [2024-06-14 11:27:51,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:51,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:51,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:52,528 INFO L124 PetriNetUnfolderBase]: 2549/4256 cut-off events. [2024-06-14 11:27:52,529 INFO L125 PetriNetUnfolderBase]: For 345526/345526 co-relation queries the response was YES. [2024-06-14 11:27:52,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38585 conditions, 4256 events. 2549/4256 cut-off events. For 345526/345526 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26541 event pairs, 342 based on Foata normal form. 6/4257 useless extension candidates. Maximal degree in co-relation 38404. Up to 3416 conditions per place. [2024-06-14 11:27:52,590 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 536 selfloop transitions, 60 changer transitions 0/602 dead transitions. [2024-06-14 11:27:52,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 602 transitions, 12731 flow [2024-06-14 11:27:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:27:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:27:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 11:27:52,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 11:27:52,591 INFO L175 Difference]: Start difference. First operand has 372 places, 576 transitions, 11202 flow. Second operand 7 states and 158 transitions. [2024-06-14 11:27:52,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 602 transitions, 12731 flow [2024-06-14 11:27:53,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 602 transitions, 12472 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:27:53,990 INFO L231 Difference]: Finished difference. Result has 368 places, 577 transitions, 11099 flow [2024-06-14 11:27:53,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10945, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11099, PETRI_PLACES=368, PETRI_TRANSITIONS=577} [2024-06-14 11:27:53,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 11:27:53,990 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 577 transitions, 11099 flow [2024-06-14 11:27:53,991 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) [2024-06-14 11:27:53,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:53,991 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] [2024-06-14 11:27:53,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:27:53,991 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)] === [2024-06-14 11:27:53,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash 812082059, now seen corresponding path program 5 times [2024-06-14 11:27:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:53,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497822766] [2024-06-14 11:27:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:53,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:54,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:54,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497822766] [2024-06-14 11:27:54,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497822766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:54,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:54,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:54,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882287975] [2024-06-14 11:27:54,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:54,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:54,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:54,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:54,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 577 transitions, 11099 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) [2024-06-14 11:27:54,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:54,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:54,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:55,007 INFO L124 PetriNetUnfolderBase]: 2536/4237 cut-off events. [2024-06-14 11:27:55,007 INFO L125 PetriNetUnfolderBase]: For 329875/329875 co-relation queries the response was YES. [2024-06-14 11:27:55,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38127 conditions, 4237 events. 2536/4237 cut-off events. For 329875/329875 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26454 event pairs, 335 based on Foata normal form. 6/4238 useless extension candidates. Maximal degree in co-relation 37947. Up to 3410 conditions per place. [2024-06-14 11:27:55,065 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 535 selfloop transitions, 58 changer transitions 0/599 dead transitions. [2024-06-14 11:27:55,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 599 transitions, 12446 flow [2024-06-14 11:27:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:27:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:27:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 11:27:55,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 11:27:55,066 INFO L175 Difference]: Start difference. First operand has 368 places, 577 transitions, 11099 flow. Second operand 6 states and 140 transitions. [2024-06-14 11:27:55,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 599 transitions, 12446 flow [2024-06-14 11:27:56,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 599 transitions, 12276 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:27:56,331 INFO L231 Difference]: Finished difference. Result has 368 places, 577 transitions, 11059 flow [2024-06-14 11:27:56,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11059, PETRI_PLACES=368, PETRI_TRANSITIONS=577} [2024-06-14 11:27:56,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 11:27:56,331 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 577 transitions, 11059 flow [2024-06-14 11:27:56,331 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) [2024-06-14 11:27:56,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:56,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:56,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:27:56,332 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)] === [2024-06-14 11:27:56,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:56,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1717557171, now seen corresponding path program 8 times [2024-06-14 11:27:56,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:56,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116672469] [2024-06-14 11:27:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:56,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:56,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:56,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116672469] [2024-06-14 11:27:56,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116672469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:56,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:56,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:27:56,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549632276] [2024-06-14 11:27:56,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:56,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:27:56,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:27:56,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:27:56,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:56,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 577 transitions, 11059 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) [2024-06-14 11:27:56,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:56,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:56,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:57,260 INFO L124 PetriNetUnfolderBase]: 2530/4228 cut-off events. [2024-06-14 11:27:57,261 INFO L125 PetriNetUnfolderBase]: For 306397/306397 co-relation queries the response was YES. [2024-06-14 11:27:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37537 conditions, 4228 events. 2530/4228 cut-off events. For 306397/306397 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26415 event pairs, 489 based on Foata normal form. 2/4225 useless extension candidates. Maximal degree in co-relation 37359. Up to 3419 conditions per place. [2024-06-14 11:27:57,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 375 selfloop transitions, 234 changer transitions 0/615 dead transitions. [2024-06-14 11:27:57,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 615 transitions, 12891 flow [2024-06-14 11:27:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 11:27:57,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 11:27:57,320 INFO L175 Difference]: Start difference. First operand has 368 places, 577 transitions, 11059 flow. Second operand 8 states and 183 transitions. [2024-06-14 11:27:57,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 615 transitions, 12891 flow [2024-06-14 11:27:58,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 615 transitions, 12746 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:27:58,512 INFO L231 Difference]: Finished difference. Result has 370 places, 588 transitions, 11689 flow [2024-06-14 11:27:58,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10920, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11689, PETRI_PLACES=370, PETRI_TRANSITIONS=588} [2024-06-14 11:27:58,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 11:27:58,513 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 588 transitions, 11689 flow [2024-06-14 11:27:58,513 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) [2024-06-14 11:27:58,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:58,513 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] [2024-06-14 11:27:58,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:27:58,513 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)] === [2024-06-14 11:27:58,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1352851757, now seen corresponding path program 6 times [2024-06-14 11:27:58,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:58,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628439283] [2024-06-14 11:27:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:58,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:58,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628439283] [2024-06-14 11:27:58,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628439283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:58,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:58,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:27:58,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146719762] [2024-06-14 11:27:58,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:58,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:27:58,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:58,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:27:58,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:27:58,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:58,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 588 transitions, 11689 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) [2024-06-14 11:27:58,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:58,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:58,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:59,502 INFO L124 PetriNetUnfolderBase]: 2534/4262 cut-off events. [2024-06-14 11:27:59,502 INFO L125 PetriNetUnfolderBase]: For 300962/300974 co-relation queries the response was YES. [2024-06-14 11:27:59,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37635 conditions, 4262 events. 2534/4262 cut-off events. For 300962/300974 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 27000 event pairs, 667 based on Foata normal form. 12/4265 useless extension candidates. Maximal degree in co-relation 37458. Up to 3499 conditions per place. [2024-06-14 11:27:59,557 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 391 selfloop transitions, 216 changer transitions 0/613 dead transitions. [2024-06-14 11:27:59,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 613 transitions, 13295 flow [2024-06-14 11:27:59,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:27:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:27:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 11:27:59,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 11:27:59,558 INFO L175 Difference]: Start difference. First operand has 370 places, 588 transitions, 11689 flow. Second operand 8 states and 173 transitions. [2024-06-14 11:27:59,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 613 transitions, 13295 flow [2024-06-14 11:28:00,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 613 transitions, 12877 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:00,698 INFO L231 Difference]: Finished difference. Result has 373 places, 596 transitions, 11908 flow [2024-06-14 11:28:00,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11280, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11908, PETRI_PLACES=373, PETRI_TRANSITIONS=596} [2024-06-14 11:28:00,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 11:28:00,699 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 596 transitions, 11908 flow [2024-06-14 11:28:00,699 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) [2024-06-14 11:28:00,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:00,699 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] [2024-06-14 11:28:00,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:28:00,699 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)] === [2024-06-14 11:28:00,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash 582531661, now seen corresponding path program 9 times [2024-06-14 11:28:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:00,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122357849] [2024-06-14 11:28:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:00,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:00,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122357849] [2024-06-14 11:28:00,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122357849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:00,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:00,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945357045] [2024-06-14 11:28:00,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:00,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:00,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:00,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:00,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 596 transitions, 11908 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) [2024-06-14 11:28:00,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:00,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:00,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:01,675 INFO L124 PetriNetUnfolderBase]: 2544/4232 cut-off events. [2024-06-14 11:28:01,675 INFO L125 PetriNetUnfolderBase]: For 288108/288108 co-relation queries the response was YES. [2024-06-14 11:28:01,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37547 conditions, 4232 events. 2544/4232 cut-off events. For 288108/288108 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 26407 event pairs, 550 based on Foata normal form. 2/4213 useless extension candidates. Maximal degree in co-relation 37369. Up to 3008 conditions per place. [2024-06-14 11:28:01,735 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 392 changer transitions 0/631 dead transitions. [2024-06-14 11:28:01,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 631 transitions, 13806 flow [2024-06-14 11:28:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:28:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:28:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 11:28:01,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 11:28:01,736 INFO L175 Difference]: Start difference. First operand has 373 places, 596 transitions, 11908 flow. Second operand 10 states and 214 transitions. [2024-06-14 11:28:01,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 631 transitions, 13806 flow [2024-06-14 11:28:02,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 631 transitions, 13449 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:02,825 INFO L231 Difference]: Finished difference. Result has 378 places, 606 transitions, 12606 flow [2024-06-14 11:28:02,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11555, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12606, PETRI_PLACES=378, PETRI_TRANSITIONS=606} [2024-06-14 11:28:02,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 11:28:02,825 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 606 transitions, 12606 flow [2024-06-14 11:28:02,826 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) [2024-06-14 11:28:02,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:02,826 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] [2024-06-14 11:28:02,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:28:02,826 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)] === [2024-06-14 11:28:02,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2141648537, now seen corresponding path program 10 times [2024-06-14 11:28:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17941631] [2024-06-14 11:28:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:02,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17941631] [2024-06-14 11:28:02,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17941631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:02,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:02,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:02,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56644807] [2024-06-14 11:28:02,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:02,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:02,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:02,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:02,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 606 transitions, 12606 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) [2024-06-14 11:28:02,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:02,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:02,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:03,803 INFO L124 PetriNetUnfolderBase]: 2562/4267 cut-off events. [2024-06-14 11:28:03,803 INFO L125 PetriNetUnfolderBase]: For 295095/295095 co-relation queries the response was YES. [2024-06-14 11:28:03,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38486 conditions, 4267 events. 2562/4267 cut-off events. For 295095/295095 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 26669 event pairs, 547 based on Foata normal form. 2/4248 useless extension candidates. Maximal degree in co-relation 38308. Up to 3022 conditions per place. [2024-06-14 11:28:03,865 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 388 changer transitions 0/636 dead transitions. [2024-06-14 11:28:03,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 636 transitions, 14610 flow [2024-06-14 11:28:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:28:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:28:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 11:28:03,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:28:03,866 INFO L175 Difference]: Start difference. First operand has 378 places, 606 transitions, 12606 flow. Second operand 9 states and 198 transitions. [2024-06-14 11:28:03,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 636 transitions, 14610 flow [2024-06-14 11:28:05,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 636 transitions, 13979 flow, removed 138 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:05,027 INFO L231 Difference]: Finished difference. Result has 382 places, 614 transitions, 12990 flow [2024-06-14 11:28:05,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12071, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12990, PETRI_PLACES=382, PETRI_TRANSITIONS=614} [2024-06-14 11:28:05,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-14 11:28:05,028 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 614 transitions, 12990 flow [2024-06-14 11:28:05,028 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) [2024-06-14 11:28:05,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:05,028 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] [2024-06-14 11:28:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:28:05,028 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)] === [2024-06-14 11:28:05,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash -324174455, now seen corresponding path program 11 times [2024-06-14 11:28:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:05,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847035325] [2024-06-14 11:28:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:05,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847035325] [2024-06-14 11:28:05,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847035325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:05,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:05,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:05,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904955915] [2024-06-14 11:28:05,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:05,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:05,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:05,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 614 transitions, 12990 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) [2024-06-14 11:28:05,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:05,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:05,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:05,994 INFO L124 PetriNetUnfolderBase]: 2556/4261 cut-off events. [2024-06-14 11:28:05,994 INFO L125 PetriNetUnfolderBase]: For 293994/293994 co-relation queries the response was YES. [2024-06-14 11:28:06,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38669 conditions, 4261 events. 2556/4261 cut-off events. For 293994/293994 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 26697 event pairs, 549 based on Foata normal form. 2/4242 useless extension candidates. Maximal degree in co-relation 38489. Up to 3018 conditions per place. [2024-06-14 11:28:06,055 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 393 changer transitions 0/637 dead transitions. [2024-06-14 11:28:06,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 637 transitions, 14640 flow [2024-06-14 11:28:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:28:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:28:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 11:28:06,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:28:06,056 INFO L175 Difference]: Start difference. First operand has 382 places, 614 transitions, 12990 flow. Second operand 11 states and 231 transitions. [2024-06-14 11:28:06,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 637 transitions, 14640 flow [2024-06-14 11:28:07,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 637 transitions, 13889 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 11:28:07,264 INFO L231 Difference]: Finished difference. Result has 387 places, 614 transitions, 13042 flow [2024-06-14 11:28:07,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12243, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13042, PETRI_PLACES=387, PETRI_TRANSITIONS=614} [2024-06-14 11:28:07,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-14 11:28:07,265 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 614 transitions, 13042 flow [2024-06-14 11:28:07,265 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) [2024-06-14 11:28:07,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:07,265 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] [2024-06-14 11:28:07,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:28:07,265 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)] === [2024-06-14 11:28:07,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1661253713, now seen corresponding path program 7 times [2024-06-14 11:28:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:07,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862887883] [2024-06-14 11:28:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:07,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:07,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862887883] [2024-06-14 11:28:07,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862887883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:07,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:07,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:07,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685200631] [2024-06-14 11:28:07,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:07,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:07,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:07,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:07,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:07,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 614 transitions, 13042 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) [2024-06-14 11:28:07,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:07,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:07,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:08,265 INFO L124 PetriNetUnfolderBase]: 2576/4323 cut-off events. [2024-06-14 11:28:08,265 INFO L125 PetriNetUnfolderBase]: For 299119/299122 co-relation queries the response was YES. [2024-06-14 11:28:08,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39011 conditions, 4323 events. 2576/4323 cut-off events. For 299119/299122 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27399 event pairs, 670 based on Foata normal form. 6/4316 useless extension candidates. Maximal degree in co-relation 38831. Up to 3554 conditions per place. [2024-06-14 11:28:08,327 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 405 selfloop transitions, 236 changer transitions 0/647 dead transitions. [2024-06-14 11:28:08,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 647 transitions, 15002 flow [2024-06-14 11:28:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:28:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:28:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-14 11:28:08,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-14 11:28:08,328 INFO L175 Difference]: Start difference. First operand has 387 places, 614 transitions, 13042 flow. Second operand 11 states and 228 transitions. [2024-06-14 11:28:08,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 647 transitions, 15002 flow [2024-06-14 11:28:09,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 647 transitions, 14300 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 11:28:09,579 INFO L231 Difference]: Finished difference. Result has 388 places, 626 transitions, 13152 flow [2024-06-14 11:28:09,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12352, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13152, PETRI_PLACES=388, PETRI_TRANSITIONS=626} [2024-06-14 11:28:09,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-14 11:28:09,579 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 626 transitions, 13152 flow [2024-06-14 11:28:09,579 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) [2024-06-14 11:28:09,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:09,580 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] [2024-06-14 11:28:09,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:28:09,580 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)] === [2024-06-14 11:28:09,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1349127107, now seen corresponding path program 8 times [2024-06-14 11:28:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:09,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959434004] [2024-06-14 11:28:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:09,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959434004] [2024-06-14 11:28:09,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959434004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:09,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:09,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699812387] [2024-06-14 11:28:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:09,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:09,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:09,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:09,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 626 transitions, 13152 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) [2024-06-14 11:28:09,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:09,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:09,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:10,585 INFO L124 PetriNetUnfolderBase]: 2564/4300 cut-off events. [2024-06-14 11:28:10,586 INFO L125 PetriNetUnfolderBase]: For 288294/288297 co-relation queries the response was YES. [2024-06-14 11:28:10,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 4300 events. 2564/4300 cut-off events. For 288294/288297 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27171 event pairs, 668 based on Foata normal form. 6/4293 useless extension candidates. Maximal degree in co-relation 38097. Up to 3542 conditions per place. [2024-06-14 11:28:10,647 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 236 changer transitions 0/646 dead transitions. [2024-06-14 11:28:10,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 646 transitions, 14656 flow [2024-06-14 11:28:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:28:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:28:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-14 11:28:10,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-14 11:28:10,648 INFO L175 Difference]: Start difference. First operand has 388 places, 626 transitions, 13152 flow. Second operand 11 states and 227 transitions. [2024-06-14 11:28:10,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 646 transitions, 14656 flow [2024-06-14 11:28:11,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 646 transitions, 14170 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 11:28:11,927 INFO L231 Difference]: Finished difference. Result has 393 places, 626 transitions, 13166 flow [2024-06-14 11:28:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12668, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13166, PETRI_PLACES=393, PETRI_TRANSITIONS=626} [2024-06-14 11:28:11,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 11:28:11,928 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 626 transitions, 13166 flow [2024-06-14 11:28:11,928 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) [2024-06-14 11:28:11,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:11,928 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] [2024-06-14 11:28:11,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:28:11,928 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)] === [2024-06-14 11:28:11,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:11,928 INFO L85 PathProgramCache]: Analyzing trace with hash -229510719, now seen corresponding path program 9 times [2024-06-14 11:28:11,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:11,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214353963] [2024-06-14 11:28:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:11,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:12,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:12,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214353963] [2024-06-14 11:28:12,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214353963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:12,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:12,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:28:12,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478374822] [2024-06-14 11:28:12,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:12,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:28:12,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:12,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:28:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:28:12,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:12,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 626 transitions, 13166 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) [2024-06-14 11:28:12,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:12,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:12,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:12,879 INFO L124 PetriNetUnfolderBase]: 2574/4320 cut-off events. [2024-06-14 11:28:12,879 INFO L125 PetriNetUnfolderBase]: For 282747/282747 co-relation queries the response was YES. [2024-06-14 11:28:12,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38443 conditions, 4320 events. 2574/4320 cut-off events. For 282747/282747 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27307 event pairs, 490 based on Foata normal form. 2/4317 useless extension candidates. Maximal degree in co-relation 38262. Up to 3614 conditions per place. [2024-06-14 11:28:12,939 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 146 changer transitions 0/646 dead transitions. [2024-06-14 11:28:12,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 646 transitions, 14809 flow [2024-06-14 11:28:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:28:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:28:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 11:28:12,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 11:28:12,940 INFO L175 Difference]: Start difference. First operand has 393 places, 626 transitions, 13166 flow. Second operand 7 states and 160 transitions. [2024-06-14 11:28:12,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 646 transitions, 14809 flow [2024-06-14 11:28:14,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 646 transitions, 14305 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 11:28:14,150 INFO L231 Difference]: Finished difference. Result has 389 places, 632 transitions, 13160 flow [2024-06-14 11:28:14,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12670, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13160, PETRI_PLACES=389, PETRI_TRANSITIONS=632} [2024-06-14 11:28:14,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 11:28:14,151 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 632 transitions, 13160 flow [2024-06-14 11:28:14,151 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) [2024-06-14 11:28:14,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:14,151 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] [2024-06-14 11:28:14,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:28:14,151 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)] === [2024-06-14 11:28:14,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash -236873715, now seen corresponding path program 12 times [2024-06-14 11:28:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:14,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886167272] [2024-06-14 11:28:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:14,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886167272] [2024-06-14 11:28:14,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886167272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:14,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:14,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735185666] [2024-06-14 11:28:14,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:14,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:14,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:14,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:14,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 632 transitions, 13160 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) [2024-06-14 11:28:14,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:14,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:14,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:15,164 INFO L124 PetriNetUnfolderBase]: 2664/4481 cut-off events. [2024-06-14 11:28:15,165 INFO L125 PetriNetUnfolderBase]: For 283996/283996 co-relation queries the response was YES. [2024-06-14 11:28:15,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39326 conditions, 4481 events. 2664/4481 cut-off events. For 283996/283996 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28570 event pairs, 496 based on Foata normal form. 1/4477 useless extension candidates. Maximal degree in co-relation 39145. Up to 3609 conditions per place. [2024-06-14 11:28:15,230 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 190 changer transitions 0/690 dead transitions. [2024-06-14 11:28:15,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 690 transitions, 15387 flow [2024-06-14 11:28:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 11:28:15,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 11:28:15,232 INFO L175 Difference]: Start difference. First operand has 389 places, 632 transitions, 13160 flow. Second operand 8 states and 185 transitions. [2024-06-14 11:28:15,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 690 transitions, 15387 flow [2024-06-14 11:28:16,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 690 transitions, 15145 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:16,442 INFO L231 Difference]: Finished difference. Result has 394 places, 662 transitions, 13927 flow [2024-06-14 11:28:16,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12922, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13927, PETRI_PLACES=394, PETRI_TRANSITIONS=662} [2024-06-14 11:28:16,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-14 11:28:16,443 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 662 transitions, 13927 flow [2024-06-14 11:28:16,443 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) [2024-06-14 11:28:16,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:16,443 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] [2024-06-14 11:28:16,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:28:16,444 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)] === [2024-06-14 11:28:16,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash 206422131, now seen corresponding path program 10 times [2024-06-14 11:28:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:16,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801219334] [2024-06-14 11:28:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:16,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:16,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:16,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801219334] [2024-06-14 11:28:16,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801219334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:16,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:16,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:28:16,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868897373] [2024-06-14 11:28:16,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:16,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:28:16,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:16,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:28:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:28:16,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:16,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 662 transitions, 13927 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) [2024-06-14 11:28:16,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:16,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:16,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:17,458 INFO L124 PetriNetUnfolderBase]: 2658/4469 cut-off events. [2024-06-14 11:28:17,458 INFO L125 PetriNetUnfolderBase]: For 282967/282967 co-relation queries the response was YES. [2024-06-14 11:28:17,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39632 conditions, 4469 events. 2658/4469 cut-off events. For 282967/282967 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 28496 event pairs, 495 based on Foata normal form. 2/4466 useless extension candidates. Maximal degree in co-relation 39449. Up to 3736 conditions per place. [2024-06-14 11:28:17,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 522 selfloop transitions, 152 changer transitions 0/680 dead transitions. [2024-06-14 11:28:17,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 680 transitions, 15359 flow [2024-06-14 11:28:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:28:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:28:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:28:17,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:28:17,523 INFO L175 Difference]: Start difference. First operand has 394 places, 662 transitions, 13927 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:28:17,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 680 transitions, 15359 flow [2024-06-14 11:28:18,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 680 transitions, 15190 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 11:28:18,934 INFO L231 Difference]: Finished difference. Result has 397 places, 662 transitions, 14084 flow [2024-06-14 11:28:18,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13758, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14084, PETRI_PLACES=397, PETRI_TRANSITIONS=662} [2024-06-14 11:28:18,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-14 11:28:18,935 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 662 transitions, 14084 flow [2024-06-14 11:28:18,935 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) [2024-06-14 11:28:18,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:18,935 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] [2024-06-14 11:28:18,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:28:18,935 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)] === [2024-06-14 11:28:18,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:18,935 INFO L85 PathProgramCache]: Analyzing trace with hash 206427525, now seen corresponding path program 13 times [2024-06-14 11:28:18,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:18,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560867665] [2024-06-14 11:28:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:18,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560867665] [2024-06-14 11:28:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560867665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:19,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:19,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:19,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627379630] [2024-06-14 11:28:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:19,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:19,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 662 transitions, 14084 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) [2024-06-14 11:28:19,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:19,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:19,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:19,966 INFO L124 PetriNetUnfolderBase]: 2663/4481 cut-off events. [2024-06-14 11:28:19,966 INFO L125 PetriNetUnfolderBase]: For 281691/281691 co-relation queries the response was YES. [2024-06-14 11:28:20,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40030 conditions, 4481 events. 2663/4481 cut-off events. For 281691/281691 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28599 event pairs, 493 based on Foata normal form. 1/4477 useless extension candidates. Maximal degree in co-relation 39846. Up to 3608 conditions per place. [2024-06-14 11:28:20,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 191 changer transitions 0/690 dead transitions. [2024-06-14 11:28:20,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 690 transitions, 15934 flow [2024-06-14 11:28:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:28:20,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 11:28:20,035 INFO L175 Difference]: Start difference. First operand has 397 places, 662 transitions, 14084 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:28:20,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 690 transitions, 15934 flow [2024-06-14 11:28:21,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 690 transitions, 15507 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:28:21,382 INFO L231 Difference]: Finished difference. Result has 397 places, 665 transitions, 14119 flow [2024-06-14 11:28:21,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13661, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14119, PETRI_PLACES=397, PETRI_TRANSITIONS=665} [2024-06-14 11:28:21,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-14 11:28:21,382 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 665 transitions, 14119 flow [2024-06-14 11:28:21,382 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) [2024-06-14 11:28:21,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:21,382 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] [2024-06-14 11:28:21,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:28:21,383 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)] === [2024-06-14 11:28:21,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:21,383 INFO L85 PathProgramCache]: Analyzing trace with hash -229510905, now seen corresponding path program 14 times [2024-06-14 11:28:21,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:21,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222682610] [2024-06-14 11:28:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:21,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:21,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:21,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222682610] [2024-06-14 11:28:21,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222682610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:21,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:21,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:21,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141372202] [2024-06-14 11:28:21,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:21,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:21,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:21,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:21,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:21,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 665 transitions, 14119 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) [2024-06-14 11:28:21,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:21,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:21,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:22,439 INFO L124 PetriNetUnfolderBase]: 2660/4472 cut-off events. [2024-06-14 11:28:22,439 INFO L125 PetriNetUnfolderBase]: For 278854/278854 co-relation queries the response was YES. [2024-06-14 11:28:22,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39977 conditions, 4472 events. 2660/4472 cut-off events. For 278854/278854 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28481 event pairs, 493 based on Foata normal form. 1/4468 useless extension candidates. Maximal degree in co-relation 39793. Up to 3606 conditions per place. [2024-06-14 11:28:22,503 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 176 changer transitions 0/683 dead transitions. [2024-06-14 11:28:22,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 683 transitions, 15696 flow [2024-06-14 11:28:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:28:22,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:28:22,504 INFO L175 Difference]: Start difference. First operand has 397 places, 665 transitions, 14119 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:28:22,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 683 transitions, 15696 flow [2024-06-14 11:28:23,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 683 transitions, 15425 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:23,973 INFO L231 Difference]: Finished difference. Result has 401 places, 667 transitions, 14324 flow [2024-06-14 11:28:23,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13850, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14324, PETRI_PLACES=401, PETRI_TRANSITIONS=667} [2024-06-14 11:28:23,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-14 11:28:23,973 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 667 transitions, 14324 flow [2024-06-14 11:28:23,973 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) [2024-06-14 11:28:23,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:23,973 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] [2024-06-14 11:28:23,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:28:23,973 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)] === [2024-06-14 11:28:23,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash 281398035, now seen corresponding path program 11 times [2024-06-14 11:28:23,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:23,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924055006] [2024-06-14 11:28:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:23,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:24,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:24,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924055006] [2024-06-14 11:28:24,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924055006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:24,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:24,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:28:24,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100746061] [2024-06-14 11:28:24,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:24,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:28:24,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:28:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:28:24,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:24,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 667 transitions, 14324 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) [2024-06-14 11:28:24,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:24,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:24,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:24,975 INFO L124 PetriNetUnfolderBase]: 2665/4502 cut-off events. [2024-06-14 11:28:24,975 INFO L125 PetriNetUnfolderBase]: For 287641/287653 co-relation queries the response was YES. [2024-06-14 11:28:25,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40320 conditions, 4502 events. 2665/4502 cut-off events. For 287641/287653 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 29010 event pairs, 686 based on Foata normal form. 9/4502 useless extension candidates. Maximal degree in co-relation 40135. Up to 3648 conditions per place. [2024-06-14 11:28:25,049 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 225 changer transitions 0/687 dead transitions. [2024-06-14 11:28:25,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 687 transitions, 15972 flow [2024-06-14 11:28:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:28:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:28:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:28:25,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 11:28:25,050 INFO L175 Difference]: Start difference. First operand has 401 places, 667 transitions, 14324 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:28:25,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 687 transitions, 15972 flow [2024-06-14 11:28:26,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 687 transitions, 15773 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:26,513 INFO L231 Difference]: Finished difference. Result has 403 places, 671 transitions, 14653 flow [2024-06-14 11:28:26,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14127, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14653, PETRI_PLACES=403, PETRI_TRANSITIONS=671} [2024-06-14 11:28:26,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 11:28:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 671 transitions, 14653 flow [2024-06-14 11:28:26,514 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) [2024-06-14 11:28:26,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:26,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:26,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:28:26,514 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)] === [2024-06-14 11:28:26,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:26,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1013382765, now seen corresponding path program 12 times [2024-06-14 11:28:26,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:26,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121529888] [2024-06-14 11:28:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:26,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:26,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:26,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121529888] [2024-06-14 11:28:26,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121529888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:26,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:26,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335111362] [2024-06-14 11:28:26,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:26,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:26,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:26,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 671 transitions, 14653 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) [2024-06-14 11:28:26,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:26,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:26,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:27,620 INFO L124 PetriNetUnfolderBase]: 2670/4491 cut-off events. [2024-06-14 11:28:27,620 INFO L125 PetriNetUnfolderBase]: For 289172/289175 co-relation queries the response was YES. [2024-06-14 11:28:27,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40525 conditions, 4491 events. 2670/4491 cut-off events. For 289172/289175 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 28803 event pairs, 690 based on Foata normal form. 3/4478 useless extension candidates. Maximal degree in co-relation 40340. Up to 3654 conditions per place. [2024-06-14 11:28:27,676 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 237 changer transitions 0/692 dead transitions. [2024-06-14 11:28:27,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 692 transitions, 16446 flow [2024-06-14 11:28:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 11:28:27,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:28:27,677 INFO L175 Difference]: Start difference. First operand has 403 places, 671 transitions, 14653 flow. Second operand 8 states and 176 transitions. [2024-06-14 11:28:27,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 692 transitions, 16446 flow [2024-06-14 11:28:29,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 692 transitions, 16190 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 11:28:29,161 INFO L231 Difference]: Finished difference. Result has 409 places, 674 transitions, 14938 flow [2024-06-14 11:28:29,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14402, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14938, PETRI_PLACES=409, PETRI_TRANSITIONS=674} [2024-06-14 11:28:29,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-14 11:28:29,162 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 674 transitions, 14938 flow [2024-06-14 11:28:29,162 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) [2024-06-14 11:28:29,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:29,162 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] [2024-06-14 11:28:29,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:28:29,162 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)] === [2024-06-14 11:28:29,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash -434180611, now seen corresponding path program 13 times [2024-06-14 11:28:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:29,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895320376] [2024-06-14 11:28:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:29,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895320376] [2024-06-14 11:28:29,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895320376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:29,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:29,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:29,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071779802] [2024-06-14 11:28:29,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:29,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:29,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:29,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 674 transitions, 14938 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) [2024-06-14 11:28:29,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:29,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:29,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:30,194 INFO L124 PetriNetUnfolderBase]: 2675/4495 cut-off events. [2024-06-14 11:28:30,194 INFO L125 PetriNetUnfolderBase]: For 299110/299113 co-relation queries the response was YES. [2024-06-14 11:28:30,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40757 conditions, 4495 events. 2675/4495 cut-off events. For 299110/299113 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28786 event pairs, 688 based on Foata normal form. 3/4485 useless extension candidates. Maximal degree in co-relation 40570. Up to 3660 conditions per place. [2024-06-14 11:28:30,260 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 246 changer transitions 0/697 dead transitions. [2024-06-14 11:28:30,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 697 transitions, 16750 flow [2024-06-14 11:28:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:28:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:28:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 11:28:30,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:28:30,261 INFO L175 Difference]: Start difference. First operand has 409 places, 674 transitions, 14938 flow. Second operand 10 states and 210 transitions. [2024-06-14 11:28:30,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 697 transitions, 16750 flow [2024-06-14 11:28:31,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 697 transitions, 16095 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 11:28:31,486 INFO L231 Difference]: Finished difference. Result has 412 places, 677 transitions, 14843 flow [2024-06-14 11:28:31,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14305, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14843, PETRI_PLACES=412, PETRI_TRANSITIONS=677} [2024-06-14 11:28:31,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 11:28:31,487 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 677 transitions, 14843 flow [2024-06-14 11:28:31,487 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) [2024-06-14 11:28:31,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:31,487 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] [2024-06-14 11:28:31,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:28:31,487 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)] === [2024-06-14 11:28:31,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:31,487 INFO L85 PathProgramCache]: Analyzing trace with hash 117327415, now seen corresponding path program 15 times [2024-06-14 11:28:31,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:31,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342501837] [2024-06-14 11:28:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:31,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:31,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:31,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342501837] [2024-06-14 11:28:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342501837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:31,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756775525] [2024-06-14 11:28:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:31,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:31,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:31,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 677 transitions, 14843 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) [2024-06-14 11:28:31,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:31,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:31,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:32,631 INFO L124 PetriNetUnfolderBase]: 2680/4471 cut-off events. [2024-06-14 11:28:32,631 INFO L125 PetriNetUnfolderBase]: For 303718/303718 co-relation queries the response was YES. [2024-06-14 11:28:32,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40791 conditions, 4471 events. 2680/4471 cut-off events. For 303718/303718 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 28337 event pairs, 600 based on Foata normal form. 1/4442 useless extension candidates. Maximal degree in co-relation 40604. Up to 3050 conditions per place. [2024-06-14 11:28:32,690 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 410 changer transitions 0/706 dead transitions. [2024-06-14 11:28:32,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 706 transitions, 16857 flow [2024-06-14 11:28:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:28:32,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:28:32,691 INFO L175 Difference]: Start difference. First operand has 412 places, 677 transitions, 14843 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:28:32,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 706 transitions, 16857 flow [2024-06-14 11:28:33,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 706 transitions, 16231 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 11:28:34,006 INFO L231 Difference]: Finished difference. Result has 412 places, 686 transitions, 15568 flow [2024-06-14 11:28:34,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14223, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15568, PETRI_PLACES=412, PETRI_TRANSITIONS=686} [2024-06-14 11:28:34,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 11:28:34,007 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 686 transitions, 15568 flow [2024-06-14 11:28:34,007 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) [2024-06-14 11:28:34,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:34,007 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] [2024-06-14 11:28:34,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:28:34,007 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)] === [2024-06-14 11:28:34,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:34,007 INFO L85 PathProgramCache]: Analyzing trace with hash -63764427, now seen corresponding path program 14 times [2024-06-14 11:28:34,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:34,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655537645] [2024-06-14 11:28:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:34,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:34,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655537645] [2024-06-14 11:28:34,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655537645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:34,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:34,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49987345] [2024-06-14 11:28:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:34,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:34,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:34,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:34,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 686 transitions, 15568 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) [2024-06-14 11:28:34,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:34,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:35,100 INFO L124 PetriNetUnfolderBase]: 2677/4507 cut-off events. [2024-06-14 11:28:35,100 INFO L125 PetriNetUnfolderBase]: For 308697/308700 co-relation queries the response was YES. [2024-06-14 11:28:35,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41563 conditions, 4507 events. 2677/4507 cut-off events. For 308697/308700 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28952 event pairs, 690 based on Foata normal form. 3/4494 useless extension candidates. Maximal degree in co-relation 41375. Up to 3664 conditions per place. [2024-06-14 11:28:35,169 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 248 changer transitions 0/706 dead transitions. [2024-06-14 11:28:35,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 706 transitions, 17198 flow [2024-06-14 11:28:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:28:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:28:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 11:28:35,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-14 11:28:35,169 INFO L175 Difference]: Start difference. First operand has 412 places, 686 transitions, 15568 flow. Second operand 11 states and 225 transitions. [2024-06-14 11:28:35,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 706 transitions, 17198 flow [2024-06-14 11:28:36,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 706 transitions, 16798 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 11:28:36,666 INFO L231 Difference]: Finished difference. Result has 419 places, 686 transitions, 15670 flow [2024-06-14 11:28:36,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15168, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15670, PETRI_PLACES=419, PETRI_TRANSITIONS=686} [2024-06-14 11:28:36,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-14 11:28:36,666 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 686 transitions, 15670 flow [2024-06-14 11:28:36,666 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) [2024-06-14 11:28:36,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:36,666 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] [2024-06-14 11:28:36,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:28:36,666 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)] === [2024-06-14 11:28:36,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash -994624097, now seen corresponding path program 15 times [2024-06-14 11:28:36,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:36,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893299110] [2024-06-14 11:28:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:36,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:36,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893299110] [2024-06-14 11:28:36,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893299110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:36,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:36,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:28:36,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071405336] [2024-06-14 11:28:36,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:36,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:28:36,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:36,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:28:36,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:28:36,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:36,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 686 transitions, 15670 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) [2024-06-14 11:28:36,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:36,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:36,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:37,782 INFO L124 PetriNetUnfolderBase]: 2698/4540 cut-off events. [2024-06-14 11:28:37,782 INFO L125 PetriNetUnfolderBase]: For 310942/310942 co-relation queries the response was YES. [2024-06-14 11:28:37,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41197 conditions, 4540 events. 2698/4540 cut-off events. For 310942/310942 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 29088 event pairs, 483 based on Foata normal form. 1/4536 useless extension candidates. Maximal degree in co-relation 41008. Up to 3704 conditions per place. [2024-06-14 11:28:37,844 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 192 changer transitions 0/711 dead transitions. [2024-06-14 11:28:37,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 711 transitions, 17618 flow [2024-06-14 11:28:37,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 11:28:37,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 11:28:37,845 INFO L175 Difference]: Start difference. First operand has 419 places, 686 transitions, 15670 flow. Second operand 8 states and 178 transitions. [2024-06-14 11:28:37,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 711 transitions, 17618 flow [2024-06-14 11:28:39,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 711 transitions, 17091 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 11:28:39,437 INFO L231 Difference]: Finished difference. Result has 418 places, 695 transitions, 15725 flow [2024-06-14 11:28:39,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15161, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15725, PETRI_PLACES=418, PETRI_TRANSITIONS=695} [2024-06-14 11:28:39,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-14 11:28:39,438 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 695 transitions, 15725 flow [2024-06-14 11:28:39,438 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) [2024-06-14 11:28:39,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:39,438 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] [2024-06-14 11:28:39,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:28:39,438 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)] === [2024-06-14 11:28:39,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:39,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1775106921, now seen corresponding path program 16 times [2024-06-14 11:28:39,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:39,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224568757] [2024-06-14 11:28:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:39,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:39,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:39,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224568757] [2024-06-14 11:28:39,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224568757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:39,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:39,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482049319] [2024-06-14 11:28:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:39,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:39,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:39,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:39,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 695 transitions, 15725 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) [2024-06-14 11:28:39,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:39,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:39,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:40,565 INFO L124 PetriNetUnfolderBase]: 2727/4594 cut-off events. [2024-06-14 11:28:40,565 INFO L125 PetriNetUnfolderBase]: For 325335/325335 co-relation queries the response was YES. [2024-06-14 11:28:40,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41867 conditions, 4594 events. 2727/4594 cut-off events. For 325335/325335 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29519 event pairs, 484 based on Foata normal form. 1/4590 useless extension candidates. Maximal degree in co-relation 41677. Up to 3507 conditions per place. [2024-06-14 11:28:40,635 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 240 changer transitions 0/724 dead transitions. [2024-06-14 11:28:40,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 724 transitions, 17816 flow [2024-06-14 11:28:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:28:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:28:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:28:40,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:28:40,636 INFO L175 Difference]: Start difference. First operand has 418 places, 695 transitions, 15725 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:28:40,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 724 transitions, 17816 flow [2024-06-14 11:28:42,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 724 transitions, 17539 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:42,069 INFO L231 Difference]: Finished difference. Result has 423 places, 707 transitions, 16354 flow [2024-06-14 11:28:42,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15450, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16354, PETRI_PLACES=423, PETRI_TRANSITIONS=707} [2024-06-14 11:28:42,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 11:28:42,069 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 707 transitions, 16354 flow [2024-06-14 11:28:42,069 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) [2024-06-14 11:28:42,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:42,069 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] [2024-06-14 11:28:42,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:28:42,069 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)] === [2024-06-14 11:28:42,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1597975401, now seen corresponding path program 17 times [2024-06-14 11:28:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:42,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224225988] [2024-06-14 11:28:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:42,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:42,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:42,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224225988] [2024-06-14 11:28:42,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224225988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:42,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:42,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:42,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743807888] [2024-06-14 11:28:42,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:42,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:42,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:42,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:42,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:42,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:42,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 707 transitions, 16354 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) [2024-06-14 11:28:42,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:42,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:42,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:43,195 INFO L124 PetriNetUnfolderBase]: 2724/4589 cut-off events. [2024-06-14 11:28:43,196 INFO L125 PetriNetUnfolderBase]: For 333062/333062 co-relation queries the response was YES. [2024-06-14 11:28:43,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42229 conditions, 4589 events. 2724/4589 cut-off events. For 333062/333062 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29486 event pairs, 484 based on Foata normal form. 1/4585 useless extension candidates. Maximal degree in co-relation 42037. Up to 3505 conditions per place. [2024-06-14 11:28:43,261 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 484 selfloop transitions, 235 changer transitions 0/725 dead transitions. [2024-06-14 11:28:43,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 725 transitions, 18150 flow [2024-06-14 11:28:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:28:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:28:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 11:28:43,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 11:28:43,262 INFO L175 Difference]: Start difference. First operand has 423 places, 707 transitions, 16354 flow. Second operand 10 states and 214 transitions. [2024-06-14 11:28:43,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 725 transitions, 18150 flow [2024-06-14 11:28:44,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 725 transitions, 17673 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-14 11:28:44,651 INFO L231 Difference]: Finished difference. Result has 428 places, 707 transitions, 16353 flow [2024-06-14 11:28:44,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15877, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16353, PETRI_PLACES=428, PETRI_TRANSITIONS=707} [2024-06-14 11:28:44,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-14 11:28:44,652 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 707 transitions, 16353 flow [2024-06-14 11:28:44,652 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) [2024-06-14 11:28:44,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:44,652 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] [2024-06-14 11:28:44,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:28:44,652 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)] === [2024-06-14 11:28:44,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:44,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1161717909, now seen corresponding path program 16 times [2024-06-14 11:28:44,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:44,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250553011] [2024-06-14 11:28:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:44,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250553011] [2024-06-14 11:28:44,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250553011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:44,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:44,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:28:44,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846478943] [2024-06-14 11:28:44,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:44,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:28:44,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:28:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:28:44,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:44,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 707 transitions, 16353 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) [2024-06-14 11:28:44,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:44,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:45,782 INFO L124 PetriNetUnfolderBase]: 2718/4581 cut-off events. [2024-06-14 11:28:45,783 INFO L125 PetriNetUnfolderBase]: For 336761/336761 co-relation queries the response was YES. [2024-06-14 11:28:45,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42026 conditions, 4581 events. 2718/4581 cut-off events. For 336761/336761 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29426 event pairs, 484 based on Foata normal form. 2/4578 useless extension candidates. Maximal degree in co-relation 41833. Up to 3734 conditions per place. [2024-06-14 11:28:45,860 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 185 changer transitions 0/724 dead transitions. [2024-06-14 11:28:45,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 724 transitions, 18149 flow [2024-06-14 11:28:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:28:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:28:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 11:28:45,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 11:28:45,861 INFO L175 Difference]: Start difference. First operand has 428 places, 707 transitions, 16353 flow. Second operand 9 states and 197 transitions. [2024-06-14 11:28:45,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 724 transitions, 18149 flow [2024-06-14 11:28:47,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 724 transitions, 17726 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 11:28:47,033 INFO L231 Difference]: Finished difference. Result has 430 places, 707 transitions, 16312 flow [2024-06-14 11:28:47,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15930, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16312, PETRI_PLACES=430, PETRI_TRANSITIONS=707} [2024-06-14 11:28:47,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-14 11:28:47,034 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 707 transitions, 16312 flow [2024-06-14 11:28:47,034 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) [2024-06-14 11:28:47,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:47,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:47,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:28:47,034 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)] === [2024-06-14 11:28:47,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1654911403, now seen corresponding path program 18 times [2024-06-14 11:28:47,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:47,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146185235] [2024-06-14 11:28:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:47,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:47,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146185235] [2024-06-14 11:28:47,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146185235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:47,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:47,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:47,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76829672] [2024-06-14 11:28:47,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:47,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:47,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:47,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:47,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 707 transitions, 16312 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) [2024-06-14 11:28:47,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:47,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:47,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:48,168 INFO L124 PetriNetUnfolderBase]: 2723/4588 cut-off events. [2024-06-14 11:28:48,168 INFO L125 PetriNetUnfolderBase]: For 341167/341167 co-relation queries the response was YES. [2024-06-14 11:28:48,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42050 conditions, 4588 events. 2723/4588 cut-off events. For 341167/341167 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 29503 event pairs, 480 based on Foata normal form. 1/4584 useless extension candidates. Maximal degree in co-relation 41856. Up to 3729 conditions per place. [2024-06-14 11:28:48,241 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 578 selfloop transitions, 151 changer transitions 0/735 dead transitions. [2024-06-14 11:28:48,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 735 transitions, 18132 flow [2024-06-14 11:28:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 11:28:48,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 11:28:48,242 INFO L175 Difference]: Start difference. First operand has 430 places, 707 transitions, 16312 flow. Second operand 8 states and 181 transitions. [2024-06-14 11:28:48,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 735 transitions, 18132 flow [2024-06-14 11:28:49,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 735 transitions, 17782 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:28:49,808 INFO L231 Difference]: Finished difference. Result has 432 places, 710 transitions, 16345 flow [2024-06-14 11:28:49,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15962, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16345, PETRI_PLACES=432, PETRI_TRANSITIONS=710} [2024-06-14 11:28:49,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-14 11:28:49,808 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 710 transitions, 16345 flow [2024-06-14 11:28:49,808 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) [2024-06-14 11:28:49,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:49,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:49,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:28:49,809 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)] === [2024-06-14 11:28:49,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:49,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1642024393, now seen corresponding path program 19 times [2024-06-14 11:28:49,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:49,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537114438] [2024-06-14 11:28:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:49,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:49,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:49,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537114438] [2024-06-14 11:28:49,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537114438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:49,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:49,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986644585] [2024-06-14 11:28:49,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:49,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:49,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:49,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 710 transitions, 16345 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) [2024-06-14 11:28:49,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:49,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:49,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:50,872 INFO L124 PetriNetUnfolderBase]: 2720/4584 cut-off events. [2024-06-14 11:28:50,872 INFO L125 PetriNetUnfolderBase]: For 344311/344311 co-relation queries the response was YES. [2024-06-14 11:28:50,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42034 conditions, 4584 events. 2720/4584 cut-off events. For 344311/344311 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29458 event pairs, 484 based on Foata normal form. 1/4580 useless extension candidates. Maximal degree in co-relation 41839. Up to 3502 conditions per place. [2024-06-14 11:28:50,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 259 changer transitions 0/733 dead transitions. [2024-06-14 11:28:50,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 733 transitions, 18231 flow [2024-06-14 11:28:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:28:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:28:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 11:28:50,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 11:28:50,943 INFO L175 Difference]: Start difference. First operand has 432 places, 710 transitions, 16345 flow. Second operand 8 states and 181 transitions. [2024-06-14 11:28:50,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 733 transitions, 18231 flow [2024-06-14 11:28:52,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 733 transitions, 17630 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 11:28:52,779 INFO L231 Difference]: Finished difference. Result has 433 places, 710 transitions, 16268 flow [2024-06-14 11:28:52,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15744, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16268, PETRI_PLACES=433, PETRI_TRANSITIONS=710} [2024-06-14 11:28:52,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 11:28:52,779 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 710 transitions, 16268 flow [2024-06-14 11:28:52,780 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) [2024-06-14 11:28:52,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:52,780 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] [2024-06-14 11:28:52,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:28:52,780 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)] === [2024-06-14 11:28:52,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash -999986477, now seen corresponding path program 17 times [2024-06-14 11:28:52,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:52,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014585088] [2024-06-14 11:28:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:52,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:52,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:52,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014585088] [2024-06-14 11:28:52,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014585088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:52,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:52,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:28:52,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028512725] [2024-06-14 11:28:52,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:52,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:28:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:52,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:28:52,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:28:52,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:52,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 710 transitions, 16268 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) [2024-06-14 11:28:52,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:52,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:52,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:53,820 INFO L124 PetriNetUnfolderBase]: 2717/4579 cut-off events. [2024-06-14 11:28:53,821 INFO L125 PetriNetUnfolderBase]: For 348940/348940 co-relation queries the response was YES. [2024-06-14 11:28:53,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41698 conditions, 4579 events. 2717/4579 cut-off events. For 348940/348940 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 29508 event pairs, 488 based on Foata normal form. 1/4575 useless extension candidates. Maximal degree in co-relation 41504. Up to 3734 conditions per place. [2024-06-14 11:28:53,889 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 530 selfloop transitions, 195 changer transitions 0/731 dead transitions. [2024-06-14 11:28:53,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 731 transitions, 18141 flow [2024-06-14 11:28:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:28:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:28:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:28:53,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:28:53,890 INFO L175 Difference]: Start difference. First operand has 433 places, 710 transitions, 16268 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:28:53,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 731 transitions, 18141 flow [2024-06-14 11:28:55,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 731 transitions, 17307 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 11:28:55,838 INFO L231 Difference]: Finished difference. Result has 433 places, 710 transitions, 15830 flow [2024-06-14 11:28:55,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15434, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15830, PETRI_PLACES=433, PETRI_TRANSITIONS=710} [2024-06-14 11:28:55,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 11:28:55,838 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 710 transitions, 15830 flow [2024-06-14 11:28:55,838 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) [2024-06-14 11:28:55,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:55,839 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] [2024-06-14 11:28:55,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:28:55,839 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)] === [2024-06-14 11:28:55,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1647565147, now seen corresponding path program 18 times [2024-06-14 11:28:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:55,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796261198] [2024-06-14 11:28:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:55,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:55,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796261198] [2024-06-14 11:28:55,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796261198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:55,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:55,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:28:55,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106345867] [2024-06-14 11:28:55,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:55,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:28:55,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:55,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:28:55,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:28:55,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:55,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 710 transitions, 15830 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) [2024-06-14 11:28:55,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:55,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:55,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:56,983 INFO L124 PetriNetUnfolderBase]: 2745/4623 cut-off events. [2024-06-14 11:28:56,983 INFO L125 PetriNetUnfolderBase]: For 358204/358204 co-relation queries the response was YES. [2024-06-14 11:28:57,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41643 conditions, 4623 events. 2745/4623 cut-off events. For 358204/358204 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 29691 event pairs, 481 based on Foata normal form. 1/4619 useless extension candidates. Maximal degree in co-relation 41449. Up to 3898 conditions per place. [2024-06-14 11:28:57,060 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 112 changer transitions 0/743 dead transitions. [2024-06-14 11:28:57,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 743 transitions, 17829 flow [2024-06-14 11:28:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:28:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:28:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:28:57,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:28:57,061 INFO L175 Difference]: Start difference. First operand has 433 places, 710 transitions, 15830 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:28:57,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 743 transitions, 17829 flow [2024-06-14 11:28:58,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 743 transitions, 16971 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-14 11:28:58,908 INFO L231 Difference]: Finished difference. Result has 430 places, 721 transitions, 15613 flow [2024-06-14 11:28:58,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15008, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15613, PETRI_PLACES=430, PETRI_TRANSITIONS=721} [2024-06-14 11:28:58,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-14 11:28:58,908 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 721 transitions, 15613 flow [2024-06-14 11:28:58,908 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) [2024-06-14 11:28:58,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:58,908 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] [2024-06-14 11:28:58,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:28:58,909 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)] === [2024-06-14 11:28:58,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1654922563, now seen corresponding path program 20 times [2024-06-14 11:28:58,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:58,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245952167] [2024-06-14 11:28:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:58,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:59,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245952167] [2024-06-14 11:28:59,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245952167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:59,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:59,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:28:59,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937430693] [2024-06-14 11:28:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:28:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:28:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:28:59,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:59,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 721 transitions, 15613 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) [2024-06-14 11:28:59,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:59,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:59,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:00,048 INFO L124 PetriNetUnfolderBase]: 2742/4619 cut-off events. [2024-06-14 11:29:00,048 INFO L125 PetriNetUnfolderBase]: For 355967/355967 co-relation queries the response was YES. [2024-06-14 11:29:00,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40927 conditions, 4619 events. 2742/4619 cut-off events. For 355967/355967 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 29694 event pairs, 480 based on Foata normal form. 1/4615 useless extension candidates. Maximal degree in co-relation 40733. Up to 3741 conditions per place. [2024-06-14 11:29:00,122 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 584 selfloop transitions, 159 changer transitions 0/749 dead transitions. [2024-06-14 11:29:00,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 749 transitions, 17238 flow [2024-06-14 11:29:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:29:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:29:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 11:29:00,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 11:29:00,123 INFO L175 Difference]: Start difference. First operand has 430 places, 721 transitions, 15613 flow. Second operand 10 states and 216 transitions. [2024-06-14 11:29:00,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 749 transitions, 17238 flow [2024-06-14 11:29:02,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 749 transitions, 16946 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 11:29:02,179 INFO L231 Difference]: Finished difference. Result has 436 places, 721 transitions, 15645 flow [2024-06-14 11:29:02,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15321, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15645, PETRI_PLACES=436, PETRI_TRANSITIONS=721} [2024-06-14 11:29:02,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 11:29:02,180 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 721 transitions, 15645 flow [2024-06-14 11:29:02,180 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) [2024-06-14 11:29:02,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:02,180 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] [2024-06-14 11:29:02,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:29:02,180 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)] === [2024-06-14 11:29:02,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:02,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1654911217, now seen corresponding path program 19 times [2024-06-14 11:29:02,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:02,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260539428] [2024-06-14 11:29:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:02,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:02,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:02,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260539428] [2024-06-14 11:29:02,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260539428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:02,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:02,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056957048] [2024-06-14 11:29:02,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:02,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:02,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:02,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:02,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:02,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:02,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 721 transitions, 15645 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) [2024-06-14 11:29:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:02,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:03,766 INFO L124 PetriNetUnfolderBase]: 2769/4667 cut-off events. [2024-06-14 11:29:03,766 INFO L125 PetriNetUnfolderBase]: For 359949/359949 co-relation queries the response was YES. [2024-06-14 11:29:03,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41521 conditions, 4667 events. 2769/4667 cut-off events. For 359949/359949 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30098 event pairs, 483 based on Foata normal form. 1/4663 useless extension candidates. Maximal degree in co-relation 41326. Up to 3837 conditions per place. [2024-06-14 11:29:03,876 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 175 changer transitions 0/752 dead transitions. [2024-06-14 11:29:03,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 752 transitions, 17849 flow [2024-06-14 11:29:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:29:03,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:29:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:29:03,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 11:29:03,877 INFO L175 Difference]: Start difference. First operand has 436 places, 721 transitions, 15645 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:29:03,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 752 transitions, 17849 flow [2024-06-14 11:29:06,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 752 transitions, 17471 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 11:29:06,069 INFO L231 Difference]: Finished difference. Result has 434 places, 737 transitions, 16218 flow [2024-06-14 11:29:06,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15267, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16218, PETRI_PLACES=434, PETRI_TRANSITIONS=737} [2024-06-14 11:29:06,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-14 11:29:06,069 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 737 transitions, 16218 flow [2024-06-14 11:29:06,069 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) [2024-06-14 11:29:06,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:06,070 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] [2024-06-14 11:29:06,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:29:06,070 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)] === [2024-06-14 11:29:06,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash -856686325, now seen corresponding path program 20 times [2024-06-14 11:29:06,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:06,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368284241] [2024-06-14 11:29:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:06,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:06,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368284241] [2024-06-14 11:29:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368284241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:06,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:06,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706866277] [2024-06-14 11:29:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:06,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:06,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 737 transitions, 16218 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) [2024-06-14 11:29:06,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:06,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:06,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:07,461 INFO L124 PetriNetUnfolderBase]: 2766/4661 cut-off events. [2024-06-14 11:29:07,461 INFO L125 PetriNetUnfolderBase]: For 364032/364032 co-relation queries the response was YES. [2024-06-14 11:29:07,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41584 conditions, 4661 events. 2766/4661 cut-off events. For 364032/364032 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30052 event pairs, 481 based on Foata normal form. 1/4657 useless extension candidates. Maximal degree in co-relation 41387. Up to 3834 conditions per place. [2024-06-14 11:29:07,537 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 564 selfloop transitions, 189 changer transitions 0/759 dead transitions. [2024-06-14 11:29:07,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 759 transitions, 17871 flow [2024-06-14 11:29:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 11:29:07,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 11:29:07,537 INFO L175 Difference]: Start difference. First operand has 434 places, 737 transitions, 16218 flow. Second operand 8 states and 181 transitions. [2024-06-14 11:29:07,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 759 transitions, 17871 flow [2024-06-14 11:29:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 759 transitions, 17486 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:29:09,130 INFO L231 Difference]: Finished difference. Result has 437 places, 737 transitions, 16243 flow [2024-06-14 11:29:09,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15835, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16243, PETRI_PLACES=437, PETRI_TRANSITIONS=737} [2024-06-14 11:29:09,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-14 11:29:09,131 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 737 transitions, 16243 flow [2024-06-14 11:29:09,131 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) [2024-06-14 11:29:09,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:09,131 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] [2024-06-14 11:29:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:29:09,131 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)] === [2024-06-14 11:29:09,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash 192693333, now seen corresponding path program 1 times [2024-06-14 11:29:09,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:09,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069831324] [2024-06-14 11:29:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:09,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:09,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:09,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069831324] [2024-06-14 11:29:09,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069831324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:09,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:09,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:09,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148705873] [2024-06-14 11:29:09,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:09,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:09,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:09,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:09,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:09,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:09,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 737 transitions, 16243 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) [2024-06-14 11:29:09,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:09,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:09,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:10,360 INFO L124 PetriNetUnfolderBase]: 2852/4806 cut-off events. [2024-06-14 11:29:10,360 INFO L125 PetriNetUnfolderBase]: For 440319/440328 co-relation queries the response was YES. [2024-06-14 11:29:10,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43472 conditions, 4806 events. 2852/4806 cut-off events. For 440319/440328 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31222 event pairs, 894 based on Foata normal form. 12/4816 useless extension candidates. Maximal degree in co-relation 43274. Up to 4043 conditions per place. [2024-06-14 11:29:10,427 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 715 selfloop transitions, 52 changer transitions 0/773 dead transitions. [2024-06-14 11:29:10,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 773 transitions, 18201 flow [2024-06-14 11:29:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:29:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:29:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 11:29:10,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 11:29:10,428 INFO L175 Difference]: Start difference. First operand has 437 places, 737 transitions, 16243 flow. Second operand 7 states and 159 transitions. [2024-06-14 11:29:10,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 773 transitions, 18201 flow [2024-06-14 11:29:12,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 773 transitions, 17822 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:29:12,128 INFO L231 Difference]: Finished difference. Result has 440 places, 744 transitions, 16109 flow [2024-06-14 11:29:12,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15868, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16109, PETRI_PLACES=440, PETRI_TRANSITIONS=744} [2024-06-14 11:29:12,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-14 11:29:12,129 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 744 transitions, 16109 flow [2024-06-14 11:29:12,129 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) [2024-06-14 11:29:12,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:12,129 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] [2024-06-14 11:29:12,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:29:12,129 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)] === [2024-06-14 11:29:12,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash -208735595, now seen corresponding path program 2 times [2024-06-14 11:29:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:12,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637497897] [2024-06-14 11:29:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:12,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:12,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:12,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637497897] [2024-06-14 11:29:12,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637497897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:12,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771874421] [2024-06-14 11:29:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:12,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:12,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 744 transitions, 16109 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) [2024-06-14 11:29:12,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:12,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:12,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:13,308 INFO L124 PetriNetUnfolderBase]: 2918/4913 cut-off events. [2024-06-14 11:29:13,309 INFO L125 PetriNetUnfolderBase]: For 460360/460369 co-relation queries the response was YES. [2024-06-14 11:29:13,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44579 conditions, 4913 events. 2918/4913 cut-off events. For 460360/460369 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31954 event pairs, 916 based on Foata normal form. 12/4923 useless extension candidates. Maximal degree in co-relation 44379. Up to 4268 conditions per place. [2024-06-14 11:29:13,389 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 715 selfloop transitions, 48 changer transitions 0/769 dead transitions. [2024-06-14 11:29:13,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 769 transitions, 17968 flow [2024-06-14 11:29:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:29:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:29:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 11:29:13,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 11:29:13,389 INFO L175 Difference]: Start difference. First operand has 440 places, 744 transitions, 16109 flow. Second operand 7 states and 156 transitions. [2024-06-14 11:29:13,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 769 transitions, 17968 flow [2024-06-14 11:29:15,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 769 transitions, 17882 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:29:15,364 INFO L231 Difference]: Finished difference. Result has 446 places, 747 transitions, 16180 flow [2024-06-14 11:29:15,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16027, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16180, PETRI_PLACES=446, PETRI_TRANSITIONS=747} [2024-06-14 11:29:15,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-14 11:29:15,365 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 747 transitions, 16180 flow [2024-06-14 11:29:15,365 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) [2024-06-14 11:29:15,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:15,365 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] [2024-06-14 11:29:15,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:29:15,365 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)] === [2024-06-14 11:29:15,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:15,365 INFO L85 PathProgramCache]: Analyzing trace with hash -208587725, now seen corresponding path program 3 times [2024-06-14 11:29:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:15,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861962060] [2024-06-14 11:29:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:15,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:15,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861962060] [2024-06-14 11:29:15,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861962060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:15,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:15,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141060288] [2024-06-14 11:29:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:15,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:15,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:15,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 747 transitions, 16180 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) [2024-06-14 11:29:15,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:15,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:15,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:16,516 INFO L124 PetriNetUnfolderBase]: 2900/4887 cut-off events. [2024-06-14 11:29:16,517 INFO L125 PetriNetUnfolderBase]: For 446970/446979 co-relation queries the response was YES. [2024-06-14 11:29:16,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43860 conditions, 4887 events. 2900/4887 cut-off events. For 446970/446979 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31877 event pairs, 914 based on Foata normal form. 14/4899 useless extension candidates. Maximal degree in co-relation 43657. Up to 4290 conditions per place. [2024-06-14 11:29:16,592 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 713 selfloop transitions, 47 changer transitions 0/766 dead transitions. [2024-06-14 11:29:16,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 766 transitions, 17815 flow [2024-06-14 11:29:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:29:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:29:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:29:16,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:29:16,593 INFO L175 Difference]: Start difference. First operand has 446 places, 747 transitions, 16180 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:29:16,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 766 transitions, 17815 flow [2024-06-14 11:29:18,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 766 transitions, 17727 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 11:29:18,462 INFO L231 Difference]: Finished difference. Result has 450 places, 748 transitions, 16215 flow [2024-06-14 11:29:18,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16104, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16215, PETRI_PLACES=450, PETRI_TRANSITIONS=748} [2024-06-14 11:29:18,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 11:29:18,463 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 748 transitions, 16215 flow [2024-06-14 11:29:18,463 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) [2024-06-14 11:29:18,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:18,463 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] [2024-06-14 11:29:18,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:29:18,464 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)] === [2024-06-14 11:29:18,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1008011457, now seen corresponding path program 4 times [2024-06-14 11:29:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:18,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680051039] [2024-06-14 11:29:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:18,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:18,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:18,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680051039] [2024-06-14 11:29:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680051039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:18,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:18,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:29:18,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347484049] [2024-06-14 11:29:18,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:18,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:29:18,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:18,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:29:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:29:18,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:18,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 748 transitions, 16215 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) [2024-06-14 11:29:18,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:18,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:18,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:19,685 INFO L124 PetriNetUnfolderBase]: 2928/4927 cut-off events. [2024-06-14 11:29:19,685 INFO L125 PetriNetUnfolderBase]: For 453946/453946 co-relation queries the response was YES. [2024-06-14 11:29:19,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44182 conditions, 4927 events. 2928/4927 cut-off events. For 453946/453946 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32109 event pairs, 918 based on Foata normal form. 8/4932 useless extension candidates. Maximal degree in co-relation 43977. Up to 4334 conditions per place. [2024-06-14 11:29:19,762 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 713 selfloop transitions, 51 changer transitions 0/770 dead transitions. [2024-06-14 11:29:19,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 770 transitions, 17863 flow [2024-06-14 11:29:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:29:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:29:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:29:19,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-14 11:29:19,762 INFO L175 Difference]: Start difference. First operand has 450 places, 748 transitions, 16215 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:29:19,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 770 transitions, 17863 flow [2024-06-14 11:29:22,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 770 transitions, 17776 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:29:22,041 INFO L231 Difference]: Finished difference. Result has 456 places, 749 transitions, 16258 flow [2024-06-14 11:29:22,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16128, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16258, PETRI_PLACES=456, PETRI_TRANSITIONS=749} [2024-06-14 11:29:22,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 11:29:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 749 transitions, 16258 flow [2024-06-14 11:29:22,042 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) [2024-06-14 11:29:22,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:22,042 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] [2024-06-14 11:29:22,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:29:22,043 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)] === [2024-06-14 11:29:22,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash -439534063, now seen corresponding path program 5 times [2024-06-14 11:29:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:22,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056199558] [2024-06-14 11:29:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:22,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056199558] [2024-06-14 11:29:22,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056199558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:22,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:22,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:29:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386719018] [2024-06-14 11:29:22,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:22,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:29:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:29:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:29:22,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:22,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 749 transitions, 16258 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) [2024-06-14 11:29:22,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:22,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:22,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:23,294 INFO L124 PetriNetUnfolderBase]: 2943/4956 cut-off events. [2024-06-14 11:29:23,294 INFO L125 PetriNetUnfolderBase]: For 455182/455182 co-relation queries the response was YES. [2024-06-14 11:29:23,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44353 conditions, 4956 events. 2943/4956 cut-off events. For 455182/455182 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 32331 event pairs, 923 based on Foata normal form. 8/4961 useless extension candidates. Maximal degree in co-relation 44147. Up to 4359 conditions per place. [2024-06-14 11:29:23,374 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 713 selfloop transitions, 50 changer transitions 0/769 dead transitions. [2024-06-14 11:29:23,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 769 transitions, 17902 flow [2024-06-14 11:29:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:29:23,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:29:23,375 INFO L175 Difference]: Start difference. First operand has 456 places, 749 transitions, 16258 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:29:23,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 769 transitions, 17902 flow [2024-06-14 11:29:25,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 769 transitions, 17789 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 11:29:25,358 INFO L231 Difference]: Finished difference. Result has 456 places, 750 transitions, 16275 flow [2024-06-14 11:29:25,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16145, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16275, PETRI_PLACES=456, PETRI_TRANSITIONS=750} [2024-06-14 11:29:25,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 11:29:25,358 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 750 transitions, 16275 flow [2024-06-14 11:29:25,358 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) [2024-06-14 11:29:25,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:25,358 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] [2024-06-14 11:29:25,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:29:25,359 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)] === [2024-06-14 11:29:25,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash -439681933, now seen corresponding path program 6 times [2024-06-14 11:29:25,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:25,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768115749] [2024-06-14 11:29:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:25,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:25,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:25,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768115749] [2024-06-14 11:29:25,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768115749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:25,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:25,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:29:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047651444] [2024-06-14 11:29:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:29:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:29:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:29:25,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:25,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 750 transitions, 16275 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) [2024-06-14 11:29:25,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:25,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:25,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:26,644 INFO L124 PetriNetUnfolderBase]: 2963/4992 cut-off events. [2024-06-14 11:29:26,644 INFO L125 PetriNetUnfolderBase]: For 456384/456384 co-relation queries the response was YES. [2024-06-14 11:29:26,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44621 conditions, 4992 events. 2963/4992 cut-off events. For 456384/456384 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32651 event pairs, 923 based on Foata normal form. 6/4995 useless extension candidates. Maximal degree in co-relation 44414. Up to 4329 conditions per place. [2024-06-14 11:29:26,718 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 716 selfloop transitions, 53 changer transitions 0/775 dead transitions. [2024-06-14 11:29:26,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 775 transitions, 17986 flow [2024-06-14 11:29:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 11:29:26,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 11:29:26,719 INFO L175 Difference]: Start difference. First operand has 456 places, 750 transitions, 16275 flow. Second operand 8 states and 173 transitions. [2024-06-14 11:29:26,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 775 transitions, 17986 flow [2024-06-14 11:29:28,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 775 transitions, 17873 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:29:28,786 INFO L231 Difference]: Finished difference. Result has 459 places, 753 transitions, 16341 flow [2024-06-14 11:29:28,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16162, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16341, PETRI_PLACES=459, PETRI_TRANSITIONS=753} [2024-06-14 11:29:28,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-14 11:29:28,786 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 753 transitions, 16341 flow [2024-06-14 11:29:28,787 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) [2024-06-14 11:29:28,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:28,787 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] [2024-06-14 11:29:28,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:29:28,787 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)] === [2024-06-14 11:29:28,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash -433956481, now seen corresponding path program 1 times [2024-06-14 11:29:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:28,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072499803] [2024-06-14 11:29:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:28,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:28,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:28,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072499803] [2024-06-14 11:29:28,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072499803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:28,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:28,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:29:28,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144148505] [2024-06-14 11:29:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:28,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:29:28,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:28,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:29:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:29:28,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:28,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 753 transitions, 16341 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) [2024-06-14 11:29:28,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:28,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:28,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:30,033 INFO L124 PetriNetUnfolderBase]: 2950/4973 cut-off events. [2024-06-14 11:29:30,033 INFO L125 PetriNetUnfolderBase]: For 440991/440991 co-relation queries the response was YES. [2024-06-14 11:29:30,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44066 conditions, 4973 events. 2950/4973 cut-off events. For 440991/440991 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32507 event pairs, 916 based on Foata normal form. 6/4976 useless extension candidates. Maximal degree in co-relation 43857. Up to 4310 conditions per place. [2024-06-14 11:29:30,116 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 716 selfloop transitions, 55 changer transitions 0/777 dead transitions. [2024-06-14 11:29:30,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 777 transitions, 17998 flow [2024-06-14 11:29:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:29:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:29:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 11:29:30,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:29:30,117 INFO L175 Difference]: Start difference. First operand has 459 places, 753 transitions, 16341 flow. Second operand 10 states and 205 transitions. [2024-06-14 11:29:30,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 777 transitions, 17998 flow [2024-06-14 11:29:32,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 777 transitions, 17908 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:29:32,226 INFO L231 Difference]: Finished difference. Result has 465 places, 753 transitions, 16365 flow [2024-06-14 11:29:32,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16251, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16365, PETRI_PLACES=465, PETRI_TRANSITIONS=753} [2024-06-14 11:29:32,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-14 11:29:32,227 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 753 transitions, 16365 flow [2024-06-14 11:29:32,227 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) [2024-06-14 11:29:32,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:32,227 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] [2024-06-14 11:29:32,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:29:32,227 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)] === [2024-06-14 11:29:32,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash -194610593, now seen corresponding path program 7 times [2024-06-14 11:29:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:32,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290630883] [2024-06-14 11:29:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:32,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:32,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290630883] [2024-06-14 11:29:32,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290630883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:32,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:32,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549372916] [2024-06-14 11:29:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:32,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:32,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:32,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 753 transitions, 16365 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) [2024-06-14 11:29:32,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:32,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:32,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:33,432 INFO L124 PetriNetUnfolderBase]: 2978/5020 cut-off events. [2024-06-14 11:29:33,432 INFO L125 PetriNetUnfolderBase]: For 455673/455673 co-relation queries the response was YES. [2024-06-14 11:29:33,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44441 conditions, 5020 events. 2978/5020 cut-off events. For 455673/455673 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32845 event pairs, 916 based on Foata normal form. 8/5027 useless extension candidates. Maximal degree in co-relation 44230. Up to 4437 conditions per place. [2024-06-14 11:29:33,514 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 734 selfloop transitions, 33 changer transitions 0/773 dead transitions. [2024-06-14 11:29:33,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 773 transitions, 18011 flow [2024-06-14 11:29:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:29:33,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:29:33,515 INFO L175 Difference]: Start difference. First operand has 465 places, 753 transitions, 16365 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:29:33,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 773 transitions, 18011 flow [2024-06-14 11:29:35,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 773 transitions, 17848 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 11:29:35,946 INFO L231 Difference]: Finished difference. Result has 464 places, 754 transitions, 16292 flow [2024-06-14 11:29:35,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16203, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16292, PETRI_PLACES=464, PETRI_TRANSITIONS=754} [2024-06-14 11:29:35,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 11:29:35,947 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 754 transitions, 16292 flow [2024-06-14 11:29:35,947 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) [2024-06-14 11:29:35,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:35,947 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] [2024-06-14 11:29:35,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:29:35,947 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)] === [2024-06-14 11:29:35,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:35,947 INFO L85 PathProgramCache]: Analyzing trace with hash -999977549, now seen corresponding path program 8 times [2024-06-14 11:29:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:35,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516725896] [2024-06-14 11:29:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:35,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:36,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:36,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516725896] [2024-06-14 11:29:36,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516725896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:36,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:36,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:36,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209810523] [2024-06-14 11:29:36,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:36,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:36,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:36,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:36,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 754 transitions, 16292 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) [2024-06-14 11:29:36,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:36,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:36,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:37,179 INFO L124 PetriNetUnfolderBase]: 2960/4994 cut-off events. [2024-06-14 11:29:37,179 INFO L125 PetriNetUnfolderBase]: For 429669/429669 co-relation queries the response was YES. [2024-06-14 11:29:37,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43285 conditions, 4994 events. 2960/4994 cut-off events. For 429669/429669 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32713 event pairs, 909 based on Foata normal form. 8/5001 useless extension candidates. Maximal degree in co-relation 43074. Up to 4411 conditions per place. [2024-06-14 11:29:37,259 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 736 selfloop transitions, 33 changer transitions 0/775 dead transitions. [2024-06-14 11:29:37,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 775 transitions, 17937 flow [2024-06-14 11:29:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:29:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:29:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 11:29:37,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 11:29:37,261 INFO L175 Difference]: Start difference. First operand has 464 places, 754 transitions, 16292 flow. Second operand 7 states and 156 transitions. [2024-06-14 11:29:37,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 775 transitions, 17937 flow [2024-06-14 11:29:39,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 775 transitions, 17864 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:29:39,511 INFO L231 Difference]: Finished difference. Result has 465 places, 754 transitions, 16290 flow [2024-06-14 11:29:39,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16219, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16290, PETRI_PLACES=465, PETRI_TRANSITIONS=754} [2024-06-14 11:29:39,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-14 11:29:39,512 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 754 transitions, 16290 flow [2024-06-14 11:29:39,512 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) [2024-06-14 11:29:39,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:39,512 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] [2024-06-14 11:29:39,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:29:39,512 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)] === [2024-06-14 11:29:39,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash -200120843, now seen corresponding path program 9 times [2024-06-14 11:29:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571688273] [2024-06-14 11:29:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:39,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571688273] [2024-06-14 11:29:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571688273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:39,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:39,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64566193] [2024-06-14 11:29:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:39,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:39,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 754 transitions, 16290 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) [2024-06-14 11:29:39,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:39,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:39,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:40,733 INFO L124 PetriNetUnfolderBase]: 2947/4970 cut-off events. [2024-06-14 11:29:40,733 INFO L125 PetriNetUnfolderBase]: For 403088/403088 co-relation queries the response was YES. [2024-06-14 11:29:40,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42636 conditions, 4970 events. 2947/4970 cut-off events. For 403088/403088 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 32516 event pairs, 884 based on Foata normal form. 6/4975 useless extension candidates. Maximal degree in co-relation 42424. Up to 4305 conditions per place. [2024-06-14 11:29:40,815 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 738 selfloop transitions, 39 changer transitions 0/783 dead transitions. [2024-06-14 11:29:40,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 783 transitions, 18022 flow [2024-06-14 11:29:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:29:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:29:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 11:29:40,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 11:29:40,815 INFO L175 Difference]: Start difference. First operand has 465 places, 754 transitions, 16290 flow. Second operand 7 states and 162 transitions. [2024-06-14 11:29:40,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 783 transitions, 18022 flow [2024-06-14 11:29:42,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 783 transitions, 17933 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:29:42,925 INFO L231 Difference]: Finished difference. Result has 468 places, 756 transitions, 16334 flow [2024-06-14 11:29:42,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16209, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16334, PETRI_PLACES=468, PETRI_TRANSITIONS=756} [2024-06-14 11:29:42,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-14 11:29:42,926 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 756 transitions, 16334 flow [2024-06-14 11:29:42,926 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) [2024-06-14 11:29:42,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:42,926 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] [2024-06-14 11:29:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:29:42,926 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)] === [2024-06-14 11:29:42,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1775568387, now seen corresponding path program 2 times [2024-06-14 11:29:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:42,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374281119] [2024-06-14 11:29:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:43,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:43,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374281119] [2024-06-14 11:29:43,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374281119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:43,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:43,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:43,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831350236] [2024-06-14 11:29:43,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:43,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:43,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:43,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:43,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 756 transitions, 16334 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) [2024-06-14 11:29:43,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:43,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:43,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:44,151 INFO L124 PetriNetUnfolderBase]: 2934/4954 cut-off events. [2024-06-14 11:29:44,151 INFO L125 PetriNetUnfolderBase]: For 383840/383840 co-relation queries the response was YES. [2024-06-14 11:29:44,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42052 conditions, 4954 events. 2934/4954 cut-off events. For 383840/383840 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32409 event pairs, 880 based on Foata normal form. 6/4959 useless extension candidates. Maximal degree in co-relation 41838. Up to 4283 conditions per place. [2024-06-14 11:29:44,230 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 732 selfloop transitions, 40 changer transitions 0/778 dead transitions. [2024-06-14 11:29:44,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 778 transitions, 17989 flow [2024-06-14 11:29:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:29:44,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:29:44,231 INFO L175 Difference]: Start difference. First operand has 468 places, 756 transitions, 16334 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:29:44,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 778 transitions, 17989 flow [2024-06-14 11:29:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 778 transitions, 17801 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 11:29:46,446 INFO L231 Difference]: Finished difference. Result has 469 places, 756 transitions, 16232 flow [2024-06-14 11:29:46,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16146, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16232, PETRI_PLACES=469, PETRI_TRANSITIONS=756} [2024-06-14 11:29:46,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-14 11:29:46,446 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 756 transitions, 16232 flow [2024-06-14 11:29:46,447 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) [2024-06-14 11:29:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:46,447 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] [2024-06-14 11:29:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:29:46,447 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)] === [2024-06-14 11:29:46,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1032821650, now seen corresponding path program 1 times [2024-06-14 11:29:46,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:46,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290565603] [2024-06-14 11:29:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:46,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:46,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:46,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290565603] [2024-06-14 11:29:46,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290565603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:46,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:46,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:29:46,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120417849] [2024-06-14 11:29:46,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:29:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:46,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:29:46,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:29:46,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:29:46,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 756 transitions, 16232 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:46,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:46,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:29:46,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:47,813 INFO L124 PetriNetUnfolderBase]: 3014/5075 cut-off events. [2024-06-14 11:29:47,814 INFO L125 PetriNetUnfolderBase]: For 423371/423371 co-relation queries the response was YES. [2024-06-14 11:29:47,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43774 conditions, 5075 events. 3014/5075 cut-off events. For 423371/423371 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 33149 event pairs, 324 based on Foata normal form. 2/5068 useless extension candidates. Maximal degree in co-relation 43561. Up to 3223 conditions per place. [2024-06-14 11:29:47,895 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 596 selfloop transitions, 189 changer transitions 0/791 dead transitions. [2024-06-14 11:29:47,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 791 transitions, 18463 flow [2024-06-14 11:29:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 11:29:47,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:29:47,896 INFO L175 Difference]: Start difference. First operand has 469 places, 756 transitions, 16232 flow. Second operand 8 states and 176 transitions. [2024-06-14 11:29:47,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 791 transitions, 18463 flow [2024-06-14 11:29:50,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 791 transitions, 18362 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 11:29:50,476 INFO L231 Difference]: Finished difference. Result has 471 places, 761 transitions, 16663 flow [2024-06-14 11:29:50,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16131, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16663, PETRI_PLACES=471, PETRI_TRANSITIONS=761} [2024-06-14 11:29:50,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-14 11:29:50,476 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 761 transitions, 16663 flow [2024-06-14 11:29:50,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:50,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:50,476 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] [2024-06-14 11:29:50,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:29:50,476 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)] === [2024-06-14 11:29:50,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash -574378680, now seen corresponding path program 2 times [2024-06-14 11:29:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:50,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045553909] [2024-06-14 11:29:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:50,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:50,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:50,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045553909] [2024-06-14 11:29:50,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045553909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:50,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:50,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:29:50,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026779599] [2024-06-14 11:29:50,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:50,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:29:50,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:29:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:29:50,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:29:50,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 761 transitions, 16663 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:50,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:50,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:29:50,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:51,818 INFO L124 PetriNetUnfolderBase]: 3042/5117 cut-off events. [2024-06-14 11:29:51,818 INFO L125 PetriNetUnfolderBase]: For 451832/451832 co-relation queries the response was YES. [2024-06-14 11:29:51,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45073 conditions, 5117 events. 3042/5117 cut-off events. For 451832/451832 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 33445 event pairs, 409 based on Foata normal form. 2/5110 useless extension candidates. Maximal degree in co-relation 44857. Up to 4370 conditions per place. [2024-06-14 11:29:51,901 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 732 selfloop transitions, 45 changer transitions 0/783 dead transitions. [2024-06-14 11:29:51,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 783 transitions, 18495 flow [2024-06-14 11:29:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:29:51,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-14 11:29:51,902 INFO L175 Difference]: Start difference. First operand has 471 places, 761 transitions, 16663 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:29:51,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 783 transitions, 18495 flow [2024-06-14 11:29:54,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 783 transitions, 18234 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-14 11:29:54,781 INFO L231 Difference]: Finished difference. Result has 477 places, 762 transitions, 16524 flow [2024-06-14 11:29:54,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16406, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16524, PETRI_PLACES=477, PETRI_TRANSITIONS=762} [2024-06-14 11:29:54,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 11:29:54,781 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 762 transitions, 16524 flow [2024-06-14 11:29:54,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:54,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:54,782 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] [2024-06-14 11:29:54,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:29:54,782 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)] === [2024-06-14 11:29:54,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2129521336, now seen corresponding path program 3 times [2024-06-14 11:29:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:54,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674629103] [2024-06-14 11:29:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:54,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:54,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674629103] [2024-06-14 11:29:54,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674629103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:54,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:54,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:29:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690760973] [2024-06-14 11:29:54,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:29:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:29:54,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:29:54,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:29:54,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 762 transitions, 16524 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:54,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:54,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:29:54,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:56,160 INFO L124 PetriNetUnfolderBase]: 3050/5133 cut-off events. [2024-06-14 11:29:56,160 INFO L125 PetriNetUnfolderBase]: For 451523/451523 co-relation queries the response was YES. [2024-06-14 11:29:56,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45186 conditions, 5133 events. 3050/5133 cut-off events. For 451523/451523 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 33601 event pairs, 554 based on Foata normal form. 2/5130 useless extension candidates. Maximal degree in co-relation 44967. Up to 4223 conditions per place. [2024-06-14 11:29:56,247 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 612 selfloop transitions, 174 changer transitions 0/792 dead transitions. [2024-06-14 11:29:56,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 792 transitions, 18526 flow [2024-06-14 11:29:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:29:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:29:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:29:56,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:29:56,248 INFO L175 Difference]: Start difference. First operand has 477 places, 762 transitions, 16524 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:29:56,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 792 transitions, 18526 flow [2024-06-14 11:29:58,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 792 transitions, 18305 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:29:58,938 INFO L231 Difference]: Finished difference. Result has 477 places, 766 transitions, 16781 flow [2024-06-14 11:29:58,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16303, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16781, PETRI_PLACES=477, PETRI_TRANSITIONS=766} [2024-06-14 11:29:58,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 11:29:58,939 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 766 transitions, 16781 flow [2024-06-14 11:29:58,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:58,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:58,939 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] [2024-06-14 11:29:58,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:29:58,939 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:58,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:58,939 INFO L85 PathProgramCache]: Analyzing trace with hash 252805402, now seen corresponding path program 4 times [2024-06-14 11:29:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:58,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419566227] [2024-06-14 11:29:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:58,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:59,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:59,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419566227] [2024-06-14 11:29:59,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419566227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:59,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:59,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:29:59,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065887158] [2024-06-14 11:29:59,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:59,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:29:59,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:59,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:29:59,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:29:59,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:29:59,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 766 transitions, 16781 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:59,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:59,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:29:59,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:00,291 INFO L124 PetriNetUnfolderBase]: 3045/5126 cut-off events. [2024-06-14 11:30:00,291 INFO L125 PetriNetUnfolderBase]: For 450828/450828 co-relation queries the response was YES. [2024-06-14 11:30:00,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45029 conditions, 5126 events. 3045/5126 cut-off events. For 450828/450828 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 33554 event pairs, 552 based on Foata normal form. 2/5123 useless extension candidates. Maximal degree in co-relation 44809. Up to 4272 conditions per place. [2024-06-14 11:30:00,377 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 607 selfloop transitions, 174 changer transitions 0/787 dead transitions. [2024-06-14 11:30:00,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 787 transitions, 18446 flow [2024-06-14 11:30:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:30:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:30:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:30:00,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-14 11:30:00,378 INFO L175 Difference]: Start difference. First operand has 477 places, 766 transitions, 16781 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:30:00,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 787 transitions, 18446 flow [2024-06-14 11:30:03,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 787 transitions, 18139 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 11:30:03,542 INFO L231 Difference]: Finished difference. Result has 481 places, 766 transitions, 16829 flow [2024-06-14 11:30:03,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16474, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16829, PETRI_PLACES=481, PETRI_TRANSITIONS=766} [2024-06-14 11:30:03,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 11:30:03,543 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 766 transitions, 16829 flow [2024-06-14 11:30:03,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:03,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:03,543 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] [2024-06-14 11:30:03,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 11:30:03,544 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 249091447, now seen corresponding path program 1 times [2024-06-14 11:30:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255032127] [2024-06-14 11:30:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:03,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:03,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255032127] [2024-06-14 11:30:03,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255032127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:03,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:03,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:30:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855212099] [2024-06-14 11:30:03,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:03,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:30:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:30:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:30:03,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:03,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 766 transitions, 16829 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:03,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:03,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:03,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:05,049 INFO L124 PetriNetUnfolderBase]: 3070/5164 cut-off events. [2024-06-14 11:30:05,050 INFO L125 PetriNetUnfolderBase]: For 457602/457602 co-relation queries the response was YES. [2024-06-14 11:30:05,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45787 conditions, 5164 events. 3070/5164 cut-off events. For 457602/457602 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 33856 event pairs, 562 based on Foata normal form. 1/5162 useless extension candidates. Maximal degree in co-relation 45565. Up to 4207 conditions per place. [2024-06-14 11:30:05,137 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 543 selfloop transitions, 269 changer transitions 0/818 dead transitions. [2024-06-14 11:30:05,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 818 transitions, 19751 flow [2024-06-14 11:30:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:30:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:30:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 11:30:05,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 11:30:05,137 INFO L175 Difference]: Start difference. First operand has 481 places, 766 transitions, 16829 flow. Second operand 11 states and 241 transitions. [2024-06-14 11:30:05,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 818 transitions, 19751 flow [2024-06-14 11:30:07,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 818 transitions, 19273 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:30:07,870 INFO L231 Difference]: Finished difference. Result has 487 places, 782 transitions, 17512 flow [2024-06-14 11:30:07,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16386, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17512, PETRI_PLACES=487, PETRI_TRANSITIONS=782} [2024-06-14 11:30:07,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 11:30:07,870 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 782 transitions, 17512 flow [2024-06-14 11:30:07,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:07,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:07,871 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] [2024-06-14 11:30:07,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 11:30:07,871 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:07,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1320088257, now seen corresponding path program 2 times [2024-06-14 11:30:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:07,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242469003] [2024-06-14 11:30:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:08,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:08,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242469003] [2024-06-14 11:30:08,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242469003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:08,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:08,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:08,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631160883] [2024-06-14 11:30:08,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:08,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:08,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:08,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:08,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:08,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:08,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 782 transitions, 17512 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:08,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:08,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:08,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:09,399 INFO L124 PetriNetUnfolderBase]: 3088/5195 cut-off events. [2024-06-14 11:30:09,399 INFO L125 PetriNetUnfolderBase]: For 473011/473011 co-relation queries the response was YES. [2024-06-14 11:30:09,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46483 conditions, 5195 events. 3088/5195 cut-off events. For 473011/473011 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34075 event pairs, 567 based on Foata normal form. 1/5193 useless extension candidates. Maximal degree in co-relation 46258. Up to 4226 conditions per place. [2024-06-14 11:30:09,489 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 551 selfloop transitions, 271 changer transitions 0/828 dead transitions. [2024-06-14 11:30:09,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 828 transitions, 20259 flow [2024-06-14 11:30:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:30:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:30:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-14 11:30:09,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 11:30:09,490 INFO L175 Difference]: Start difference. First operand has 487 places, 782 transitions, 17512 flow. Second operand 12 states and 261 transitions. [2024-06-14 11:30:09,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 828 transitions, 20259 flow [2024-06-14 11:30:12,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 828 transitions, 19957 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:30:12,172 INFO L231 Difference]: Finished difference. Result has 495 places, 791 transitions, 17995 flow [2024-06-14 11:30:12,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17218, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17995, PETRI_PLACES=495, PETRI_TRANSITIONS=791} [2024-06-14 11:30:12,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-14 11:30:12,172 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 791 transitions, 17995 flow [2024-06-14 11:30:12,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:12,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:12,173 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] [2024-06-14 11:30:12,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 11:30:12,173 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:12,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -515891211, now seen corresponding path program 3 times [2024-06-14 11:30:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893595516] [2024-06-14 11:30:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:12,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:12,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:12,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893595516] [2024-06-14 11:30:12,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893595516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:12,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:12,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:12,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468979716] [2024-06-14 11:30:12,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:12,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:12,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:12,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:12,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 791 transitions, 17995 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:12,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:12,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:12,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:13,822 INFO L124 PetriNetUnfolderBase]: 3085/5191 cut-off events. [2024-06-14 11:30:13,823 INFO L125 PetriNetUnfolderBase]: For 479617/479617 co-relation queries the response was YES. [2024-06-14 11:30:13,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46561 conditions, 5191 events. 3085/5191 cut-off events. For 479617/479617 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34064 event pairs, 567 based on Foata normal form. 1/5189 useless extension candidates. Maximal degree in co-relation 46334. Up to 4223 conditions per place. [2024-06-14 11:30:13,903 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 549 selfloop transitions, 274 changer transitions 0/829 dead transitions. [2024-06-14 11:30:13,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 829 transitions, 20351 flow [2024-06-14 11:30:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:30:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:30:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 294 transitions. [2024-06-14 11:30:13,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:30:13,904 INFO L175 Difference]: Start difference. First operand has 495 places, 791 transitions, 17995 flow. Second operand 14 states and 294 transitions. [2024-06-14 11:30:13,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 829 transitions, 20351 flow [2024-06-14 11:30:16,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 829 transitions, 19783 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 11:30:16,671 INFO L231 Difference]: Finished difference. Result has 499 places, 791 transitions, 17989 flow [2024-06-14 11:30:16,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17427, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17989, PETRI_PLACES=499, PETRI_TRANSITIONS=791} [2024-06-14 11:30:16,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-14 11:30:16,672 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 791 transitions, 17989 flow [2024-06-14 11:30:16,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:16,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:16,672 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] [2024-06-14 11:30:16,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 11:30:16,672 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:16,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1450127888, now seen corresponding path program 5 times [2024-06-14 11:30:16,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:16,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595362802] [2024-06-14 11:30:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:16,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595362802] [2024-06-14 11:30:16,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595362802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:16,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:16,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:30:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203110281] [2024-06-14 11:30:16,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:16,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:30:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:16,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:30:16,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:30:16,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:16,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 791 transitions, 17989 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:16,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:16,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:16,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:18,124 INFO L124 PetriNetUnfolderBase]: 3093/5168 cut-off events. [2024-06-14 11:30:18,124 INFO L125 PetriNetUnfolderBase]: For 499063/499063 co-relation queries the response was YES. [2024-06-14 11:30:18,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46741 conditions, 5168 events. 3093/5168 cut-off events. For 499063/499063 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 33624 event pairs, 626 based on Foata normal form. 2/5132 useless extension candidates. Maximal degree in co-relation 46513. Up to 4042 conditions per place. [2024-06-14 11:30:18,213 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 553 selfloop transitions, 263 changer transitions 0/822 dead transitions. [2024-06-14 11:30:18,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 822 transitions, 20083 flow [2024-06-14 11:30:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:30:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:30:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:30:18,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-14 11:30:18,214 INFO L175 Difference]: Start difference. First operand has 499 places, 791 transitions, 17989 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:30:18,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 822 transitions, 20083 flow [2024-06-14 11:30:20,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 822 transitions, 19728 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:30:20,843 INFO L231 Difference]: Finished difference. Result has 499 places, 795 transitions, 18289 flow [2024-06-14 11:30:20,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17634, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18289, PETRI_PLACES=499, PETRI_TRANSITIONS=795} [2024-06-14 11:30:20,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-14 11:30:20,848 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 795 transitions, 18289 flow [2024-06-14 11:30:20,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:20,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:20,848 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] [2024-06-14 11:30:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 11:30:20,849 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:20,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1820349304, now seen corresponding path program 6 times [2024-06-14 11:30:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:20,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982349649] [2024-06-14 11:30:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:20,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:20,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982349649] [2024-06-14 11:30:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982349649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:20,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:30:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413630106] [2024-06-14 11:30:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:20,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:30:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:30:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:30:21,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:21,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 795 transitions, 18289 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:21,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:21,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:21,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:22,302 INFO L124 PetriNetUnfolderBase]: 3101/5185 cut-off events. [2024-06-14 11:30:22,302 INFO L125 PetriNetUnfolderBase]: For 512771/512771 co-relation queries the response was YES. [2024-06-14 11:30:22,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47179 conditions, 5185 events. 3101/5185 cut-off events. For 512771/512771 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 33864 event pairs, 632 based on Foata normal form. 2/5154 useless extension candidates. Maximal degree in co-relation 46950. Up to 4111 conditions per place. [2024-06-14 11:30:22,392 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 551 selfloop transitions, 262 changer transitions 0/819 dead transitions. [2024-06-14 11:30:22,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 819 transitions, 20103 flow [2024-06-14 11:30:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:30:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:30:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 11:30:22,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:30:22,393 INFO L175 Difference]: Start difference. First operand has 499 places, 795 transitions, 18289 flow. Second operand 8 states and 164 transitions. [2024-06-14 11:30:22,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 819 transitions, 20103 flow [2024-06-14 11:30:25,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 819 transitions, 19678 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 11:30:25,350 INFO L231 Difference]: Finished difference. Result has 502 places, 797 transitions, 18463 flow [2024-06-14 11:30:25,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17888, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18463, PETRI_PLACES=502, PETRI_TRANSITIONS=797} [2024-06-14 11:30:25,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-14 11:30:25,351 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 797 transitions, 18463 flow [2024-06-14 11:30:25,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:25,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:25,351 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] [2024-06-14 11:30:25,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 11:30:25,351 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:25,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:25,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2107236634, now seen corresponding path program 7 times [2024-06-14 11:30:25,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:25,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642890600] [2024-06-14 11:30:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:25,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:25,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:25,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642890600] [2024-06-14 11:30:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642890600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:25,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:25,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:30:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788983292] [2024-06-14 11:30:25,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:25,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:30:25,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:30:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:30:25,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:25,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 797 transitions, 18463 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:25,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:25,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:25,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:26,816 INFO L124 PetriNetUnfolderBase]: 3109/5198 cut-off events. [2024-06-14 11:30:26,816 INFO L125 PetriNetUnfolderBase]: For 519381/519381 co-relation queries the response was YES. [2024-06-14 11:30:26,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47669 conditions, 5198 events. 3109/5198 cut-off events. For 519381/519381 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 33922 event pairs, 629 based on Foata normal form. 2/5168 useless extension candidates. Maximal degree in co-relation 47438. Up to 4123 conditions per place. [2024-06-14 11:30:26,908 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 552 selfloop transitions, 260 changer transitions 0/818 dead transitions. [2024-06-14 11:30:26,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 818 transitions, 20241 flow [2024-06-14 11:30:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:30:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:30:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 11:30:26,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-14 11:30:26,909 INFO L175 Difference]: Start difference. First operand has 502 places, 797 transitions, 18463 flow. Second operand 8 states and 162 transitions. [2024-06-14 11:30:26,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 818 transitions, 20241 flow [2024-06-14 11:30:30,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 818 transitions, 19690 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 11:30:30,020 INFO L231 Difference]: Finished difference. Result has 504 places, 799 transitions, 18487 flow [2024-06-14 11:30:30,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17912, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18487, PETRI_PLACES=504, PETRI_TRANSITIONS=799} [2024-06-14 11:30:30,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-14 11:30:30,021 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 799 transitions, 18487 flow [2024-06-14 11:30:30,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:30,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:30,021 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] [2024-06-14 11:30:30,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 11:30:30,021 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:30,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1655717578, now seen corresponding path program 8 times [2024-06-14 11:30:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:30,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293980099] [2024-06-14 11:30:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:30,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:30,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293980099] [2024-06-14 11:30:30,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293980099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:30,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:30,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:30:30,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645722335] [2024-06-14 11:30:30,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:30,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:30:30,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:30,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:30:30,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:30:30,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:30,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 799 transitions, 18487 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:30,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:30,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:30,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:31,576 INFO L124 PetriNetUnfolderBase]: 3104/5222 cut-off events. [2024-06-14 11:30:31,576 INFO L125 PetriNetUnfolderBase]: For 509830/509830 co-relation queries the response was YES. [2024-06-14 11:30:31,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47468 conditions, 5222 events. 3104/5222 cut-off events. For 509830/509830 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 34321 event pairs, 572 based on Foata normal form. 2/5219 useless extension candidates. Maximal degree in co-relation 47236. Up to 4558 conditions per place. [2024-06-14 11:30:31,660 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 717 selfloop transitions, 89 changer transitions 0/812 dead transitions. [2024-06-14 11:30:31,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 812 transitions, 20135 flow [2024-06-14 11:30:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:30:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:30:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:30:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 11:30:31,661 INFO L175 Difference]: Start difference. First operand has 504 places, 799 transitions, 18487 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:30:31,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 812 transitions, 20135 flow [2024-06-14 11:30:34,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 812 transitions, 19554 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:30:34,071 INFO L231 Difference]: Finished difference. Result has 507 places, 799 transitions, 18091 flow [2024-06-14 11:30:34,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17906, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18091, PETRI_PLACES=507, PETRI_TRANSITIONS=799} [2024-06-14 11:30:34,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-14 11:30:34,072 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 799 transitions, 18091 flow [2024-06-14 11:30:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:34,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:34,072 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] [2024-06-14 11:30:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 11:30:34,072 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:34,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1929819963, now seen corresponding path program 4 times [2024-06-14 11:30:34,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:34,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783613972] [2024-06-14 11:30:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:34,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:34,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783613972] [2024-06-14 11:30:34,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783613972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:34,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:34,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57430998] [2024-06-14 11:30:34,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:34,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:34,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:34,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:34,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 799 transitions, 18091 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:34,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:34,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:34,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:35,625 INFO L124 PetriNetUnfolderBase]: 3147/5285 cut-off events. [2024-06-14 11:30:35,626 INFO L125 PetriNetUnfolderBase]: For 524351/524351 co-relation queries the response was YES. [2024-06-14 11:30:35,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47715 conditions, 5285 events. 3147/5285 cut-off events. For 524351/524351 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 34772 event pairs, 583 based on Foata normal form. 1/5266 useless extension candidates. Maximal degree in co-relation 47482. Up to 3761 conditions per place. [2024-06-14 11:30:35,719 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 393 selfloop transitions, 473 changer transitions 0/872 dead transitions. [2024-06-14 11:30:35,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 872 transitions, 21269 flow [2024-06-14 11:30:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:30:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:30:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 287 transitions. [2024-06-14 11:30:35,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:30:35,719 INFO L175 Difference]: Start difference. First operand has 507 places, 799 transitions, 18091 flow. Second operand 14 states and 287 transitions. [2024-06-14 11:30:35,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 872 transitions, 21269 flow [2024-06-14 11:30:38,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 872 transitions, 21076 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 11:30:38,794 INFO L231 Difference]: Finished difference. Result has 515 places, 820 transitions, 19255 flow [2024-06-14 11:30:38,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17898, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19255, PETRI_PLACES=515, PETRI_TRANSITIONS=820} [2024-06-14 11:30:38,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-14 11:30:38,795 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 820 transitions, 19255 flow [2024-06-14 11:30:38,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:38,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:38,795 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] [2024-06-14 11:30:38,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 11:30:38,795 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:38,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash -869564327, now seen corresponding path program 5 times [2024-06-14 11:30:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:38,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200449233] [2024-06-14 11:30:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:38,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:38,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200449233] [2024-06-14 11:30:38,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200449233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:38,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:38,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532788366] [2024-06-14 11:30:38,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:38,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:38,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:38,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:38,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:38,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 820 transitions, 19255 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:38,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:38,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:38,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:40,449 INFO L124 PetriNetUnfolderBase]: 3160/5303 cut-off events. [2024-06-14 11:30:40,450 INFO L125 PetriNetUnfolderBase]: For 545412/545412 co-relation queries the response was YES. [2024-06-14 11:30:40,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49009 conditions, 5303 events. 3160/5303 cut-off events. For 545412/545412 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 34904 event pairs, 590 based on Foata normal form. 1/5282 useless extension candidates. Maximal degree in co-relation 48774. Up to 3776 conditions per place. [2024-06-14 11:30:40,543 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 391 selfloop transitions, 479 changer transitions 0/876 dead transitions. [2024-06-14 11:30:40,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 876 transitions, 22200 flow [2024-06-14 11:30:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:30:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:30:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 299 transitions. [2024-06-14 11:30:40,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861788617886179 [2024-06-14 11:30:40,544 INFO L175 Difference]: Start difference. First operand has 515 places, 820 transitions, 19255 flow. Second operand 15 states and 299 transitions. [2024-06-14 11:30:40,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 876 transitions, 22200 flow [2024-06-14 11:30:43,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 876 transitions, 21094 flow, removed 75 selfloop flow, removed 9 redundant places. [2024-06-14 11:30:43,947 INFO L231 Difference]: Finished difference. Result has 521 places, 826 transitions, 19263 flow [2024-06-14 11:30:43,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18217, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=19263, PETRI_PLACES=521, PETRI_TRANSITIONS=826} [2024-06-14 11:30:43,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-14 11:30:43,948 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 826 transitions, 19263 flow [2024-06-14 11:30:43,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:43,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:43,948 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] [2024-06-14 11:30:43,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 11:30:43,948 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:43,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1441546313, now seen corresponding path program 6 times [2024-06-14 11:30:43,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:43,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806208393] [2024-06-14 11:30:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:43,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:44,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806208393] [2024-06-14 11:30:44,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806208393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:44,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:44,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:44,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526047717] [2024-06-14 11:30:44,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:44,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:44,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:44,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 826 transitions, 19263 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:44,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:44,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:44,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:45,569 INFO L124 PetriNetUnfolderBase]: 3157/5299 cut-off events. [2024-06-14 11:30:45,569 INFO L125 PetriNetUnfolderBase]: For 546508/546508 co-relation queries the response was YES. [2024-06-14 11:30:45,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48774 conditions, 5299 events. 3157/5299 cut-off events. For 546508/546508 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 34943 event pairs, 590 based on Foata normal form. 1/5278 useless extension candidates. Maximal degree in co-relation 48538. Up to 3773 conditions per place. [2024-06-14 11:30:45,662 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 390 selfloop transitions, 479 changer transitions 0/875 dead transitions. [2024-06-14 11:30:45,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 875 transitions, 21848 flow [2024-06-14 11:30:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:30:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:30:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-14 11:30:45,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-14 11:30:45,663 INFO L175 Difference]: Start difference. First operand has 521 places, 826 transitions, 19263 flow. Second operand 15 states and 298 transitions. [2024-06-14 11:30:45,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 875 transitions, 21848 flow [2024-06-14 11:30:49,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 875 transitions, 21273 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:30:49,039 INFO L231 Difference]: Finished difference. Result has 529 places, 826 transitions, 19652 flow [2024-06-14 11:30:49,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18688, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=19652, PETRI_PLACES=529, PETRI_TRANSITIONS=826} [2024-06-14 11:30:49,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-14 11:30:49,047 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 826 transitions, 19652 flow [2024-06-14 11:30:49,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:49,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:49,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:49,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 11:30:49,047 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:49,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash -975819345, now seen corresponding path program 7 times [2024-06-14 11:30:49,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:49,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001276291] [2024-06-14 11:30:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:49,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:49,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:49,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001276291] [2024-06-14 11:30:49,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001276291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:49,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:49,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:30:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953688605] [2024-06-14 11:30:49,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:49,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:30:49,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:49,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:30:49,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:30:49,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:49,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 826 transitions, 19652 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:49,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:49,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:49,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:50,663 INFO L124 PetriNetUnfolderBase]: 3221/5427 cut-off events. [2024-06-14 11:30:50,663 INFO L125 PetriNetUnfolderBase]: For 577998/578007 co-relation queries the response was YES. [2024-06-14 11:30:50,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50210 conditions, 5427 events. 3221/5427 cut-off events. For 577998/578007 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 36057 event pairs, 575 based on Foata normal form. 7/5417 useless extension candidates. Maximal degree in co-relation 49971. Up to 3833 conditions per place. [2024-06-14 11:30:50,757 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 373 selfloop transitions, 525 changer transitions 0/904 dead transitions. [2024-06-14 11:30:50,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 904 transitions, 23337 flow [2024-06-14 11:30:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:30:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:30:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-14 11:30:50,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:30:50,758 INFO L175 Difference]: Start difference. First operand has 529 places, 826 transitions, 19652 flow. Second operand 12 states and 252 transitions. [2024-06-14 11:30:50,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 904 transitions, 23337 flow [2024-06-14 11:30:54,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 904 transitions, 22473 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-14 11:30:54,223 INFO L231 Difference]: Finished difference. Result has 530 places, 861 transitions, 20747 flow [2024-06-14 11:30:54,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18823, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20747, PETRI_PLACES=530, PETRI_TRANSITIONS=861} [2024-06-14 11:30:54,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-14 11:30:54,224 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 861 transitions, 20747 flow [2024-06-14 11:30:54,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:54,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:54,224 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] [2024-06-14 11:30:54,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 11:30:54,224 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:54,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1008494369, now seen corresponding path program 8 times [2024-06-14 11:30:54,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:54,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832518040] [2024-06-14 11:30:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:54,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:54,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832518040] [2024-06-14 11:30:54,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832518040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:54,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:54,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:30:54,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625143688] [2024-06-14 11:30:54,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:54,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:30:54,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:30:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:30:54,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:30:54,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 861 transitions, 20747 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:54,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:54,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:30:54,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:55,901 INFO L124 PetriNetUnfolderBase]: 3242/5462 cut-off events. [2024-06-14 11:30:55,902 INFO L125 PetriNetUnfolderBase]: For 603267/603276 co-relation queries the response was YES. [2024-06-14 11:30:55,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51390 conditions, 5462 events. 3242/5462 cut-off events. For 603267/603276 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 36353 event pairs, 575 based on Foata normal form. 7/5452 useless extension candidates. Maximal degree in co-relation 51146. Up to 3857 conditions per place. [2024-06-14 11:30:55,999 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 379 selfloop transitions, 527 changer transitions 0/912 dead transitions. [2024-06-14 11:30:55,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 912 transitions, 24237 flow [2024-06-14 11:30:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:30:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:30:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-14 11:30:55,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-14 11:30:55,999 INFO L175 Difference]: Start difference. First operand has 530 places, 861 transitions, 20747 flow. Second operand 13 states and 269 transitions. [2024-06-14 11:30:55,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 912 transitions, 24237 flow [2024-06-14 11:31:00,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 912 transitions, 23590 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-06-14 11:31:00,087 INFO L231 Difference]: Finished difference. Result has 542 places, 872 transitions, 21518 flow [2024-06-14 11:31:00,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20169, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=21518, PETRI_PLACES=542, PETRI_TRANSITIONS=872} [2024-06-14 11:31:00,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-14 11:31:00,087 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 872 transitions, 21518 flow [2024-06-14 11:31:00,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:00,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:00,088 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] [2024-06-14 11:31:00,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 11:31:00,088 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:00,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1008483209, now seen corresponding path program 9 times [2024-06-14 11:31:00,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:00,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118542917] [2024-06-14 11:31:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:00,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:00,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:00,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118542917] [2024-06-14 11:31:00,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118542917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:00,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:00,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:31:00,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556600906] [2024-06-14 11:31:00,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:00,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:31:00,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:31:00,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:31:00,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:00,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 872 transitions, 21518 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:00,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:00,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:00,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:01,883 INFO L124 PetriNetUnfolderBase]: 3239/5458 cut-off events. [2024-06-14 11:31:01,883 INFO L125 PetriNetUnfolderBase]: For 613488/613497 co-relation queries the response was YES. [2024-06-14 11:31:01,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51622 conditions, 5458 events. 3239/5458 cut-off events. For 613488/613497 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 36308 event pairs, 575 based on Foata normal form. 7/5448 useless extension candidates. Maximal degree in co-relation 51375. Up to 3854 conditions per place. [2024-06-14 11:31:01,972 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 378 selfloop transitions, 525 changer transitions 0/909 dead transitions. [2024-06-14 11:31:01,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 909 transitions, 24529 flow [2024-06-14 11:31:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:31:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:31:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 11:31:01,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 11:31:01,973 INFO L175 Difference]: Start difference. First operand has 542 places, 872 transitions, 21518 flow. Second operand 11 states and 236 transitions. [2024-06-14 11:31:01,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 909 transitions, 24529 flow [2024-06-14 11:31:05,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 909 transitions, 23545 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:31:05,848 INFO L231 Difference]: Finished difference. Result has 548 places, 872 transitions, 21593 flow [2024-06-14 11:31:05,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20536, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21593, PETRI_PLACES=548, PETRI_TRANSITIONS=872} [2024-06-14 11:31:05,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-14 11:31:05,849 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 872 transitions, 21593 flow [2024-06-14 11:31:05,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:05,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:05,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:05,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 11:31:05,849 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:05,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1459588068, now seen corresponding path program 1 times [2024-06-14 11:31:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:05,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127365587] [2024-06-14 11:31:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:05,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127365587] [2024-06-14 11:31:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127365587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:05,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:05,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:31:05,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26831074] [2024-06-14 11:31:05,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:05,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:31:05,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:05,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:31:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:31:06,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:06,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 872 transitions, 21593 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:06,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:06,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:06,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:07,521 INFO L124 PetriNetUnfolderBase]: 3247/5464 cut-off events. [2024-06-14 11:31:07,521 INFO L125 PetriNetUnfolderBase]: For 631101/631101 co-relation queries the response was YES. [2024-06-14 11:31:07,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51794 conditions, 5464 events. 3247/5464 cut-off events. For 631101/631101 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 36365 event pairs, 744 based on Foata normal form. 2/5455 useless extension candidates. Maximal degree in co-relation 51545. Up to 4530 conditions per place. [2024-06-14 11:31:07,624 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 644 selfloop transitions, 250 changer transitions 0/900 dead transitions. [2024-06-14 11:31:07,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 900 transitions, 23633 flow [2024-06-14 11:31:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:31:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:31:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 11:31:07,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-14 11:31:07,624 INFO L175 Difference]: Start difference. First operand has 548 places, 872 transitions, 21593 flow. Second operand 11 states and 225 transitions. [2024-06-14 11:31:07,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 900 transitions, 23633 flow [2024-06-14 11:31:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 900 transitions, 22778 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:31:11,988 INFO L231 Difference]: Finished difference. Result has 551 places, 874 transitions, 21308 flow [2024-06-14 11:31:11,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20738, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21308, PETRI_PLACES=551, PETRI_TRANSITIONS=874} [2024-06-14 11:31:11,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-14 11:31:11,989 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 874 transitions, 21308 flow [2024-06-14 11:31:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:11,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:11,989 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] [2024-06-14 11:31:11,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 11:31:11,989 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:11,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash -582325457, now seen corresponding path program 10 times [2024-06-14 11:31:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:11,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516084864] [2024-06-14 11:31:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:11,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:12,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:12,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516084864] [2024-06-14 11:31:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516084864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:12,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:12,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:12,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368958608] [2024-06-14 11:31:12,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:12,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:12,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:12,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:12,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:12,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:12,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 874 transitions, 21308 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:12,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:12,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:12,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:13,715 INFO L124 PetriNetUnfolderBase]: 3252/5460 cut-off events. [2024-06-14 11:31:13,715 INFO L125 PetriNetUnfolderBase]: For 632653/632653 co-relation queries the response was YES. [2024-06-14 11:31:13,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51499 conditions, 5460 events. 3252/5460 cut-off events. For 632653/632653 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 36166 event pairs, 602 based on Foata normal form. 1/5439 useless extension candidates. Maximal degree in co-relation 51249. Up to 3872 conditions per place. [2024-06-14 11:31:13,813 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 392 selfloop transitions, 515 changer transitions 0/913 dead transitions. [2024-06-14 11:31:13,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 913 transitions, 23945 flow [2024-06-14 11:31:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:31:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:31:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-14 11:31:13,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-14 11:31:13,814 INFO L175 Difference]: Start difference. First operand has 551 places, 874 transitions, 21308 flow. Second operand 12 states and 250 transitions. [2024-06-14 11:31:13,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 913 transitions, 23945 flow [2024-06-14 11:31:17,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 913 transitions, 23444 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 11:31:17,879 INFO L231 Difference]: Finished difference. Result has 555 places, 877 transitions, 21897 flow [2024-06-14 11:31:17,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20811, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21897, PETRI_PLACES=555, PETRI_TRANSITIONS=877} [2024-06-14 11:31:17,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-14 11:31:17,879 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 877 transitions, 21897 flow [2024-06-14 11:31:17,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:17,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:17,879 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] [2024-06-14 11:31:17,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 11:31:17,880 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:17,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash -853461817, now seen corresponding path program 11 times [2024-06-14 11:31:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434050852] [2024-06-14 11:31:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:17,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:18,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:18,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434050852] [2024-06-14 11:31:18,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434050852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:18,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:18,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:18,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745346962] [2024-06-14 11:31:18,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:18,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:18,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:18,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:18,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:18,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:18,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 877 transitions, 21897 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:18,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:18,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:18,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:19,567 INFO L124 PetriNetUnfolderBase]: 3286/5521 cut-off events. [2024-06-14 11:31:19,567 INFO L125 PetriNetUnfolderBase]: For 656537/656537 co-relation queries the response was YES. [2024-06-14 11:31:19,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52744 conditions, 5521 events. 3286/5521 cut-off events. For 656537/656537 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 36688 event pairs, 597 based on Foata normal form. 1/5500 useless extension candidates. Maximal degree in co-relation 52492. Up to 3909 conditions per place. [2024-06-14 11:31:19,678 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 396 selfloop transitions, 530 changer transitions 0/932 dead transitions. [2024-06-14 11:31:19,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 932 transitions, 25260 flow [2024-06-14 11:31:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:31:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:31:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-06-14 11:31:19,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-14 11:31:19,679 INFO L175 Difference]: Start difference. First operand has 555 places, 877 transitions, 21897 flow. Second operand 14 states and 290 transitions. [2024-06-14 11:31:19,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 932 transitions, 25260 flow [2024-06-14 11:31:23,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 932 transitions, 24376 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 11:31:23,907 INFO L231 Difference]: Finished difference. Result has 560 places, 892 transitions, 22365 flow [2024-06-14 11:31:23,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21030, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22365, PETRI_PLACES=560, PETRI_TRANSITIONS=892} [2024-06-14 11:31:23,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 518 predicate places. [2024-06-14 11:31:23,908 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 892 transitions, 22365 flow [2024-06-14 11:31:23,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:23,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:23,908 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] [2024-06-14 11:31:23,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 11:31:23,909 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:23,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash -582504017, now seen corresponding path program 12 times [2024-06-14 11:31:23,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:23,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237812172] [2024-06-14 11:31:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:23,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237812172] [2024-06-14 11:31:24,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237812172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:24,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:24,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332036337] [2024-06-14 11:31:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:24,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:24,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 892 transitions, 22365 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:24,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:24,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:24,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:25,770 INFO L124 PetriNetUnfolderBase]: 3283/5517 cut-off events. [2024-06-14 11:31:25,770 INFO L125 PetriNetUnfolderBase]: For 662071/662071 co-relation queries the response was YES. [2024-06-14 11:31:25,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52792 conditions, 5517 events. 3283/5517 cut-off events. For 662071/662071 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 36643 event pairs, 597 based on Foata normal form. 1/5496 useless extension candidates. Maximal degree in co-relation 52539. Up to 3906 conditions per place. [2024-06-14 11:31:25,867 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 395 selfloop transitions, 532 changer transitions 0/933 dead transitions. [2024-06-14 11:31:25,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 933 transitions, 25454 flow [2024-06-14 11:31:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:31:25,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:31:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 304 transitions. [2024-06-14 11:31:25,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2024-06-14 11:31:25,868 INFO L175 Difference]: Start difference. First operand has 560 places, 892 transitions, 22365 flow. Second operand 15 states and 304 transitions. [2024-06-14 11:31:25,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 933 transitions, 25454 flow [2024-06-14 11:31:30,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 933 transitions, 24526 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 11:31:30,228 INFO L231 Difference]: Finished difference. Result has 566 places, 892 transitions, 22507 flow [2024-06-14 11:31:30,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21437, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=532, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22507, PETRI_PLACES=566, PETRI_TRANSITIONS=892} [2024-06-14 11:31:30,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 524 predicate places. [2024-06-14 11:31:30,229 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 892 transitions, 22507 flow [2024-06-14 11:31:30,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:30,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:30,229 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] [2024-06-14 11:31:30,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 11:31:30,229 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:30,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1154307443, now seen corresponding path program 13 times [2024-06-14 11:31:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402213248] [2024-06-14 11:31:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:30,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:30,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402213248] [2024-06-14 11:31:30,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402213248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:30,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:30,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468986103] [2024-06-14 11:31:30,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:30,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:30,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:30,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:30,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:30,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 892 transitions, 22507 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:30,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:30,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:30,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:32,017 INFO L124 PetriNetUnfolderBase]: 3280/5513 cut-off events. [2024-06-14 11:31:32,017 INFO L125 PetriNetUnfolderBase]: For 667292/667292 co-relation queries the response was YES. [2024-06-14 11:31:32,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52777 conditions, 5513 events. 3280/5513 cut-off events. For 667292/667292 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 36597 event pairs, 597 based on Foata normal form. 1/5492 useless extension candidates. Maximal degree in co-relation 52524. Up to 3903 conditions per place. [2024-06-14 11:31:32,122 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 396 selfloop transitions, 530 changer transitions 0/932 dead transitions. [2024-06-14 11:31:32,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 932 transitions, 25600 flow [2024-06-14 11:31:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:31:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:31:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-06-14 11:31:32,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-14 11:31:32,123 INFO L175 Difference]: Start difference. First operand has 566 places, 892 transitions, 22507 flow. Second operand 14 states and 290 transitions. [2024-06-14 11:31:32,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 932 transitions, 25600 flow [2024-06-14 11:31:36,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 932 transitions, 24716 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:31:36,667 INFO L231 Difference]: Finished difference. Result has 571 places, 892 transitions, 22689 flow [2024-06-14 11:31:36,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21623, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22689, PETRI_PLACES=571, PETRI_TRANSITIONS=892} [2024-06-14 11:31:36,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 529 predicate places. [2024-06-14 11:31:36,668 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 892 transitions, 22689 flow [2024-06-14 11:31:36,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:36,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:36,668 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] [2024-06-14 11:31:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 11:31:36,668 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:36,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -582671417, now seen corresponding path program 14 times [2024-06-14 11:31:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27543706] [2024-06-14 11:31:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:36,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27543706] [2024-06-14 11:31:36,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27543706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:36,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:36,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773024491] [2024-06-14 11:31:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:36,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:36,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 892 transitions, 22689 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:36,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:36,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:36,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:38,450 INFO L124 PetriNetUnfolderBase]: 3277/5506 cut-off events. [2024-06-14 11:31:38,450 INFO L125 PetriNetUnfolderBase]: For 675182/675182 co-relation queries the response was YES. [2024-06-14 11:31:38,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52782 conditions, 5506 events. 3277/5506 cut-off events. For 675182/675182 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 36555 event pairs, 602 based on Foata normal form. 1/5485 useless extension candidates. Maximal degree in co-relation 52527. Up to 3900 conditions per place. [2024-06-14 11:31:38,562 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 397 selfloop transitions, 531 changer transitions 0/934 dead transitions. [2024-06-14 11:31:38,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 934 transitions, 25570 flow [2024-06-14 11:31:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-14 11:31:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-14 11:31:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 331 transitions. [2024-06-14 11:31:38,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748923959827834 [2024-06-14 11:31:38,562 INFO L175 Difference]: Start difference. First operand has 571 places, 892 transitions, 22689 flow. Second operand 17 states and 331 transitions. [2024-06-14 11:31:38,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 934 transitions, 25570 flow [2024-06-14 11:31:43,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 934 transitions, 24496 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-14 11:31:43,126 INFO L231 Difference]: Finished difference. Result has 575 places, 892 transitions, 22683 flow [2024-06-14 11:31:43,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21615, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=22683, PETRI_PLACES=575, PETRI_TRANSITIONS=892} [2024-06-14 11:31:43,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 533 predicate places. [2024-06-14 11:31:43,127 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 892 transitions, 22683 flow [2024-06-14 11:31:43,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:43,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:43,127 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] [2024-06-14 11:31:43,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 11:31:43,127 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:43,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:43,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1154664563, now seen corresponding path program 15 times [2024-06-14 11:31:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:43,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130127760] [2024-06-14 11:31:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:43,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:43,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130127760] [2024-06-14 11:31:43,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130127760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:43,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:43,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:43,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582164528] [2024-06-14 11:31:43,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:43,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:43,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:43,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:43,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:43,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:43,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 892 transitions, 22683 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:43,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:43,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:43,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:44,821 INFO L124 PetriNetUnfolderBase]: 3274/5502 cut-off events. [2024-06-14 11:31:44,821 INFO L125 PetriNetUnfolderBase]: For 677499/677499 co-relation queries the response was YES. [2024-06-14 11:31:44,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52723 conditions, 5502 events. 3274/5502 cut-off events. For 677499/677499 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 36556 event pairs, 602 based on Foata normal form. 1/5481 useless extension candidates. Maximal degree in co-relation 52467. Up to 3897 conditions per place. [2024-06-14 11:31:44,922 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 394 selfloop transitions, 531 changer transitions 0/931 dead transitions. [2024-06-14 11:31:44,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 931 transitions, 25328 flow [2024-06-14 11:31:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:31:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:31:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-14 11:31:44,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-14 11:31:44,923 INFO L175 Difference]: Start difference. First operand has 575 places, 892 transitions, 22683 flow. Second operand 15 states and 298 transitions. [2024-06-14 11:31:44,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 931 transitions, 25328 flow [2024-06-14 11:31:49,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 931 transitions, 23634 flow, removed 4 selfloop flow, removed 20 redundant places. [2024-06-14 11:31:49,388 INFO L231 Difference]: Finished difference. Result has 570 places, 892 transitions, 22057 flow [2024-06-14 11:31:49,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20989, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22057, PETRI_PLACES=570, PETRI_TRANSITIONS=892} [2024-06-14 11:31:49,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 528 predicate places. [2024-06-14 11:31:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 892 transitions, 22057 flow [2024-06-14 11:31:49,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:49,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:49,389 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] [2024-06-14 11:31:49,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 11:31:49,389 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:49,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash -805930622, now seen corresponding path program 2 times [2024-06-14 11:31:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:49,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717902506] [2024-06-14 11:31:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:49,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:49,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:49,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717902506] [2024-06-14 11:31:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717902506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:49,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:49,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:31:49,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370946123] [2024-06-14 11:31:49,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:49,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:31:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:31:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:31:49,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:49,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 892 transitions, 22057 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:49,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:49,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:49,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:51,255 INFO L124 PetriNetUnfolderBase]: 3310/5569 cut-off events. [2024-06-14 11:31:51,255 INFO L125 PetriNetUnfolderBase]: For 734304/734304 co-relation queries the response was YES. [2024-06-14 11:31:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53118 conditions, 5569 events. 3310/5569 cut-off events. For 734304/734304 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 36990 event pairs, 586 based on Foata normal form. 10/5576 useless extension candidates. Maximal degree in co-relation 52862. Up to 4796 conditions per place. [2024-06-14 11:31:51,353 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 804 selfloop transitions, 105 changer transitions 0/915 dead transitions. [2024-06-14 11:31:51,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 915 transitions, 24023 flow [2024-06-14 11:31:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:31:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:31:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 11:31:51,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-14 11:31:51,354 INFO L175 Difference]: Start difference. First operand has 570 places, 892 transitions, 22057 flow. Second operand 11 states and 225 transitions. [2024-06-14 11:31:51,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 915 transitions, 24023 flow [2024-06-14 11:31:55,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 915 transitions, 22989 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-14 11:31:55,901 INFO L231 Difference]: Finished difference. Result has 568 places, 894 transitions, 21309 flow [2024-06-14 11:31:55,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21023, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21309, PETRI_PLACES=568, PETRI_TRANSITIONS=894} [2024-06-14 11:31:55,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 526 predicate places. [2024-06-14 11:31:55,902 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 894 transitions, 21309 flow [2024-06-14 11:31:55,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:55,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:55,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:55,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 11:31:55,902 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:55,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1801837924, now seen corresponding path program 3 times [2024-06-14 11:31:55,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:55,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365010313] [2024-06-14 11:31:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:55,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:56,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365010313] [2024-06-14 11:31:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365010313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:56,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:56,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:31:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326816111] [2024-06-14 11:31:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:31:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:31:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:31:56,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:31:56,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 894 transitions, 21309 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:56,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:56,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:31:56,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:57,813 INFO L124 PetriNetUnfolderBase]: 3598/6029 cut-off events. [2024-06-14 11:31:57,814 INFO L125 PetriNetUnfolderBase]: For 1045586/1045586 co-relation queries the response was YES. [2024-06-14 11:31:57,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60680 conditions, 6029 events. 3598/6029 cut-off events. For 1045586/1045586 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40263 event pairs, 680 based on Foata normal form. 10/6036 useless extension candidates. Maximal degree in co-relation 60423. Up to 4632 conditions per place. [2024-06-14 11:31:57,930 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 810 selfloop transitions, 111 changer transitions 0/927 dead transitions. [2024-06-14 11:31:57,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 927 transitions, 23681 flow [2024-06-14 11:31:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:31:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:31:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 11:31:57,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:31:57,931 INFO L175 Difference]: Start difference. First operand has 568 places, 894 transitions, 21309 flow. Second operand 11 states and 231 transitions. [2024-06-14 11:31:57,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 927 transitions, 23681 flow [2024-06-14 11:32:04,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 927 transitions, 23456 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 11:32:04,254 INFO L231 Difference]: Finished difference. Result has 573 places, 898 transitions, 21475 flow [2024-06-14 11:32:04,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21090, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21475, PETRI_PLACES=573, PETRI_TRANSITIONS=898} [2024-06-14 11:32:04,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 531 predicate places. [2024-06-14 11:32:04,255 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 898 transitions, 21475 flow [2024-06-14 11:32:04,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:04,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:04,255 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] [2024-06-14 11:32:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 11:32:04,255 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:04,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1220203622, now seen corresponding path program 4 times [2024-06-14 11:32:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:04,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781650856] [2024-06-14 11:32:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:04,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:04,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781650856] [2024-06-14 11:32:04,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781650856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:04,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:04,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:32:04,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449653349] [2024-06-14 11:32:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:04,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:32:04,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:32:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:32:04,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:32:04,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 898 transitions, 21475 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:04,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:04,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:32:04,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:06,132 INFO L124 PetriNetUnfolderBase]: 3575/5994 cut-off events. [2024-06-14 11:32:06,132 INFO L125 PetriNetUnfolderBase]: For 983017/983017 co-relation queries the response was YES. [2024-06-14 11:32:06,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59151 conditions, 5994 events. 3575/5994 cut-off events. For 983017/983017 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40082 event pairs, 703 based on Foata normal form. 10/6001 useless extension candidates. Maximal degree in co-relation 58892. Up to 5219 conditions per place. [2024-06-14 11:32:06,245 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 807 selfloop transitions, 108 changer transitions 0/921 dead transitions. [2024-06-14 11:32:06,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 921 transitions, 23460 flow [2024-06-14 11:32:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:32:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:32:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 11:32:06,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-14 11:32:06,246 INFO L175 Difference]: Start difference. First operand has 573 places, 898 transitions, 21475 flow. Second operand 11 states and 225 transitions. [2024-06-14 11:32:06,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 921 transitions, 23460 flow [2024-06-14 11:32:11,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 921 transitions, 23272 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 11:32:11,832 INFO L231 Difference]: Finished difference. Result has 577 places, 900 transitions, 21584 flow [2024-06-14 11:32:11,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21295, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21584, PETRI_PLACES=577, PETRI_TRANSITIONS=900} [2024-06-14 11:32:11,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 535 predicate places. [2024-06-14 11:32:11,832 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 900 transitions, 21584 flow [2024-06-14 11:32:11,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:11,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:11,833 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] [2024-06-14 11:32:11,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 11:32:11,833 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:11,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1220190881, now seen corresponding path program 16 times [2024-06-14 11:32:11,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:11,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621105467] [2024-06-14 11:32:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:11,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:11,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621105467] [2024-06-14 11:32:11,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621105467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:11,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004687993] [2024-06-14 11:32:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:32:12,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 900 transitions, 21584 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:12,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:12,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:32:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:13,762 INFO L124 PetriNetUnfolderBase]: 3580/6003 cut-off events. [2024-06-14 11:32:13,762 INFO L125 PetriNetUnfolderBase]: For 916920/916920 co-relation queries the response was YES. [2024-06-14 11:32:13,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59012 conditions, 6003 events. 3580/6003 cut-off events. For 916920/916920 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 40161 event pairs, 703 based on Foata normal form. 1/6001 useless extension candidates. Maximal degree in co-relation 58751. Up to 5233 conditions per place. [2024-06-14 11:32:13,880 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 792 selfloop transitions, 124 changer transitions 0/922 dead transitions. [2024-06-14 11:32:13,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 922 transitions, 23779 flow [2024-06-14 11:32:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:32:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:32:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-14 11:32:13,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-14 11:32:13,881 INFO L175 Difference]: Start difference. First operand has 577 places, 900 transitions, 21584 flow. Second operand 12 states and 238 transitions. [2024-06-14 11:32:13,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 922 transitions, 23779 flow [2024-06-14 11:32:20,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 922 transitions, 23527 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-14 11:32:20,633 INFO L231 Difference]: Finished difference. Result has 580 places, 903 transitions, 21665 flow [2024-06-14 11:32:20,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21334, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21665, PETRI_PLACES=580, PETRI_TRANSITIONS=903} [2024-06-14 11:32:20,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 538 predicate places. [2024-06-14 11:32:20,633 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 903 transitions, 21665 flow [2024-06-14 11:32:20,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:20,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:20,633 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] [2024-06-14 11:32:20,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 11:32:20,634 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:20,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash 768592965, now seen corresponding path program 17 times [2024-06-14 11:32:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239862371] [2024-06-14 11:32:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:20,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:20,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:20,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239862371] [2024-06-14 11:32:20,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239862371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:20,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:20,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:20,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158333657] [2024-06-14 11:32:20,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:20,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:20,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:20,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:32:20,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 903 transitions, 21665 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:20,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:20,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:32:20,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:22,858 INFO L124 PetriNetUnfolderBase]: 3593/6025 cut-off events. [2024-06-14 11:32:22,858 INFO L125 PetriNetUnfolderBase]: For 920596/920596 co-relation queries the response was YES. [2024-06-14 11:32:22,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58961 conditions, 6025 events. 3593/6025 cut-off events. For 920596/920596 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40389 event pairs, 703 based on Foata normal form. 1/6023 useless extension candidates. Maximal degree in co-relation 58699. Up to 5248 conditions per place. [2024-06-14 11:32:22,962 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 796 selfloop transitions, 130 changer transitions 0/932 dead transitions. [2024-06-14 11:32:22,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 932 transitions, 24445 flow [2024-06-14 11:32:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:32:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:32:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 272 transitions. [2024-06-14 11:32:22,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-14 11:32:22,963 INFO L175 Difference]: Start difference. First operand has 580 places, 903 transitions, 21665 flow. Second operand 14 states and 272 transitions. [2024-06-14 11:32:22,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 932 transitions, 24445 flow [2024-06-14 11:32:29,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 932 transitions, 24177 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:32:29,977 INFO L231 Difference]: Finished difference. Result has 584 places, 909 transitions, 21829 flow [2024-06-14 11:32:29,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21409, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21829, PETRI_PLACES=584, PETRI_TRANSITIONS=909} [2024-06-14 11:32:29,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-14 11:32:29,977 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 909 transitions, 21829 flow [2024-06-14 11:32:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:29,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:29,978 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] [2024-06-14 11:32:29,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 11:32:29,978 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:29,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash 996840075, now seen corresponding path program 18 times [2024-06-14 11:32:29,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:29,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092135039] [2024-06-14 11:32:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:29,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:30,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092135039] [2024-06-14 11:32:30,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092135039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:30,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:30,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626565835] [2024-06-14 11:32:30,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:30,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:30,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:30,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:30,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:30,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:32:30,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 909 transitions, 21829 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:30,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:30,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:32:30,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:32,190 INFO L124 PetriNetUnfolderBase]: 3590/6029 cut-off events. [2024-06-14 11:32:32,190 INFO L125 PetriNetUnfolderBase]: For 926801/926801 co-relation queries the response was YES. [2024-06-14 11:32:32,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58932 conditions, 6029 events. 3590/6029 cut-off events. For 926801/926801 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40532 event pairs, 707 based on Foata normal form. 1/6027 useless extension candidates. Maximal degree in co-relation 58669. Up to 5245 conditions per place. [2024-06-14 11:32:32,299 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 796 selfloop transitions, 126 changer transitions 0/928 dead transitions. [2024-06-14 11:32:32,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 928 transitions, 23961 flow [2024-06-14 11:32:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:32:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:32:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-14 11:32:32,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-14 11:32:32,300 INFO L175 Difference]: Start difference. First operand has 584 places, 909 transitions, 21829 flow. Second operand 12 states and 238 transitions. [2024-06-14 11:32:32,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 928 transitions, 23961 flow [2024-06-14 11:32:38,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 928 transitions, 23744 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:32:38,403 INFO L231 Difference]: Finished difference. Result has 587 places, 909 transitions, 21870 flow [2024-06-14 11:32:38,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21612, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21870, PETRI_PLACES=587, PETRI_TRANSITIONS=909} [2024-06-14 11:32:38,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 545 predicate places. [2024-06-14 11:32:38,404 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 909 transitions, 21870 flow [2024-06-14 11:32:38,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:38,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:38,404 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] [2024-06-14 11:32:38,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 11:32:38,404 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:38,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash 996845655, now seen corresponding path program 19 times [2024-06-14 11:32:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:38,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784957247] [2024-06-14 11:32:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:38,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784957247] [2024-06-14 11:32:38,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784957247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:38,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:38,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:32:38,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498280437] [2024-06-14 11:32:38,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:38,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:32:38,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:32:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:32:38,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:32:38,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 909 transitions, 21870 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:38,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:38,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:32:38,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:40,538 INFO L124 PetriNetUnfolderBase]: 3595/6030 cut-off events. [2024-06-14 11:32:40,539 INFO L125 PetriNetUnfolderBase]: For 942165/942165 co-relation queries the response was YES. [2024-06-14 11:32:40,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59117 conditions, 6030 events. 3595/6030 cut-off events. For 942165/942165 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 40435 event pairs, 703 based on Foata normal form. 1/6028 useless extension candidates. Maximal degree in co-relation 58853. Up to 5251 conditions per place. [2024-06-14 11:32:40,642 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 790 selfloop transitions, 134 changer transitions 0/930 dead transitions. [2024-06-14 11:32:40,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 930 transitions, 24092 flow [2024-06-14 11:32:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:32:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:32:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 11:32:40,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49223946784922396 [2024-06-14 11:32:40,643 INFO L175 Difference]: Start difference. First operand has 587 places, 909 transitions, 21870 flow. Second operand 11 states and 222 transitions. [2024-06-14 11:32:40,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 930 transitions, 24092 flow [2024-06-14 11:32:46,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 930 transitions, 23798 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 11:32:46,317 INFO L231 Difference]: Finished difference. Result has 587 places, 912 transitions, 21936 flow [2024-06-14 11:32:46,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21582, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21936, PETRI_PLACES=587, PETRI_TRANSITIONS=912} [2024-06-14 11:32:46,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 545 predicate places. [2024-06-14 11:32:46,318 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 912 transitions, 21936 flow [2024-06-14 11:32:46,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:46,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:46,318 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] [2024-06-14 11:32:46,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 11:32:46,318 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:46,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1220012321, now seen corresponding path program 20 times [2024-06-14 11:32:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:46,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999726512] [2024-06-14 11:32:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:46,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:46,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:46,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999726512] [2024-06-14 11:32:46,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999726512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:46,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:46,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:32:46,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361850615] [2024-06-14 11:32:46,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:46,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:32:46,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:46,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:32:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:32:46,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:32:46,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 912 transitions, 21936 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:46,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:46,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:32:46,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:48,388 INFO L124 PetriNetUnfolderBase]: 3600/6055 cut-off events. [2024-06-14 11:32:48,388 INFO L125 PetriNetUnfolderBase]: For 956938/956938 co-relation queries the response was YES. [2024-06-14 11:32:48,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59312 conditions, 6055 events. 3600/6055 cut-off events. For 956938/956938 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 40747 event pairs, 715 based on Foata normal form. 1/6053 useless extension candidates. Maximal degree in co-relation 59047. Up to 5257 conditions per place. [2024-06-14 11:32:48,594 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 793 selfloop transitions, 135 changer transitions 0/934 dead transitions. [2024-06-14 11:32:48,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 934 transitions, 24410 flow [2024-06-14 11:32:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:32:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:32:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 11:32:48,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49223946784922396 [2024-06-14 11:32:48,595 INFO L175 Difference]: Start difference. First operand has 587 places, 912 transitions, 21936 flow. Second operand 11 states and 222 transitions. [2024-06-14 11:32:48,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 934 transitions, 24410 flow [2024-06-14 11:32:54,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 934 transitions, 24189 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:32:54,508 INFO L231 Difference]: Finished difference. Result has 590 places, 915 transitions, 22077 flow [2024-06-14 11:32:54,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21718, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22077, PETRI_PLACES=590, PETRI_TRANSITIONS=915} [2024-06-14 11:32:54,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 548 predicate places. [2024-06-14 11:32:54,508 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 915 transitions, 22077 flow [2024-06-14 11:32:54,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:54,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:54,509 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] [2024-06-14 11:32:54,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 11:32:54,509 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:54,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:54,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1220023481, now seen corresponding path program 21 times [2024-06-14 11:32:54,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:54,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321558402] [2024-06-14 11:32:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:54,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:54,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:54,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321558402] [2024-06-14 11:32:54,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321558402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:54,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:32:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903207200] [2024-06-14 11:32:54,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:54,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:32:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:32:54,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:32:54,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:32:54,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 915 transitions, 22077 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:54,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:54,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:32:54,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:56,573 INFO L124 PetriNetUnfolderBase]: 3597/6039 cut-off events. [2024-06-14 11:32:56,573 INFO L125 PetriNetUnfolderBase]: For 963640/963640 co-relation queries the response was YES. [2024-06-14 11:32:56,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59283 conditions, 6039 events. 3597/6039 cut-off events. For 963640/963640 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 40535 event pairs, 705 based on Foata normal form. 1/6037 useless extension candidates. Maximal degree in co-relation 59017. Up to 5254 conditions per place. [2024-06-14 11:32:56,682 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 790 selfloop transitions, 137 changer transitions 0/933 dead transitions. [2024-06-14 11:32:56,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 933 transitions, 24223 flow [2024-06-14 11:32:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:32:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:32:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 11:32:56,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49223946784922396 [2024-06-14 11:32:56,682 INFO L175 Difference]: Start difference. First operand has 590 places, 915 transitions, 22077 flow. Second operand 11 states and 222 transitions. [2024-06-14 11:32:56,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 933 transitions, 24223 flow [2024-06-14 11:33:03,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 933 transitions, 23908 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:33:03,929 INFO L231 Difference]: Finished difference. Result has 592 places, 915 transitions, 22042 flow [2024-06-14 11:33:03,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21762, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22042, PETRI_PLACES=592, PETRI_TRANSITIONS=915} [2024-06-14 11:33:03,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 550 predicate places. [2024-06-14 11:33:03,930 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 915 transitions, 22042 flow [2024-06-14 11:33:03,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:03,930 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] [2024-06-14 11:33:03,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 11:33:03,930 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:03,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1219839341, now seen corresponding path program 22 times [2024-06-14 11:33:03,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:03,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442871522] [2024-06-14 11:33:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:03,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:04,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:04,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442871522] [2024-06-14 11:33:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442871522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:33:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489298901] [2024-06-14 11:33:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:33:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:33:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:33:04,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-14 11:33:04,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 915 transitions, 22042 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:04,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:04,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-14 11:33:04,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:06,170 INFO L124 PetriNetUnfolderBase]: 3594/6031 cut-off events. [2024-06-14 11:33:06,170 INFO L125 PetriNetUnfolderBase]: For 967975/967975 co-relation queries the response was YES. [2024-06-14 11:33:06,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59220 conditions, 6031 events. 3594/6031 cut-off events. For 967975/967975 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 40445 event pairs, 703 based on Foata normal form. 1/6029 useless extension candidates. Maximal degree in co-relation 58953. Up to 5251 conditions per place. [2024-06-14 11:33:06,279 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 792 selfloop transitions, 135 changer transitions 0/933 dead transitions. [2024-06-14 11:33:06,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 933 transitions, 23946 flow [2024-06-14 11:33:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:33:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:33:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-14 11:33:06,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-14 11:33:06,280 INFO L175 Difference]: Start difference. First operand has 592 places, 915 transitions, 22042 flow. Second operand 12 states and 237 transitions. [2024-06-14 11:33:06,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 933 transitions, 23946 flow [2024-06-14 11:33:12,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 933 transitions, 23603 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:33:12,987 INFO L231 Difference]: Finished difference. Result has 594 places, 915 transitions, 21975 flow [2024-06-14 11:33:12,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21699, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21975, PETRI_PLACES=594, PETRI_TRANSITIONS=915} [2024-06-14 11:33:12,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 552 predicate places. [2024-06-14 11:33:12,988 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 915 transitions, 21975 flow [2024-06-14 11:33:12,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:12,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:12,988 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] [2024-06-14 11:33:12,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 11:33:12,989 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:12,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1617502539, now seen corresponding path program 23 times [2024-06-14 11:33:12,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:12,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568730082] [2024-06-14 11:33:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:12,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:13,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568730082] [2024-06-14 11:33:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568730082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:13,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890165206] [2024-06-14 11:33:13,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:13,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:13,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:13,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:13,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 915 transitions, 21975 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) [2024-06-14 11:33:13,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:13,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:13,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:15,042 INFO L124 PetriNetUnfolderBase]: 3596/6034 cut-off events. [2024-06-14 11:33:15,042 INFO L125 PetriNetUnfolderBase]: For 982372/982372 co-relation queries the response was YES. [2024-06-14 11:33:15,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59210 conditions, 6034 events. 3596/6034 cut-off events. For 982372/982372 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 40527 event pairs, 700 based on Foata normal form. 2/6030 useless extension candidates. Maximal degree in co-relation 58942. Up to 4996 conditions per place. [2024-06-14 11:33:15,149 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 647 selfloop transitions, 289 changer transitions 0/942 dead transitions. [2024-06-14 11:33:15,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 942 transitions, 24408 flow [2024-06-14 11:33:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:33:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:33:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 11:33:15,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 11:33:15,150 INFO L175 Difference]: Start difference. First operand has 594 places, 915 transitions, 21975 flow. Second operand 8 states and 183 transitions. [2024-06-14 11:33:15,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 942 transitions, 24408 flow [2024-06-14 11:33:22,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 942 transitions, 24130 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 11:33:22,434 INFO L231 Difference]: Finished difference. Result has 592 places, 920 transitions, 22471 flow [2024-06-14 11:33:22,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21697, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22471, PETRI_PLACES=592, PETRI_TRANSITIONS=920} [2024-06-14 11:33:22,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 550 predicate places. [2024-06-14 11:33:22,434 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 920 transitions, 22471 flow [2024-06-14 11:33:22,435 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) [2024-06-14 11:33:22,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:22,435 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] [2024-06-14 11:33:22,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 11:33:22,435 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:22,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash -679705429, now seen corresponding path program 24 times [2024-06-14 11:33:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:22,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860183523] [2024-06-14 11:33:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:22,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860183523] [2024-06-14 11:33:22,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860183523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:22,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:22,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:33:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19689792] [2024-06-14 11:33:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:22,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:33:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:33:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:33:22,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:22,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 920 transitions, 22471 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) [2024-06-14 11:33:22,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:22,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:22,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:24,600 INFO L124 PetriNetUnfolderBase]: 3606/6048 cut-off events. [2024-06-14 11:33:24,600 INFO L125 PetriNetUnfolderBase]: For 1000462/1000462 co-relation queries the response was YES. [2024-06-14 11:33:24,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59945 conditions, 6048 events. 3606/6048 cut-off events. For 1000462/1000462 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 40554 event pairs, 698 based on Foata normal form. 2/6044 useless extension candidates. Maximal degree in co-relation 59676. Up to 5008 conditions per place. [2024-06-14 11:33:24,706 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 648 selfloop transitions, 295 changer transitions 0/949 dead transitions. [2024-06-14 11:33:24,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 949 transitions, 24950 flow [2024-06-14 11:33:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:33:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:33:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 11:33:24,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 11:33:24,707 INFO L175 Difference]: Start difference. First operand has 592 places, 920 transitions, 22471 flow. Second operand 9 states and 204 transitions. [2024-06-14 11:33:24,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 949 transitions, 24950 flow [2024-06-14 11:33:32,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 949 transitions, 24313 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:32,128 INFO L231 Difference]: Finished difference. Result has 595 places, 928 transitions, 22748 flow [2024-06-14 11:33:32,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21848, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22748, PETRI_PLACES=595, PETRI_TRANSITIONS=928} [2024-06-14 11:33:32,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 553 predicate places. [2024-06-14 11:33:32,128 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 928 transitions, 22748 flow [2024-06-14 11:33:32,129 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) [2024-06-14 11:33:32,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:32,129 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] [2024-06-14 11:33:32,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 11:33:32,129 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:32,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash -679699849, now seen corresponding path program 25 times [2024-06-14 11:33:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783901965] [2024-06-14 11:33:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:32,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:32,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783901965] [2024-06-14 11:33:32,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783901965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:32,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:32,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:33:32,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638855604] [2024-06-14 11:33:32,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:32,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:33:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:33:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:33:32,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:32,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 928 transitions, 22748 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) [2024-06-14 11:33:32,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:32,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:32,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:34,156 INFO L124 PetriNetUnfolderBase]: 3600/6040 cut-off events. [2024-06-14 11:33:34,157 INFO L125 PetriNetUnfolderBase]: For 984104/984104 co-relation queries the response was YES. [2024-06-14 11:33:34,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59716 conditions, 6040 events. 3600/6040 cut-off events. For 984104/984104 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 40521 event pairs, 698 based on Foata normal form. 2/6036 useless extension candidates. Maximal degree in co-relation 59446. Up to 5002 conditions per place. [2024-06-14 11:33:34,375 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 642 selfloop transitions, 302 changer transitions 0/950 dead transitions. [2024-06-14 11:33:34,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 950 transitions, 24751 flow [2024-06-14 11:33:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:33:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:33:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 11:33:34,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 11:33:34,376 INFO L175 Difference]: Start difference. First operand has 595 places, 928 transitions, 22748 flow. Second operand 11 states and 239 transitions. [2024-06-14 11:33:34,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 950 transitions, 24751 flow [2024-06-14 11:33:42,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 950 transitions, 24016 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:42,289 INFO L231 Difference]: Finished difference. Result has 598 places, 928 transitions, 22647 flow [2024-06-14 11:33:42,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22013, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22647, PETRI_PLACES=598, PETRI_TRANSITIONS=928} [2024-06-14 11:33:42,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 556 predicate places. [2024-06-14 11:33:42,289 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 928 transitions, 22647 flow [2024-06-14 11:33:42,289 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) [2024-06-14 11:33:42,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:42,289 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] [2024-06-14 11:33:42,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 11:33:42,289 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:42,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1979101687, now seen corresponding path program 26 times [2024-06-14 11:33:42,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:42,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560860261] [2024-06-14 11:33:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:42,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560860261] [2024-06-14 11:33:42,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560860261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:42,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:42,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:33:42,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770144520] [2024-06-14 11:33:42,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:42,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:33:42,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:33:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:33:42,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:42,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 928 transitions, 22647 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) [2024-06-14 11:33:42,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:42,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:42,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:44,404 INFO L124 PetriNetUnfolderBase]: 3642/6134 cut-off events. [2024-06-14 11:33:44,404 INFO L125 PetriNetUnfolderBase]: For 1023822/1023831 co-relation queries the response was YES. [2024-06-14 11:33:44,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60795 conditions, 6134 events. 3642/6134 cut-off events. For 1023822/1023831 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 41511 event pairs, 737 based on Foata normal form. 8/6127 useless extension candidates. Maximal degree in co-relation 60525. Up to 4453 conditions per place. [2024-06-14 11:33:44,528 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 641 changer transitions 0/972 dead transitions. [2024-06-14 11:33:44,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 972 transitions, 25696 flow [2024-06-14 11:33:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:33:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:33:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 11:33:44,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 11:33:44,529 INFO L175 Difference]: Start difference. First operand has 598 places, 928 transitions, 22647 flow. Second operand 10 states and 214 transitions. [2024-06-14 11:33:44,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 972 transitions, 25696 flow [2024-06-14 11:33:52,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 972 transitions, 25039 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 11:33:52,455 INFO L231 Difference]: Finished difference. Result has 597 places, 946 transitions, 23738 flow [2024-06-14 11:33:52,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21994, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23738, PETRI_PLACES=597, PETRI_TRANSITIONS=946} [2024-06-14 11:33:52,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 555 predicate places. [2024-06-14 11:33:52,456 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 946 transitions, 23738 flow [2024-06-14 11:33:52,456 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) [2024-06-14 11:33:52,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:52,456 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] [2024-06-14 11:33:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 11:33:52,456 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:52,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1521419149, now seen corresponding path program 27 times [2024-06-14 11:33:52,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:52,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088652375] [2024-06-14 11:33:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:52,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:52,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088652375] [2024-06-14 11:33:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088652375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:52,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:52,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:33:52,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317798036] [2024-06-14 11:33:52,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:33:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:52,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:33:52,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:33:52,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:52,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 946 transitions, 23738 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) [2024-06-14 11:33:52,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:52,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:52,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:54,536 INFO L124 PetriNetUnfolderBase]: 3641/6097 cut-off events. [2024-06-14 11:33:54,537 INFO L125 PetriNetUnfolderBase]: For 1018700/1018700 co-relation queries the response was YES. [2024-06-14 11:33:54,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61274 conditions, 6097 events. 3641/6097 cut-off events. For 1018700/1018700 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 40949 event pairs, 743 based on Foata normal form. 3/6075 useless extension candidates. Maximal degree in co-relation 61004. Up to 4453 conditions per place. [2024-06-14 11:33:54,646 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 637 changer transitions 0/980 dead transitions. [2024-06-14 11:33:54,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 980 transitions, 26452 flow [2024-06-14 11:33:54,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:33:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:33:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-14 11:33:54,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:33:54,647 INFO L175 Difference]: Start difference. First operand has 597 places, 946 transitions, 23738 flow. Second operand 12 states and 252 transitions. [2024-06-14 11:33:54,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 980 transitions, 26452 flow [2024-06-14 11:34:01,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 980 transitions, 24976 flow, removed 104 selfloop flow, removed 8 redundant places. [2024-06-14 11:34:01,081 INFO L231 Difference]: Finished difference. Result has 601 places, 949 transitions, 23637 flow [2024-06-14 11:34:01,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22276, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23637, PETRI_PLACES=601, PETRI_TRANSITIONS=949} [2024-06-14 11:34:01,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 559 predicate places. [2024-06-14 11:34:01,082 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 949 transitions, 23637 flow [2024-06-14 11:34:01,082 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) [2024-06-14 11:34:01,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:01,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:01,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 11:34:01,082 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:01,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1029877775, now seen corresponding path program 28 times [2024-06-14 11:34:01,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:01,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068724018] [2024-06-14 11:34:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:01,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068724018] [2024-06-14 11:34:01,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068724018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:01,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617097681] [2024-06-14 11:34:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:01,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:01,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 949 transitions, 23637 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) [2024-06-14 11:34:01,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:01,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:01,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:03,120 INFO L124 PetriNetUnfolderBase]: 3659/6154 cut-off events. [2024-06-14 11:34:03,120 INFO L125 PetriNetUnfolderBase]: For 1017994/1018003 co-relation queries the response was YES. [2024-06-14 11:34:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61436 conditions, 6154 events. 3659/6154 cut-off events. For 1017994/1018003 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 41661 event pairs, 723 based on Foata normal form. 8/6147 useless extension candidates. Maximal degree in co-relation 61166. Up to 4474 conditions per place. [2024-06-14 11:34:03,234 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 347 selfloop transitions, 626 changer transitions 0/979 dead transitions. [2024-06-14 11:34:03,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 979 transitions, 26378 flow [2024-06-14 11:34:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:34:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:34:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 11:34:03,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 11:34:03,235 INFO L175 Difference]: Start difference. First operand has 601 places, 949 transitions, 23637 flow. Second operand 9 states and 197 transitions. [2024-06-14 11:34:03,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 979 transitions, 26378 flow [2024-06-14 11:34:11,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 979 transitions, 24488 flow, removed 96 selfloop flow, removed 12 redundant places. [2024-06-14 11:34:11,616 INFO L231 Difference]: Finished difference. Result has 598 places, 958 transitions, 23179 flow [2024-06-14 11:34:11,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21769, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23179, PETRI_PLACES=598, PETRI_TRANSITIONS=958} [2024-06-14 11:34:11,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 556 predicate places. [2024-06-14 11:34:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 958 transitions, 23179 flow [2024-06-14 11:34:11,616 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) [2024-06-14 11:34:11,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:11,616 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] [2024-06-14 11:34:11,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 11:34:11,616 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:11,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1696907359, now seen corresponding path program 29 times [2024-06-14 11:34:11,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110415871] [2024-06-14 11:34:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:11,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110415871] [2024-06-14 11:34:11,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110415871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:11,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:11,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:11,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142366533] [2024-06-14 11:34:11,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:11,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:11,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:11,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:11,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 958 transitions, 23179 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) [2024-06-14 11:34:11,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:11,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:11,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:13,614 INFO L124 PetriNetUnfolderBase]: 3653/6142 cut-off events. [2024-06-14 11:34:13,614 INFO L125 PetriNetUnfolderBase]: For 998860/998869 co-relation queries the response was YES. [2024-06-14 11:34:13,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60241 conditions, 6142 events. 3653/6142 cut-off events. For 998860/998869 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 41594 event pairs, 721 based on Foata normal form. 8/6135 useless extension candidates. Maximal degree in co-relation 59972. Up to 4468 conditions per place. [2024-06-14 11:34:13,726 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 342 selfloop transitions, 632 changer transitions 0/980 dead transitions. [2024-06-14 11:34:13,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 980 transitions, 25517 flow [2024-06-14 11:34:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:34:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:34:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 11:34:13,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-14 11:34:13,726 INFO L175 Difference]: Start difference. First operand has 598 places, 958 transitions, 23179 flow. Second operand 11 states and 230 transitions. [2024-06-14 11:34:13,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 980 transitions, 25517 flow [2024-06-14 11:34:21,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 980 transitions, 24504 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:21,361 INFO L231 Difference]: Finished difference. Result has 603 places, 958 transitions, 23446 flow [2024-06-14 11:34:21,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22168, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23446, PETRI_PLACES=603, PETRI_TRANSITIONS=958} [2024-06-14 11:34:21,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 561 predicate places. [2024-06-14 11:34:21,361 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 958 transitions, 23446 flow [2024-06-14 11:34:21,361 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) [2024-06-14 11:34:21,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:21,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:21,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 11:34:21,362 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:21,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1525143799, now seen corresponding path program 30 times [2024-06-14 11:34:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:21,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86562533] [2024-06-14 11:34:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:21,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:21,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:21,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86562533] [2024-06-14 11:34:21,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86562533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:21,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:21,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:34:21,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509862253] [2024-06-14 11:34:21,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:21,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:34:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:34:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:34:21,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:21,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 958 transitions, 23446 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) [2024-06-14 11:34:21,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:21,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:21,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:23,514 INFO L124 PetriNetUnfolderBase]: 3679/6152 cut-off events. [2024-06-14 11:34:23,514 INFO L125 PetriNetUnfolderBase]: For 1018365/1018365 co-relation queries the response was YES. [2024-06-14 11:34:23,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60888 conditions, 6152 events. 3679/6152 cut-off events. For 1018365/1018365 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 41350 event pairs, 761 based on Foata normal form. 2/6117 useless extension candidates. Maximal degree in co-relation 60619. Up to 4498 conditions per place. [2024-06-14 11:34:23,627 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 656 changer transitions 0/998 dead transitions. [2024-06-14 11:34:23,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 998 transitions, 26318 flow [2024-06-14 11:34:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:34:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:34:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 265 transitions. [2024-06-14 11:34:23,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971857410881801 [2024-06-14 11:34:23,628 INFO L175 Difference]: Start difference. First operand has 603 places, 958 transitions, 23446 flow. Second operand 13 states and 265 transitions. [2024-06-14 11:34:23,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 998 transitions, 26318 flow [2024-06-14 11:34:30,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 998 transitions, 25185 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 11:34:30,218 INFO L231 Difference]: Finished difference. Result has 606 places, 970 transitions, 23873 flow [2024-06-14 11:34:30,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22329, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=644, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23873, PETRI_PLACES=606, PETRI_TRANSITIONS=970} [2024-06-14 11:34:30,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 564 predicate places. [2024-06-14 11:34:30,218 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 970 transitions, 23873 flow [2024-06-14 11:34:30,218 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) [2024-06-14 11:34:30,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:30,219 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] [2024-06-14 11:34:30,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 11:34:30,219 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:30,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1746365521, now seen corresponding path program 31 times [2024-06-14 11:34:30,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:30,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466898692] [2024-06-14 11:34:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:30,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:30,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:30,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466898692] [2024-06-14 11:34:30,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466898692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:30,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:30,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:34:30,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853217517] [2024-06-14 11:34:30,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:30,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:34:30,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:34:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:34:30,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:30,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 970 transitions, 23873 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) [2024-06-14 11:34:30,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:30,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:30,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:32,348 INFO L124 PetriNetUnfolderBase]: 3673/6140 cut-off events. [2024-06-14 11:34:32,349 INFO L125 PetriNetUnfolderBase]: For 1004692/1004692 co-relation queries the response was YES. [2024-06-14 11:34:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60739 conditions, 6140 events. 3673/6140 cut-off events. For 1004692/1004692 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 41247 event pairs, 759 based on Foata normal form. 2/6105 useless extension candidates. Maximal degree in co-relation 60470. Up to 4492 conditions per place. [2024-06-14 11:34:32,458 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 656 changer transitions 0/997 dead transitions. [2024-06-14 11:34:32,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 997 transitions, 26263 flow [2024-06-14 11:34:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:34:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:34:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-14 11:34:32,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49530956848030017 [2024-06-14 11:34:32,460 INFO L175 Difference]: Start difference. First operand has 606 places, 970 transitions, 23873 flow. Second operand 13 states and 264 transitions. [2024-06-14 11:34:32,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 997 transitions, 26263 flow [2024-06-14 11:34:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 997 transitions, 25213 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-14 11:34:40,140 INFO L231 Difference]: Finished difference. Result has 609 places, 970 transitions, 24151 flow [2024-06-14 11:34:40,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22825, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=24151, PETRI_PLACES=609, PETRI_TRANSITIONS=970} [2024-06-14 11:34:40,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 567 predicate places. [2024-06-14 11:34:40,140 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 970 transitions, 24151 flow [2024-06-14 11:34:40,140 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) [2024-06-14 11:34:40,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:40,141 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] [2024-06-14 11:34:40,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 11:34:40,141 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:40,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1459113910, now seen corresponding path program 5 times [2024-06-14 11:34:40,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:40,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788877858] [2024-06-14 11:34:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:40,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:40,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:40,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788877858] [2024-06-14 11:34:40,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788877858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:40,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:40,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:34:40,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371646876] [2024-06-14 11:34:40,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:34:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:34:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:34:40,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:40,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 970 transitions, 24151 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) [2024-06-14 11:34:40,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:40,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:40,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:42,207 INFO L124 PetriNetUnfolderBase]: 3681/6179 cut-off events. [2024-06-14 11:34:42,207 INFO L125 PetriNetUnfolderBase]: For 1007815/1007820 co-relation queries the response was YES. [2024-06-14 11:34:42,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61044 conditions, 6179 events. 3681/6179 cut-off events. For 1007815/1007820 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 41821 event pairs, 945 based on Foata normal form. 6/6169 useless extension candidates. Maximal degree in co-relation 60775. Up to 5181 conditions per place. [2024-06-14 11:34:42,320 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 721 selfloop transitions, 263 changer transitions 0/990 dead transitions. [2024-06-14 11:34:42,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 990 transitions, 26282 flow [2024-06-14 11:34:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:34:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:34:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:34:42,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 11:34:42,320 INFO L175 Difference]: Start difference. First operand has 609 places, 970 transitions, 24151 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:34:42,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 990 transitions, 26282 flow [2024-06-14 11:34:49,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 990 transitions, 24964 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-06-14 11:34:49,651 INFO L231 Difference]: Finished difference. Result has 605 places, 972 transitions, 23441 flow [2024-06-14 11:34:49,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22833, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23441, PETRI_PLACES=605, PETRI_TRANSITIONS=972} [2024-06-14 11:34:49,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 563 predicate places. [2024-06-14 11:34:49,653 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 972 transitions, 23441 flow [2024-06-14 11:34:49,654 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) [2024-06-14 11:34:49,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:49,654 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] [2024-06-14 11:34:49,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 11:34:49,655 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:49,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:49,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1459478191, now seen corresponding path program 32 times [2024-06-14 11:34:49,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:49,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047289188] [2024-06-14 11:34:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:49,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047289188] [2024-06-14 11:34:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047289188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:49,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:49,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:34:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050202318] [2024-06-14 11:34:49,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:49,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:34:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:34:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:34:49,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:49,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 972 transitions, 23441 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) [2024-06-14 11:34:49,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:49,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:49,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:51,824 INFO L124 PetriNetUnfolderBase]: 3691/6186 cut-off events. [2024-06-14 11:34:51,824 INFO L125 PetriNetUnfolderBase]: For 1004224/1004224 co-relation queries the response was YES. [2024-06-14 11:34:51,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60333 conditions, 6186 events. 3691/6186 cut-off events. For 1004224/1004224 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 41734 event pairs, 768 based on Foata normal form. 2/6151 useless extension candidates. Maximal degree in co-relation 60064. Up to 4516 conditions per place. [2024-06-14 11:34:51,934 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 342 selfloop transitions, 655 changer transitions 0/1003 dead transitions. [2024-06-14 11:34:51,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1003 transitions, 26194 flow [2024-06-14 11:34:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:34:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:34:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 265 transitions. [2024-06-14 11:34:51,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971857410881801 [2024-06-14 11:34:51,935 INFO L175 Difference]: Start difference. First operand has 605 places, 972 transitions, 23441 flow. Second operand 13 states and 265 transitions. [2024-06-14 11:34:51,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1003 transitions, 26194 flow [2024-06-14 11:34:58,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1003 transitions, 25624 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 11:34:59,002 INFO L231 Difference]: Finished difference. Result has 611 places, 978 transitions, 24310 flow [2024-06-14 11:34:59,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22871, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=24310, PETRI_PLACES=611, PETRI_TRANSITIONS=978} [2024-06-14 11:34:59,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 569 predicate places. [2024-06-14 11:34:59,003 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 978 transitions, 24310 flow [2024-06-14 11:34:59,003 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) [2024-06-14 11:34:59,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:59,003 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] [2024-06-14 11:34:59,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 11:34:59,003 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:34:59,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1126727779, now seen corresponding path program 33 times [2024-06-14 11:34:59,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:59,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279547488] [2024-06-14 11:34:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:59,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279547488] [2024-06-14 11:34:59,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279547488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:59,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:59,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:34:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333705290] [2024-06-14 11:34:59,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:59,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:34:59,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:34:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:34:59,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:59,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 978 transitions, 24310 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) [2024-06-14 11:34:59,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:59,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:01,074 INFO L124 PetriNetUnfolderBase]: 3701/6201 cut-off events. [2024-06-14 11:35:01,074 INFO L125 PetriNetUnfolderBase]: For 1023261/1023261 co-relation queries the response was YES. [2024-06-14 11:35:01,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61358 conditions, 6201 events. 3701/6201 cut-off events. For 1023261/1023261 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 41811 event pairs, 770 based on Foata normal form. 2/6166 useless extension candidates. Maximal degree in co-relation 61088. Up to 4528 conditions per place. [2024-06-14 11:35:01,334 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 343 selfloop transitions, 656 changer transitions 0/1005 dead transitions. [2024-06-14 11:35:01,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1005 transitions, 26825 flow [2024-06-14 11:35:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:35:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:35:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 11:35:01,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 11:35:01,335 INFO L175 Difference]: Start difference. First operand has 611 places, 978 transitions, 24310 flow. Second operand 10 states and 213 transitions. [2024-06-14 11:35:01,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1005 transitions, 26825 flow [2024-06-14 11:35:08,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1005 transitions, 25775 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-14 11:35:08,871 INFO L231 Difference]: Finished difference. Result has 611 places, 984 transitions, 24715 flow [2024-06-14 11:35:08,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23286, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24715, PETRI_PLACES=611, PETRI_TRANSITIONS=984} [2024-06-14 11:35:08,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 569 predicate places. [2024-06-14 11:35:08,872 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 984 transitions, 24715 flow [2024-06-14 11:35:08,872 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) [2024-06-14 11:35:08,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:08,872 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] [2024-06-14 11:35:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 11:35:08,872 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:08,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1459472611, now seen corresponding path program 34 times [2024-06-14 11:35:08,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:08,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543742060] [2024-06-14 11:35:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:08,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:08,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:08,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543742060] [2024-06-14 11:35:08,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543742060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:08,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:08,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:35:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595520421] [2024-06-14 11:35:08,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:35:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:35:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:35:09,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:09,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 984 transitions, 24715 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) [2024-06-14 11:35:09,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:09,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:09,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:11,113 INFO L124 PetriNetUnfolderBase]: 3695/6196 cut-off events. [2024-06-14 11:35:11,114 INFO L125 PetriNetUnfolderBase]: For 1010932/1010932 co-relation queries the response was YES. [2024-06-14 11:35:11,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61176 conditions, 6196 events. 3695/6196 cut-off events. For 1010932/1010932 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 41871 event pairs, 768 based on Foata normal form. 2/6161 useless extension candidates. Maximal degree in co-relation 60906. Up to 4522 conditions per place. [2024-06-14 11:35:11,224 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 343 selfloop transitions, 661 changer transitions 0/1010 dead transitions. [2024-06-14 11:35:11,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1010 transitions, 27123 flow [2024-06-14 11:35:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:35:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:35:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-14 11:35:11,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-14 11:35:11,225 INFO L175 Difference]: Start difference. First operand has 611 places, 984 transitions, 24715 flow. Second operand 15 states and 298 transitions. [2024-06-14 11:35:11,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1010 transitions, 27123 flow [2024-06-14 11:35:18,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1010 transitions, 25970 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 11:35:18,863 INFO L231 Difference]: Finished difference. Result has 617 places, 984 transitions, 24900 flow [2024-06-14 11:35:18,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23564, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=24900, PETRI_PLACES=617, PETRI_TRANSITIONS=984} [2024-06-14 11:35:18,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 575 predicate places. [2024-06-14 11:35:18,864 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 984 transitions, 24900 flow [2024-06-14 11:35:18,865 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) [2024-06-14 11:35:18,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:18,865 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] [2024-06-14 11:35:18,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 11:35:18,865 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:18,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:18,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1126733359, now seen corresponding path program 35 times [2024-06-14 11:35:18,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:18,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974689071] [2024-06-14 11:35:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:18,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974689071] [2024-06-14 11:35:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974689071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:18,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:18,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:35:18,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493138316] [2024-06-14 11:35:18,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:18,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:35:18,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:35:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:35:19,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:19,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 984 transitions, 24900 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) [2024-06-14 11:35:19,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:19,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:19,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:20,977 INFO L124 PetriNetUnfolderBase]: 3705/6224 cut-off events. [2024-06-14 11:35:20,977 INFO L125 PetriNetUnfolderBase]: For 1012292/1012292 co-relation queries the response was YES. [2024-06-14 11:35:21,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61402 conditions, 6224 events. 3705/6224 cut-off events. For 1012292/1012292 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 42138 event pairs, 757 based on Foata normal form. 2/6189 useless extension candidates. Maximal degree in co-relation 61132. Up to 4534 conditions per place. [2024-06-14 11:35:21,096 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 662 changer transitions 0/1014 dead transitions. [2024-06-14 11:35:21,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 1014 transitions, 27698 flow [2024-06-14 11:35:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:35:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:35:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 11:35:21,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 11:35:21,097 INFO L175 Difference]: Start difference. First operand has 617 places, 984 transitions, 24900 flow. Second operand 12 states and 254 transitions. [2024-06-14 11:35:21,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 1014 transitions, 27698 flow [2024-06-14 11:35:28,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1014 transitions, 25747 flow, removed 3 selfloop flow, removed 17 redundant places. [2024-06-14 11:35:28,780 INFO L231 Difference]: Finished difference. Result has 612 places, 990 transitions, 24429 flow [2024-06-14 11:35:28,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22977, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24429, PETRI_PLACES=612, PETRI_TRANSITIONS=990} [2024-06-14 11:35:28,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 570 predicate places. [2024-06-14 11:35:28,781 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 990 transitions, 24429 flow [2024-06-14 11:35:28,781 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) [2024-06-14 11:35:28,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:28,781 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] [2024-06-14 11:35:28,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 11:35:28,781 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:28,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1459305211, now seen corresponding path program 36 times [2024-06-14 11:35:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:28,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531286082] [2024-06-14 11:35:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:28,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:28,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:28,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531286082] [2024-06-14 11:35:28,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531286082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:28,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:28,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:35:28,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319136425] [2024-06-14 11:35:28,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:28,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:35:28,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:35:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:35:28,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:28,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 990 transitions, 24429 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) [2024-06-14 11:35:28,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:28,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:28,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:30,926 INFO L124 PetriNetUnfolderBase]: 3715/6230 cut-off events. [2024-06-14 11:35:30,927 INFO L125 PetriNetUnfolderBase]: For 1005877/1005877 co-relation queries the response was YES. [2024-06-14 11:35:31,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61176 conditions, 6230 events. 3715/6230 cut-off events. For 1005877/1005877 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42159 event pairs, 747 based on Foata normal form. 2/6195 useless extension candidates. Maximal degree in co-relation 60906. Up to 4546 conditions per place. [2024-06-14 11:35:31,041 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 678 changer transitions 0/1021 dead transitions. [2024-06-14 11:35:31,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1021 transitions, 27231 flow [2024-06-14 11:35:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:35:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:35:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-14 11:35:31,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-14 11:35:31,043 INFO L175 Difference]: Start difference. First operand has 612 places, 990 transitions, 24429 flow. Second operand 13 states and 269 transitions. [2024-06-14 11:35:31,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1021 transitions, 27231 flow [2024-06-14 11:35:38,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 1021 transitions, 25388 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-06-14 11:35:38,119 INFO L231 Difference]: Finished difference. Result has 613 places, 996 transitions, 24084 flow [2024-06-14 11:35:38,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22626, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=672, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=24084, PETRI_PLACES=613, PETRI_TRANSITIONS=996} [2024-06-14 11:35:38,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 571 predicate places. [2024-06-14 11:35:38,119 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 996 transitions, 24084 flow [2024-06-14 11:35:38,119 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) [2024-06-14 11:35:38,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:38,119 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] [2024-06-14 11:35:38,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 11:35:38,119 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:38,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1459294051, now seen corresponding path program 37 times [2024-06-14 11:35:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:38,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299167433] [2024-06-14 11:35:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:38,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:38,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:38,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299167433] [2024-06-14 11:35:38,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299167433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:38,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:38,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:35:38,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339933275] [2024-06-14 11:35:38,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:38,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:35:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:35:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:35:38,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:38,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 996 transitions, 24084 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) [2024-06-14 11:35:38,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:38,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:38,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:40,247 INFO L124 PetriNetUnfolderBase]: 3709/6222 cut-off events. [2024-06-14 11:35:40,247 INFO L125 PetriNetUnfolderBase]: For 984634/984634 co-relation queries the response was YES. [2024-06-14 11:35:40,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60546 conditions, 6222 events. 3709/6222 cut-off events. For 984634/984634 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42115 event pairs, 747 based on Foata normal form. 2/6187 useless extension candidates. Maximal degree in co-relation 60277. Up to 4540 conditions per place. [2024-06-14 11:35:40,363 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 668 changer transitions 0/1019 dead transitions. [2024-06-14 11:35:40,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1019 transitions, 26504 flow [2024-06-14 11:35:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:35:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:35:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-14 11:35:40,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-14 11:35:40,364 INFO L175 Difference]: Start difference. First operand has 613 places, 996 transitions, 24084 flow. Second operand 12 states and 253 transitions. [2024-06-14 11:35:40,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1019 transitions, 26504 flow [2024-06-14 11:35:47,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 1019 transitions, 25148 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-14 11:35:47,631 INFO L231 Difference]: Finished difference. Result has 614 places, 996 transitions, 24082 flow [2024-06-14 11:35:47,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22730, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=668, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24082, PETRI_PLACES=614, PETRI_TRANSITIONS=996} [2024-06-14 11:35:47,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 572 predicate places. [2024-06-14 11:35:47,632 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 996 transitions, 24082 flow [2024-06-14 11:35:47,632 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) [2024-06-14 11:35:47,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:47,632 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] [2024-06-14 11:35:47,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 11:35:47,632 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:47,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1475110180, now seen corresponding path program 6 times [2024-06-14 11:35:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:47,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259538420] [2024-06-14 11:35:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:47,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259538420] [2024-06-14 11:35:47,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259538420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:47,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:47,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772851645] [2024-06-14 11:35:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:47,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:47,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:47,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:47,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 996 transitions, 24082 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) [2024-06-14 11:35:47,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:47,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:47,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:49,754 INFO L124 PetriNetUnfolderBase]: 3745/6298 cut-off events. [2024-06-14 11:35:49,754 INFO L125 PetriNetUnfolderBase]: For 1044427/1044427 co-relation queries the response was YES. [2024-06-14 11:35:49,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61208 conditions, 6298 events. 3745/6298 cut-off events. For 1044427/1044427 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 42693 event pairs, 700 based on Foata normal form. 10/6302 useless extension candidates. Maximal degree in co-relation 60939. Up to 5269 conditions per place. [2024-06-14 11:35:49,871 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 844 selfloop transitions, 166 changer transitions 0/1016 dead transitions. [2024-06-14 11:35:49,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1016 transitions, 26256 flow [2024-06-14 11:35:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 11:35:49,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:35:49,872 INFO L175 Difference]: Start difference. First operand has 614 places, 996 transitions, 24082 flow. Second operand 8 states and 180 transitions. [2024-06-14 11:35:49,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1016 transitions, 26256 flow [2024-06-14 11:35:57,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1016 transitions, 24824 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-06-14 11:35:57,080 INFO L231 Difference]: Finished difference. Result has 609 places, 998 transitions, 23073 flow [2024-06-14 11:35:57,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22650, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23073, PETRI_PLACES=609, PETRI_TRANSITIONS=998} [2024-06-14 11:35:57,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 567 predicate places. [2024-06-14 11:35:57,080 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 998 transitions, 23073 flow [2024-06-14 11:35:57,080 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) [2024-06-14 11:35:57,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:57,081 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] [2024-06-14 11:35:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 11:35:57,081 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:35:57,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1483681060, now seen corresponding path program 7 times [2024-06-14 11:35:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:57,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727110606] [2024-06-14 11:35:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:57,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:57,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727110606] [2024-06-14 11:35:57,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727110606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:57,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:57,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:35:57,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728151880] [2024-06-14 11:35:57,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:57,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:35:57,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:35:57,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:35:57,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:57,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 998 transitions, 23073 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) [2024-06-14 11:35:57,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:57,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:57,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:59,433 INFO L124 PetriNetUnfolderBase]: 4033/6768 cut-off events. [2024-06-14 11:35:59,434 INFO L125 PetriNetUnfolderBase]: For 1381613/1381613 co-relation queries the response was YES. [2024-06-14 11:35:59,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69032 conditions, 6768 events. 4033/6768 cut-off events. For 1381613/1381613 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 46114 event pairs, 794 based on Foata normal form. 10/6772 useless extension candidates. Maximal degree in co-relation 68763. Up to 4636 conditions per place. [2024-06-14 11:35:59,559 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 849 selfloop transitions, 173 changer transitions 0/1028 dead transitions. [2024-06-14 11:35:59,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1028 transitions, 25670 flow [2024-06-14 11:35:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:35:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:35:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 11:35:59,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 11:35:59,560 INFO L175 Difference]: Start difference. First operand has 609 places, 998 transitions, 23073 flow. Second operand 8 states and 186 transitions. [2024-06-14 11:35:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1028 transitions, 25670 flow [2024-06-14 11:36:08,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 1028 transitions, 25335 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:08,292 INFO L231 Difference]: Finished difference. Result has 613 places, 1002 transitions, 23290 flow [2024-06-14 11:36:08,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22738, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23290, PETRI_PLACES=613, PETRI_TRANSITIONS=1002} [2024-06-14 11:36:08,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 571 predicate places. [2024-06-14 11:36:08,292 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1002 transitions, 23290 flow [2024-06-14 11:36:08,293 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) [2024-06-14 11:36:08,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:08,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:08,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 11:36:08,293 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:08,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2104299622, now seen corresponding path program 8 times [2024-06-14 11:36:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158087104] [2024-06-14 11:36:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:08,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158087104] [2024-06-14 11:36:08,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158087104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:08,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:08,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:08,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089985925] [2024-06-14 11:36:08,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:08,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:08,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:08,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:08,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1002 transitions, 23290 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) [2024-06-14 11:36:08,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:08,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:08,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:10,594 INFO L124 PetriNetUnfolderBase]: 4010/6717 cut-off events. [2024-06-14 11:36:10,594 INFO L125 PetriNetUnfolderBase]: For 1338401/1338401 co-relation queries the response was YES. [2024-06-14 11:36:10,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67714 conditions, 6717 events. 4010/6717 cut-off events. For 1338401/1338401 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 45785 event pairs, 817 based on Foata normal form. 10/6721 useless extension candidates. Maximal degree in co-relation 67443. Up to 5696 conditions per place. [2024-06-14 11:36:10,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 843 selfloop transitions, 178 changer transitions 0/1027 dead transitions. [2024-06-14 11:36:10,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1027 transitions, 25558 flow [2024-06-14 11:36:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 11:36:10,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:36:10,725 INFO L175 Difference]: Start difference. First operand has 613 places, 1002 transitions, 23290 flow. Second operand 8 states and 184 transitions. [2024-06-14 11:36:10,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1027 transitions, 25558 flow [2024-06-14 11:36:20,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1027 transitions, 25277 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:20,227 INFO L231 Difference]: Finished difference. Result has 616 places, 1004 transitions, 23461 flow [2024-06-14 11:36:20,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23017, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23461, PETRI_PLACES=616, PETRI_TRANSITIONS=1004} [2024-06-14 11:36:20,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 574 predicate places. [2024-06-14 11:36:20,227 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 1004 transitions, 23461 flow [2024-06-14 11:36:20,227 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) [2024-06-14 11:36:20,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:20,227 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] [2024-06-14 11:36:20,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 11:36:20,227 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:20,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1475103019, now seen corresponding path program 38 times [2024-06-14 11:36:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:20,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020864467] [2024-06-14 11:36:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:20,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:20,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:20,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020864467] [2024-06-14 11:36:20,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020864467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:20,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:20,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:36:20,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253166185] [2024-06-14 11:36:20,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:20,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:36:20,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:36:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:36:20,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:20,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 1004 transitions, 23461 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) [2024-06-14 11:36:20,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:20,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:20,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:22,584 INFO L124 PetriNetUnfolderBase]: 4023/6774 cut-off events. [2024-06-14 11:36:22,585 INFO L125 PetriNetUnfolderBase]: For 1268495/1268495 co-relation queries the response was YES. [2024-06-14 11:36:22,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67960 conditions, 6774 events. 4023/6774 cut-off events. For 1268495/1268495 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 46431 event pairs, 832 based on Foata normal form. 1/6769 useless extension candidates. Maximal degree in co-relation 67687. Up to 5647 conditions per place. [2024-06-14 11:36:22,709 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 781 selfloop transitions, 240 changer transitions 0/1027 dead transitions. [2024-06-14 11:36:22,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 1027 transitions, 26204 flow [2024-06-14 11:36:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:36:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:36:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 11:36:22,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 11:36:22,710 INFO L175 Difference]: Start difference. First operand has 616 places, 1004 transitions, 23461 flow. Second operand 8 states and 178 transitions. [2024-06-14 11:36:22,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 1027 transitions, 26204 flow [2024-06-14 11:36:31,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1027 transitions, 25815 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:31,343 INFO L231 Difference]: Finished difference. Result has 618 places, 1010 transitions, 23692 flow [2024-06-14 11:36:31,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23072, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23692, PETRI_PLACES=618, PETRI_TRANSITIONS=1010} [2024-06-14 11:36:31,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 576 predicate places. [2024-06-14 11:36:31,343 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1010 transitions, 23692 flow [2024-06-14 11:36:31,343 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) [2024-06-14 11:36:31,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:31,344 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] [2024-06-14 11:36:31,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 11:36:31,344 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:31,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1475097439, now seen corresponding path program 39 times [2024-06-14 11:36:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297664992] [2024-06-14 11:36:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:31,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:31,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:31,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297664992] [2024-06-14 11:36:31,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297664992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:31,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:31,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:36:31,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313495588] [2024-06-14 11:36:31,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:31,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:36:31,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:31,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:36:31,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:36:31,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:31,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1010 transitions, 23692 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) [2024-06-14 11:36:31,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:31,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:31,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:33,715 INFO L124 PetriNetUnfolderBase]: 4028/6771 cut-off events. [2024-06-14 11:36:33,715 INFO L125 PetriNetUnfolderBase]: For 1283714/1283714 co-relation queries the response was YES. [2024-06-14 11:36:33,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67897 conditions, 6771 events. 4028/6771 cut-off events. For 1283714/1283714 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46386 event pairs, 822 based on Foata normal form. 1/6766 useless extension candidates. Maximal degree in co-relation 67623. Up to 5653 conditions per place. [2024-06-14 11:36:33,840 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 790 selfloop transitions, 234 changer transitions 0/1030 dead transitions. [2024-06-14 11:36:33,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1030 transitions, 26132 flow [2024-06-14 11:36:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:36:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:36:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 11:36:33,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 11:36:33,840 INFO L175 Difference]: Start difference. First operand has 618 places, 1010 transitions, 23692 flow. Second operand 9 states and 194 transitions. [2024-06-14 11:36:33,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1030 transitions, 26132 flow [2024-06-14 11:36:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 1030 transitions, 25887 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:43,271 INFO L231 Difference]: Finished difference. Result has 623 places, 1013 transitions, 23998 flow [2024-06-14 11:36:43,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23452, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23998, PETRI_PLACES=623, PETRI_TRANSITIONS=1013} [2024-06-14 11:36:43,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 581 predicate places. [2024-06-14 11:36:43,271 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 1013 transitions, 23998 flow [2024-06-14 11:36:43,272 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) [2024-06-14 11:36:43,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:43,272 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] [2024-06-14 11:36:43,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 11:36:43,272 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:43,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2103935341, now seen corresponding path program 40 times [2024-06-14 11:36:43,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:43,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842042411] [2024-06-14 11:36:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:43,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:43,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:43,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842042411] [2024-06-14 11:36:43,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842042411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:43,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:43,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:36:43,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016923970] [2024-06-14 11:36:43,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:43,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:36:43,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:43,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:36:43,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:36:43,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:43,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1013 transitions, 23998 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) [2024-06-14 11:36:43,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:43,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:43,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:45,729 INFO L124 PetriNetUnfolderBase]: 4025/6765 cut-off events. [2024-06-14 11:36:45,730 INFO L125 PetriNetUnfolderBase]: For 1281001/1281001 co-relation queries the response was YES. [2024-06-14 11:36:45,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67839 conditions, 6765 events. 4025/6765 cut-off events. For 1281001/1281001 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46299 event pairs, 824 based on Foata normal form. 1/6760 useless extension candidates. Maximal degree in co-relation 67565. Up to 5650 conditions per place. [2024-06-14 11:36:45,860 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 785 selfloop transitions, 253 changer transitions 0/1044 dead transitions. [2024-06-14 11:36:45,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1044 transitions, 26776 flow [2024-06-14 11:36:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:36:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:36:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 11:36:45,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:36:45,861 INFO L175 Difference]: Start difference. First operand has 623 places, 1013 transitions, 23998 flow. Second operand 9 states and 207 transitions. [2024-06-14 11:36:45,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1044 transitions, 26776 flow [2024-06-14 11:36:54,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1044 transitions, 26250 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 11:36:54,754 INFO L231 Difference]: Finished difference. Result has 622 places, 1013 transitions, 23992 flow [2024-06-14 11:36:54,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23476, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23992, PETRI_PLACES=622, PETRI_TRANSITIONS=1013} [2024-06-14 11:36:54,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 580 predicate places. [2024-06-14 11:36:54,755 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1013 transitions, 23992 flow [2024-06-14 11:36:54,755 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) [2024-06-14 11:36:54,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:54,755 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] [2024-06-14 11:36:54,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 11:36:54,755 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:36:54,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1246850329, now seen corresponding path program 41 times [2024-06-14 11:36:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:54,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758880926] [2024-06-14 11:36:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:54,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:54,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758880926] [2024-06-14 11:36:54,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758880926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:54,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:54,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:36:54,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819607337] [2024-06-14 11:36:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:54,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:36:54,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:36:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:36:54,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:54,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1013 transitions, 23992 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) [2024-06-14 11:36:54,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:54,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:54,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:57,257 INFO L124 PetriNetUnfolderBase]: 4030/6762 cut-off events. [2024-06-14 11:36:57,257 INFO L125 PetriNetUnfolderBase]: For 1281678/1281678 co-relation queries the response was YES. [2024-06-14 11:36:57,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67924 conditions, 6762 events. 4030/6762 cut-off events. For 1281678/1281678 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 46186 event pairs, 814 based on Foata normal form. 1/6757 useless extension candidates. Maximal degree in co-relation 67650. Up to 5656 conditions per place. [2024-06-14 11:36:57,383 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 785 selfloop transitions, 258 changer transitions 0/1049 dead transitions. [2024-06-14 11:36:57,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1049 transitions, 26858 flow [2024-06-14 11:36:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:36:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:36:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 11:36:57,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 11:36:57,383 INFO L175 Difference]: Start difference. First operand has 622 places, 1013 transitions, 23992 flow. Second operand 11 states and 241 transitions. [2024-06-14 11:36:57,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1049 transitions, 26858 flow [2024-06-14 11:37:05,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1049 transitions, 26175 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 11:37:05,664 INFO L231 Difference]: Finished difference. Result has 625 places, 1016 transitions, 23913 flow [2024-06-14 11:37:05,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23322, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23913, PETRI_PLACES=625, PETRI_TRANSITIONS=1016} [2024-06-14 11:37:05,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 583 predicate places. [2024-06-14 11:37:05,665 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 1016 transitions, 23913 flow [2024-06-14 11:37:05,665 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) [2024-06-14 11:37:05,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:05,665 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] [2024-06-14 11:37:05,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 11:37:05,665 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:05,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2104119481, now seen corresponding path program 42 times [2024-06-14 11:37:05,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:05,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831715355] [2024-06-14 11:37:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:05,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:05,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:05,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831715355] [2024-06-14 11:37:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831715355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:05,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499698684] [2024-06-14 11:37:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:05,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:37:05,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 1016 transitions, 23913 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) [2024-06-14 11:37:05,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:05,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:37:05,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:08,132 INFO L124 PetriNetUnfolderBase]: 4035/6775 cut-off events. [2024-06-14 11:37:08,132 INFO L125 PetriNetUnfolderBase]: For 1277322/1277322 co-relation queries the response was YES. [2024-06-14 11:37:08,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67900 conditions, 6775 events. 4035/6775 cut-off events. For 1277322/1277322 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 46415 event pairs, 810 based on Foata normal form. 1/6770 useless extension candidates. Maximal degree in co-relation 67626. Up to 5662 conditions per place. [2024-06-14 11:37:08,263 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 777 selfloop transitions, 259 changer transitions 0/1042 dead transitions. [2024-06-14 11:37:08,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1042 transitions, 26711 flow [2024-06-14 11:37:08,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:37:08,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 11:37:08,264 INFO L175 Difference]: Start difference. First operand has 625 places, 1016 transitions, 23913 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:37:08,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1042 transitions, 26711 flow [2024-06-14 11:37:17,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 1042 transitions, 26171 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 11:37:17,057 INFO L231 Difference]: Finished difference. Result has 623 places, 1019 transitions, 23976 flow [2024-06-14 11:37:17,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23383, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23976, PETRI_PLACES=623, PETRI_TRANSITIONS=1019} [2024-06-14 11:37:17,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 581 predicate places. [2024-06-14 11:37:17,058 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 1019 transitions, 23976 flow [2024-06-14 11:37:17,058 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) [2024-06-14 11:37:17,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:17,058 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] [2024-06-14 11:37:17,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 11:37:17,058 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:17,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1247017729, now seen corresponding path program 43 times [2024-06-14 11:37:17,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:17,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592313494] [2024-06-14 11:37:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:17,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:17,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:17,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592313494] [2024-06-14 11:37:17,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592313494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:17,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:17,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:17,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521943882] [2024-06-14 11:37:17,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:17,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:17,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:17,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:37:17,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1019 transitions, 23976 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) [2024-06-14 11:37:17,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:17,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:37:17,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:19,405 INFO L124 PetriNetUnfolderBase]: 4032/6767 cut-off events. [2024-06-14 11:37:19,405 INFO L125 PetriNetUnfolderBase]: For 1268735/1268735 co-relation queries the response was YES. [2024-06-14 11:37:19,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67726 conditions, 6767 events. 4032/6767 cut-off events. For 1268735/1268735 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 46310 event pairs, 809 based on Foata normal form. 1/6762 useless extension candidates. Maximal degree in co-relation 67452. Up to 5659 conditions per place. [2024-06-14 11:37:19,535 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 780 selfloop transitions, 259 changer transitions 0/1045 dead transitions. [2024-06-14 11:37:19,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1045 transitions, 26484 flow [2024-06-14 11:37:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 11:37:19,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:37:19,536 INFO L175 Difference]: Start difference. First operand has 623 places, 1019 transitions, 23976 flow. Second operand 8 states and 184 transitions. [2024-06-14 11:37:19,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1045 transitions, 26484 flow [2024-06-14 11:37:27,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1045 transitions, 26022 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:37:27,961 INFO L231 Difference]: Finished difference. Result has 625 places, 1019 transitions, 24044 flow [2024-06-14 11:37:27,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23516, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24044, PETRI_PLACES=625, PETRI_TRANSITIONS=1019} [2024-06-14 11:37:27,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 583 predicate places. [2024-06-14 11:37:27,961 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 1019 transitions, 24044 flow [2024-06-14 11:37:27,961 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) [2024-06-14 11:37:27,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:27,961 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] [2024-06-14 11:37:27,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 11:37:27,961 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:27,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1247196289, now seen corresponding path program 44 times [2024-06-14 11:37:27,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:27,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702125056] [2024-06-14 11:37:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702125056] [2024-06-14 11:37:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702125056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:28,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:28,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:37:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81554717] [2024-06-14 11:37:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:28,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:37:28,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:28,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:37:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:37:28,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:37:28,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 1019 transitions, 24044 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) [2024-06-14 11:37:28,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:28,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:37:28,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:30,346 INFO L124 PetriNetUnfolderBase]: 4029/6771 cut-off events. [2024-06-14 11:37:30,347 INFO L125 PetriNetUnfolderBase]: For 1262453/1262453 co-relation queries the response was YES. [2024-06-14 11:37:30,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67644 conditions, 6771 events. 4029/6771 cut-off events. For 1262453/1262453 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 46342 event pairs, 816 based on Foata normal form. 1/6766 useless extension candidates. Maximal degree in co-relation 67370. Up to 5656 conditions per place. [2024-06-14 11:37:30,476 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 778 selfloop transitions, 257 changer transitions 0/1041 dead transitions. [2024-06-14 11:37:30,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1041 transitions, 26259 flow [2024-06-14 11:37:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:37:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:37:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 11:37:30,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 11:37:30,477 INFO L175 Difference]: Start difference. First operand has 625 places, 1019 transitions, 24044 flow. Second operand 9 states and 197 transitions. [2024-06-14 11:37:30,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1041 transitions, 26259 flow [2024-06-14 11:37:39,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1041 transitions, 25624 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:37:39,290 INFO L231 Difference]: Finished difference. Result has 626 places, 1019 transitions, 23933 flow [2024-06-14 11:37:39,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23409, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23933, PETRI_PLACES=626, PETRI_TRANSITIONS=1019} [2024-06-14 11:37:39,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 584 predicate places. [2024-06-14 11:37:39,291 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 1019 transitions, 23933 flow [2024-06-14 11:37:39,291 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) [2024-06-14 11:37:39,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:39,291 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] [2024-06-14 11:37:39,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 11:37:39,292 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:39,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:39,292 INFO L85 PathProgramCache]: Analyzing trace with hash 57642247, now seen corresponding path program 45 times [2024-06-14 11:37:39,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:39,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484618259] [2024-06-14 11:37:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:39,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484618259] [2024-06-14 11:37:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484618259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:39,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:39,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163065489] [2024-06-14 11:37:39,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:39,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:39,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:39,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:37:39,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 1019 transitions, 23933 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) [2024-06-14 11:37:39,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:39,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:37:39,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:41,660 INFO L124 PetriNetUnfolderBase]: 4034/6771 cut-off events. [2024-06-14 11:37:41,660 INFO L125 PetriNetUnfolderBase]: For 1269891/1269900 co-relation queries the response was YES. [2024-06-14 11:37:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67644 conditions, 6771 events. 4034/6771 cut-off events. For 1269891/1269900 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 46393 event pairs, 899 based on Foata normal form. 7/6763 useless extension candidates. Maximal degree in co-relation 67370. Up to 4958 conditions per place. [2024-06-14 11:37:41,784 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 379 selfloop transitions, 656 changer transitions 0/1041 dead transitions. [2024-06-14 11:37:41,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1041 transitions, 26456 flow [2024-06-14 11:37:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 11:37:41,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:37:41,784 INFO L175 Difference]: Start difference. First operand has 626 places, 1019 transitions, 23933 flow. Second operand 8 states and 176 transitions. [2024-06-14 11:37:41,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1041 transitions, 26456 flow [2024-06-14 11:37:50,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 1041 transitions, 25834 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:37:50,816 INFO L231 Difference]: Finished difference. Result has 624 places, 1022 transitions, 24694 flow [2024-06-14 11:37:50,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23313, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24694, PETRI_PLACES=624, PETRI_TRANSITIONS=1022} [2024-06-14 11:37:50,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 582 predicate places. [2024-06-14 11:37:50,817 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 1022 transitions, 24694 flow [2024-06-14 11:37:50,817 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) [2024-06-14 11:37:50,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:37:50,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:37:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 11:37:50,817 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:37:50,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:37:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1191204636, now seen corresponding path program 9 times [2024-06-14 11:37:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:37:50,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186941768] [2024-06-14 11:37:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:37:50,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:37:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:37:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:37:50,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:37:50,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186941768] [2024-06-14 11:37:50,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186941768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:37:50,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:37:50,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:37:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930866564] [2024-06-14 11:37:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:37:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:37:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:37:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:37:50,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:37:50,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:37:50,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 1022 transitions, 24694 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) [2024-06-14 11:37:50,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:37:50,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:37:50,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:37:53,167 INFO L124 PetriNetUnfolderBase]: 4042/6775 cut-off events. [2024-06-14 11:37:53,167 INFO L125 PetriNetUnfolderBase]: For 1282061/1282066 co-relation queries the response was YES. [2024-06-14 11:37:53,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68605 conditions, 6775 events. 4042/6775 cut-off events. For 1282061/1282066 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46500 event pairs, 1111 based on Foata normal form. 6/6765 useless extension candidates. Maximal degree in co-relation 68331. Up to 5720 conditions per place. [2024-06-14 11:37:53,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 773 selfloop transitions, 262 changer transitions 0/1041 dead transitions. [2024-06-14 11:37:53,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1041 transitions, 26935 flow [2024-06-14 11:37:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:37:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:37:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:37:53,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:37:53,293 INFO L175 Difference]: Start difference. First operand has 624 places, 1022 transitions, 24694 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:37:53,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1041 transitions, 26935 flow [2024-06-14 11:38:02,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1041 transitions, 25456 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:02,023 INFO L231 Difference]: Finished difference. Result has 626 places, 1024 transitions, 23822 flow [2024-06-14 11:38:02,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23215, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23822, PETRI_PLACES=626, PETRI_TRANSITIONS=1024} [2024-06-14 11:38:02,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 584 predicate places. [2024-06-14 11:38:02,024 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 1024 transitions, 23822 flow [2024-06-14 11:38:02,024 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) [2024-06-14 11:38:02,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:02,024 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] [2024-06-14 11:38:02,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 11:38:02,024 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:02,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash -567756026, now seen corresponding path program 10 times [2024-06-14 11:38:02,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:02,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740583742] [2024-06-14 11:38:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:02,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:02,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:02,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740583742] [2024-06-14 11:38:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740583742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:02,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:02,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:38:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85955048] [2024-06-14 11:38:02,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:02,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:38:02,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:02,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:38:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:38:02,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:38:02,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 1024 transitions, 23822 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) [2024-06-14 11:38:02,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:02,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:38:02,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:04,350 INFO L124 PetriNetUnfolderBase]: 4050/6778 cut-off events. [2024-06-14 11:38:04,350 INFO L125 PetriNetUnfolderBase]: For 1293451/1293456 co-relation queries the response was YES. [2024-06-14 11:38:04,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68058 conditions, 6778 events. 4050/6778 cut-off events. For 1293451/1293456 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 46409 event pairs, 1103 based on Foata normal form. 6/6768 useless extension candidates. Maximal degree in co-relation 67784. Up to 5700 conditions per place. [2024-06-14 11:38:04,471 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 769 selfloop transitions, 269 changer transitions 0/1044 dead transitions. [2024-06-14 11:38:04,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 1044 transitions, 26075 flow [2024-06-14 11:38:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:38:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:38:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 11:38:04,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 11:38:04,472 INFO L175 Difference]: Start difference. First operand has 626 places, 1024 transitions, 23822 flow. Second operand 8 states and 172 transitions. [2024-06-14 11:38:04,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 1044 transitions, 26075 flow [2024-06-14 11:38:14,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 1044 transitions, 25508 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 11:38:14,045 INFO L231 Difference]: Finished difference. Result has 629 places, 1026 transitions, 23880 flow [2024-06-14 11:38:14,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23255, PETRI_DIFFERENCE_MINUEND_PLACES=621, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23880, PETRI_PLACES=629, PETRI_TRANSITIONS=1026} [2024-06-14 11:38:14,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 587 predicate places. [2024-06-14 11:38:14,046 INFO L495 AbstractCegarLoop]: Abstraction has has 629 places, 1026 transitions, 23880 flow [2024-06-14 11:38:14,046 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) [2024-06-14 11:38:14,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:14,046 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] [2024-06-14 11:38:14,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 11:38:14,046 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:14,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1758049801, now seen corresponding path program 46 times [2024-06-14 11:38:14,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:14,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331404739] [2024-06-14 11:38:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:14,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:14,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:14,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331404739] [2024-06-14 11:38:14,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331404739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:14,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:14,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:38:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085092372] [2024-06-14 11:38:14,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:14,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:38:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:38:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:38:14,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:38:14,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 1026 transitions, 23880 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) [2024-06-14 11:38:14,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:14,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:38:14,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:16,379 INFO L124 PetriNetUnfolderBase]: 4063/6793 cut-off events. [2024-06-14 11:38:16,379 INFO L125 PetriNetUnfolderBase]: For 1311304/1311304 co-relation queries the response was YES. [2024-06-14 11:38:16,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68479 conditions, 6793 events. 4063/6793 cut-off events. For 1311304/1311304 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 46389 event pairs, 940 based on Foata normal form. 1/6757 useless extension candidates. Maximal degree in co-relation 68204. Up to 4997 conditions per place. [2024-06-14 11:38:16,501 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 366 selfloop transitions, 684 changer transitions 0/1056 dead transitions. [2024-06-14 11:38:16,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 1056 transitions, 27018 flow [2024-06-14 11:38:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:38:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:38:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 11:38:16,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 11:38:16,501 INFO L175 Difference]: Start difference. First operand has 629 places, 1026 transitions, 23880 flow. Second operand 11 states and 235 transitions. [2024-06-14 11:38:16,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 1056 transitions, 27018 flow [2024-06-14 11:38:26,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 1056 transitions, 26409 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:26,114 INFO L231 Difference]: Finished difference. Result has 634 places, 1032 transitions, 24763 flow [2024-06-14 11:38:26,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23271, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=678, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=24763, PETRI_PLACES=634, PETRI_TRANSITIONS=1032} [2024-06-14 11:38:26,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 592 predicate places. [2024-06-14 11:38:26,115 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 1032 transitions, 24763 flow [2024-06-14 11:38:26,115 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) [2024-06-14 11:38:26,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:26,115 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] [2024-06-14 11:38:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 11:38:26,115 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:26,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:26,115 INFO L85 PathProgramCache]: Analyzing trace with hash -657816529, now seen corresponding path program 47 times [2024-06-14 11:38:26,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:26,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880712447] [2024-06-14 11:38:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:26,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880712447] [2024-06-14 11:38:26,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880712447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:26,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:26,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:38:26,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133637001] [2024-06-14 11:38:26,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:26,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:38:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:38:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:38:26,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:38:26,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1032 transitions, 24763 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) [2024-06-14 11:38:26,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:26,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:38:26,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:28,463 INFO L124 PetriNetUnfolderBase]: 4068/6768 cut-off events. [2024-06-14 11:38:28,463 INFO L125 PetriNetUnfolderBase]: For 1337712/1337712 co-relation queries the response was YES. [2024-06-14 11:38:28,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69439 conditions, 6768 events. 4068/6768 cut-off events. For 1337712/1337712 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 45945 event pairs, 993 based on Foata normal form. 1/6732 useless extension candidates. Maximal degree in co-relation 69163. Up to 5003 conditions per place. [2024-06-14 11:38:28,592 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 669 changer transitions 0/1055 dead transitions. [2024-06-14 11:38:28,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1055 transitions, 27324 flow [2024-06-14 11:38:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:38:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:38:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 11:38:28,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 11:38:28,593 INFO L175 Difference]: Start difference. First operand has 634 places, 1032 transitions, 24763 flow. Second operand 9 states and 193 transitions. [2024-06-14 11:38:28,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1055 transitions, 27324 flow [2024-06-14 11:38:38,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 1055 transitions, 25438 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-14 11:38:38,443 INFO L231 Difference]: Finished difference. Result has 634 places, 1035 transitions, 24286 flow [2024-06-14 11:38:38,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22903, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1032, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24286, PETRI_PLACES=634, PETRI_TRANSITIONS=1035} [2024-06-14 11:38:38,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 592 predicate places. [2024-06-14 11:38:38,444 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 1035 transitions, 24286 flow [2024-06-14 11:38:38,444 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) [2024-06-14 11:38:38,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:38,444 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] [2024-06-14 11:38:38,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 11:38:38,444 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:38,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash 775141417, now seen corresponding path program 48 times [2024-06-14 11:38:38,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:38,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905599171] [2024-06-14 11:38:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:38,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:38,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:38,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905599171] [2024-06-14 11:38:38,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905599171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:38,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:38,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:38:38,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498686582] [2024-06-14 11:38:38,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:38:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:38,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:38:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:38:38,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:38:38,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1035 transitions, 24286 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) [2024-06-14 11:38:38,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:38,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:38:38,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:40,666 INFO L124 PetriNetUnfolderBase]: 4065/6798 cut-off events. [2024-06-14 11:38:40,666 INFO L125 PetriNetUnfolderBase]: For 1336186/1336186 co-relation queries the response was YES. [2024-06-14 11:38:40,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68925 conditions, 6798 events. 4065/6798 cut-off events. For 1336186/1336186 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 46508 event pairs, 940 based on Foata normal form. 1/6762 useless extension candidates. Maximal degree in co-relation 68649. Up to 5000 conditions per place. [2024-06-14 11:38:40,916 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 672 changer transitions 0/1056 dead transitions. [2024-06-14 11:38:40,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 1056 transitions, 27050 flow [2024-06-14 11:38:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:38:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:38:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 11:38:40,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:38:40,917 INFO L175 Difference]: Start difference. First operand has 634 places, 1035 transitions, 24286 flow. Second operand 9 states and 198 transitions. [2024-06-14 11:38:40,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 1056 transitions, 27050 flow [2024-06-14 11:38:50,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1056 transitions, 26222 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 11:38:50,568 INFO L231 Difference]: Finished difference. Result has 637 places, 1035 transitions, 24808 flow [2024-06-14 11:38:50,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23458, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=672, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24808, PETRI_PLACES=637, PETRI_TRANSITIONS=1035} [2024-06-14 11:38:50,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 595 predicate places. [2024-06-14 11:38:50,569 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 1035 transitions, 24808 flow [2024-06-14 11:38:50,569 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) [2024-06-14 11:38:50,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:38:50,569 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] [2024-06-14 11:38:50,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 11:38:50,569 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:38:50,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:38:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash -657810949, now seen corresponding path program 49 times [2024-06-14 11:38:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:38:50,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770177978] [2024-06-14 11:38:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:38:50,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:38:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:38:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:38:50,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:38:50,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770177978] [2024-06-14 11:38:50,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770177978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:38:50,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:38:50,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:38:50,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163042626] [2024-06-14 11:38:50,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:38:50,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:38:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:38:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:38:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:38:50,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:38:50,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1035 transitions, 24808 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) [2024-06-14 11:38:50,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:38:50,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:38:50,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:38:52,891 INFO L124 PetriNetUnfolderBase]: 4062/6802 cut-off events. [2024-06-14 11:38:52,891 INFO L125 PetriNetUnfolderBase]: For 1354588/1354588 co-relation queries the response was YES. [2024-06-14 11:38:52,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69096 conditions, 6802 events. 4062/6802 cut-off events. For 1354588/1354588 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 46563 event pairs, 944 based on Foata normal form. 1/6766 useless extension candidates. Maximal degree in co-relation 68818. Up to 4997 conditions per place. [2024-06-14 11:38:53,026 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 689 changer transitions 0/1058 dead transitions. [2024-06-14 11:38:53,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 1058 transitions, 27320 flow [2024-06-14 11:38:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:38:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:38:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 11:38:53,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-14 11:38:53,027 INFO L175 Difference]: Start difference. First operand has 637 places, 1035 transitions, 24808 flow. Second operand 12 states and 251 transitions. [2024-06-14 11:38:53,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 1058 transitions, 27320 flow [2024-06-14 11:39:03,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 1058 transitions, 25876 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:39:03,614 INFO L231 Difference]: Finished difference. Result has 641 places, 1035 transitions, 24748 flow [2024-06-14 11:39:03,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23364, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=689, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24748, PETRI_PLACES=641, PETRI_TRANSITIONS=1035} [2024-06-14 11:39:03,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 599 predicate places. [2024-06-14 11:39:03,615 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 1035 transitions, 24748 flow [2024-06-14 11:39:03,615 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) [2024-06-14 11:39:03,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:03,615 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] [2024-06-14 11:39:03,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 11:39:03,615 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:03,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash -806246654, now seen corresponding path program 11 times [2024-06-14 11:39:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:03,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396806895] [2024-06-14 11:39:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:03,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:03,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:03,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396806895] [2024-06-14 11:39:03,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396806895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:03,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:03,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:03,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204254399] [2024-06-14 11:39:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:03,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:03,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:39:03,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 1035 transitions, 24748 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) [2024-06-14 11:39:03,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:03,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:39:03,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:06,029 INFO L124 PetriNetUnfolderBase]: 4070/6836 cut-off events. [2024-06-14 11:39:06,030 INFO L125 PetriNetUnfolderBase]: For 1375069/1375069 co-relation queries the response was YES. [2024-06-14 11:39:06,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69418 conditions, 6836 events. 4070/6836 cut-off events. For 1375069/1375069 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 46968 event pairs, 808 based on Foata normal form. 2/6832 useless extension candidates. Maximal degree in co-relation 69139. Up to 5766 conditions per place. [2024-06-14 11:39:06,162 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 830 selfloop transitions, 217 changer transitions 0/1053 dead transitions. [2024-06-14 11:39:06,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 1053 transitions, 26974 flow [2024-06-14 11:39:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:39:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:39:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 11:39:06,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 11:39:06,163 INFO L175 Difference]: Start difference. First operand has 641 places, 1035 transitions, 24748 flow. Second operand 9 states and 193 transitions. [2024-06-14 11:39:06,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 1053 transitions, 26974 flow [2024-06-14 11:39:15,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 1053 transitions, 24960 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-14 11:39:15,567 INFO L231 Difference]: Finished difference. Result has 638 places, 1037 transitions, 23259 flow [2024-06-14 11:39:15,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22734, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23259, PETRI_PLACES=638, PETRI_TRANSITIONS=1037} [2024-06-14 11:39:15,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 596 predicate places. [2024-06-14 11:39:15,568 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1037 transitions, 23259 flow [2024-06-14 11:39:15,568 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) [2024-06-14 11:39:15,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:15,568 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] [2024-06-14 11:39:15,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 11:39:15,568 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:15,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:15,568 INFO L85 PathProgramCache]: Analyzing trace with hash 237367702, now seen corresponding path program 12 times [2024-06-14 11:39:15,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:15,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196747251] [2024-06-14 11:39:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:15,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:15,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196747251] [2024-06-14 11:39:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196747251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:15,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:15,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:15,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076138158] [2024-06-14 11:39:15,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:15,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:15,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:15,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:39:15,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1037 transitions, 23259 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) [2024-06-14 11:39:15,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:15,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:39:15,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:17,981 INFO L124 PetriNetUnfolderBase]: 4078/6837 cut-off events. [2024-06-14 11:39:17,981 INFO L125 PetriNetUnfolderBase]: For 1382242/1382242 co-relation queries the response was YES. [2024-06-14 11:39:18,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68541 conditions, 6837 events. 4078/6837 cut-off events. For 1382242/1382242 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 46876 event pairs, 808 based on Foata normal form. 2/6833 useless extension candidates. Maximal degree in co-relation 68262. Up to 5924 conditions per place. [2024-06-14 11:39:18,106 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 938 selfloop transitions, 118 changer transitions 0/1062 dead transitions. [2024-06-14 11:39:18,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 1062 transitions, 25596 flow [2024-06-14 11:39:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:18,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 11:39:18,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 11:39:18,107 INFO L175 Difference]: Start difference. First operand has 638 places, 1037 transitions, 23259 flow. Second operand 8 states and 178 transitions. [2024-06-14 11:39:18,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 1062 transitions, 25596 flow [2024-06-14 11:39:27,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1062 transitions, 25087 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 11:39:27,948 INFO L231 Difference]: Finished difference. Result has 639 places, 1039 transitions, 23081 flow [2024-06-14 11:39:27,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22750, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=919, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23081, PETRI_PLACES=639, PETRI_TRANSITIONS=1039} [2024-06-14 11:39:27,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 597 predicate places. [2024-06-14 11:39:27,948 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 1039 transitions, 23081 flow [2024-06-14 11:39:27,948 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) [2024-06-14 11:39:27,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:27,948 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] [2024-06-14 11:39:27,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 11:39:27,948 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:27,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash 636865012, now seen corresponding path program 13 times [2024-06-14 11:39:27,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:27,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358573475] [2024-06-14 11:39:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:27,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:28,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:28,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358573475] [2024-06-14 11:39:28,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358573475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:28,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:28,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:28,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264279368] [2024-06-14 11:39:28,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:28,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:28,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:39:28,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 1039 transitions, 23081 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) [2024-06-14 11:39:28,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:28,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:39:28,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:30,418 INFO L124 PetriNetUnfolderBase]: 4086/6852 cut-off events. [2024-06-14 11:39:30,419 INFO L125 PetriNetUnfolderBase]: For 1398873/1398873 co-relation queries the response was YES. [2024-06-14 11:39:30,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68622 conditions, 6852 events. 4086/6852 cut-off events. For 1398873/1398873 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 46921 event pairs, 817 based on Foata normal form. 2/6848 useless extension candidates. Maximal degree in co-relation 68342. Up to 5790 conditions per place. [2024-06-14 11:39:30,546 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 829 selfloop transitions, 227 changer transitions 0/1062 dead transitions. [2024-06-14 11:39:30,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 1062 transitions, 25416 flow [2024-06-14 11:39:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 11:39:30,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 11:39:30,547 INFO L175 Difference]: Start difference. First operand has 639 places, 1039 transitions, 23081 flow. Second operand 8 states and 179 transitions. [2024-06-14 11:39:30,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 1062 transitions, 25416 flow [2024-06-14 11:39:41,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 1062 transitions, 25105 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 11:39:41,523 INFO L231 Difference]: Finished difference. Result has 642 places, 1041 transitions, 23323 flow [2024-06-14 11:39:41,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22770, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23323, PETRI_PLACES=642, PETRI_TRANSITIONS=1041} [2024-06-14 11:39:41,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 600 predicate places. [2024-06-14 11:39:41,524 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 1041 transitions, 23323 flow [2024-06-14 11:39:41,524 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) [2024-06-14 11:39:41,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:41,524 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] [2024-06-14 11:39:41,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 11:39:41,524 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:41,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2002117468, now seen corresponding path program 14 times [2024-06-14 11:39:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269437645] [2024-06-14 11:39:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:41,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:41,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269437645] [2024-06-14 11:39:41,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269437645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:41,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:41,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:41,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486958397] [2024-06-14 11:39:41,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:41,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:41,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:41,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:41,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:41,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:39:41,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1041 transitions, 23323 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) [2024-06-14 11:39:41,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:41,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:39:41,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:44,094 INFO L124 PetriNetUnfolderBase]: 4374/7308 cut-off events. [2024-06-14 11:39:44,094 INFO L125 PetriNetUnfolderBase]: For 1914179/1914179 co-relation queries the response was YES. [2024-06-14 11:39:44,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78615 conditions, 7308 events. 4374/7308 cut-off events. For 1914179/1914179 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 50279 event pairs, 922 based on Foata normal form. 10/7312 useless extension candidates. Maximal degree in co-relation 78334. Up to 5760 conditions per place. [2024-06-14 11:39:44,244 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 852 selfloop transitions, 215 changer transitions 0/1073 dead transitions. [2024-06-14 11:39:44,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 1073 transitions, 26075 flow [2024-06-14 11:39:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:39:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:39:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 11:39:44,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-14 11:39:44,450 INFO L175 Difference]: Start difference. First operand has 642 places, 1041 transitions, 23323 flow. Second operand 10 states and 221 transitions. [2024-06-14 11:39:44,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 1073 transitions, 26075 flow [2024-06-14 11:39:54,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1073 transitions, 25538 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 11:39:54,299 INFO L231 Difference]: Finished difference. Result has 647 places, 1045 transitions, 23389 flow [2024-06-14 11:39:54,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22786, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23389, PETRI_PLACES=647, PETRI_TRANSITIONS=1045} [2024-06-14 11:39:54,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 605 predicate places. [2024-06-14 11:39:54,300 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 1045 transitions, 23389 flow [2024-06-14 11:39:54,300 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) [2024-06-14 11:39:54,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:39:54,300 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] [2024-06-14 11:39:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 11:39:54,300 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:39:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:39:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash 651149812, now seen corresponding path program 15 times [2024-06-14 11:39:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:39:54,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487820842] [2024-06-14 11:39:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:39:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:39:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:39:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:39:54,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:39:54,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487820842] [2024-06-14 11:39:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487820842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:39:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:39:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:39:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457062893] [2024-06-14 11:39:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:39:54,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:39:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:39:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:39:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:39:54,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:39:54,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 1045 transitions, 23389 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) [2024-06-14 11:39:54,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:39:54,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:39:54,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:39:56,843 INFO L124 PetriNetUnfolderBase]: 4382/7328 cut-off events. [2024-06-14 11:39:56,843 INFO L125 PetriNetUnfolderBase]: For 1854405/1854405 co-relation queries the response was YES. [2024-06-14 11:39:56,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79065 conditions, 7328 events. 4382/7328 cut-off events. For 1854405/1854405 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 50500 event pairs, 959 based on Foata normal form. 2/7324 useless extension candidates. Maximal degree in co-relation 78782. Up to 6158 conditions per place. [2024-06-14 11:39:56,985 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 830 selfloop transitions, 236 changer transitions 0/1072 dead transitions. [2024-06-14 11:39:56,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1072 transitions, 25792 flow [2024-06-14 11:39:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:39:56,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:39:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 11:39:56,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 11:39:56,986 INFO L175 Difference]: Start difference. First operand has 647 places, 1045 transitions, 23389 flow. Second operand 8 states and 183 transitions. [2024-06-14 11:39:56,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1072 transitions, 25792 flow [2024-06-14 11:40:07,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 648 places, 1072 transitions, 25457 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 11:40:07,323 INFO L231 Difference]: Finished difference. Result has 649 places, 1047 transitions, 23633 flow [2024-06-14 11:40:07,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23054, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23633, PETRI_PLACES=649, PETRI_TRANSITIONS=1047} [2024-06-14 11:40:07,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 607 predicate places. [2024-06-14 11:40:07,323 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 1047 transitions, 23633 flow [2024-06-14 11:40:07,324 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) [2024-06-14 11:40:07,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:40:07,324 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] [2024-06-14 11:40:07,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 11:40:07,324 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:40:07,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:40:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash -791961854, now seen corresponding path program 16 times [2024-06-14 11:40:07,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:40:07,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230509577] [2024-06-14 11:40:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:40:07,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:40:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:40:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:40:07,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:40:07,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230509577] [2024-06-14 11:40:07,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230509577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:40:07,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:40:07,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:40:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477533185] [2024-06-14 11:40:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:40:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:40:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:40:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:40:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:40:07,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:40:07,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 1047 transitions, 23633 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) [2024-06-14 11:40:07,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:40:07,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:40:07,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:40:09,836 INFO L124 PetriNetUnfolderBase]: 4390/7344 cut-off events. [2024-06-14 11:40:09,836 INFO L125 PetriNetUnfolderBase]: For 1894137/1894137 co-relation queries the response was YES. [2024-06-14 11:40:09,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79440 conditions, 7344 events. 4390/7344 cut-off events. For 1894137/1894137 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 50686 event pairs, 944 based on Foata normal form. 2/7340 useless extension candidates. Maximal degree in co-relation 79155. Up to 6109 conditions per place. [2024-06-14 11:40:09,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 840 selfloop transitions, 226 changer transitions 0/1072 dead transitions. [2024-06-14 11:40:09,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 1072 transitions, 26328 flow [2024-06-14 11:40:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:40:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:40:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 11:40:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:40:10,115 INFO L175 Difference]: Start difference. First operand has 649 places, 1047 transitions, 23633 flow. Second operand 9 states and 198 transitions. [2024-06-14 11:40:10,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 1072 transitions, 26328 flow Killed by 15