./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:36:09,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:36:09,668 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:36:09,673 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:36:09,673 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:36:09,713 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:36:09,713 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:36:09,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:36:09,714 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:36:09,717 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:36:09,717 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:36:09,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:36:09,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:36:09,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:36:09,719 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:36:09,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:36:09,719 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:36:09,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:36:09,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:36:09,720 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:36:09,720 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:36:09,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:36:09,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:36:09,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:36:09,721 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:36:09,721 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:36:09,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:36:09,721 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:36:09,721 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:36:09,722 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:36:09,722 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:36:09,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:36:09,723 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:36:09,723 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:36:09,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:36:09,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:36:09,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:36:09,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:36:09,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:36:09,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:36:09,951 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:36:09,964 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:36:09,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 02:36:10,114 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:36:10,116 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:36:10,117 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:36:11,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:36:11,351 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:36:11,356 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:36:11,371 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54c612e81/5441719012f44bb5a40e0e697914294e/FLAG337371916 [2024-06-28 02:36:11,389 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54c612e81/5441719012f44bb5a40e0e697914294e [2024-06-28 02:36:11,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:36:11,390 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:36:11,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:36:11,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:36:11,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:36:11,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:36:10" (1/2) ... [2024-06-28 02:36:11,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147085d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:36:11, skipping insertion in model container [2024-06-28 02:36:11,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:36:10" (1/2) ... [2024-06-28 02:36:11,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4792ff65 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:36:11, skipping insertion in model container [2024-06-28 02:36:11,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:36:11" (2/2) ... [2024-06-28 02:36:11,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147085d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11, skipping insertion in model container [2024-06-28 02:36:11,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:36:11" (2/2) ... [2024-06-28 02:36:11,402 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:36:11,450 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:36:11,451 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-28 02:36:11,451 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-28 02:36:11,451 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-28 02:36:11,451 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] (((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-28 02:36:11,451 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:36:11,451 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-28 02:36:11,488 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:36:11,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:36:11,737 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:36:11,849 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:36:11,886 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:36:11,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11 WrapperNode [2024-06-28 02:36:11,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:36:11,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:36:11,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:36:11,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:36:11,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,907 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,926 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-28 02:36:11,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:36:11,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:36:11,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:36:11,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:36:11,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,943 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,955 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]. [2024-06-28 02:36:11,960 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,960 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,967 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,969 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,971 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:36:11,972 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:36:11,972 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:36:11,972 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:36:11,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (1/1) ... [2024-06-28 02:36:11,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:36:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:36:11,995 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) [2024-06-28 02:36:12,005 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 [2024-06-28 02:36:12,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:36:12,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:36:12,023 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:36:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:36:12,023 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:36:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:36:12,023 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:36:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:36:12,023 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 02:36:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 02:36:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:36:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:36:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:36:12,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:36:12,025 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:36:12,131 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:36:12,133 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:36:12,424 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:36:12,424 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:36:12,500 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:36:12,500 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:36:12,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:36:12 BoogieIcfgContainer [2024-06-28 02:36:12,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:36:12,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:36:12,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:36:12,505 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:36:12,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:36:10" (1/4) ... [2024-06-28 02:36:12,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5283dba7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:36:12, skipping insertion in model container [2024-06-28 02:36:12,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:36:11" (2/4) ... [2024-06-28 02:36:12,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5283dba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:36:12, skipping insertion in model container [2024-06-28 02:36:12,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:36:11" (3/4) ... [2024-06-28 02:36:12,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5283dba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:36:12, skipping insertion in model container [2024-06-28 02:36:12,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:36:12" (4/4) ... [2024-06-28 02:36:12,511 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:36:12,524 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:36:12,525 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:36:12,525 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:36:12,567 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:36:12,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-28 02:36:12,625 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-28 02:36:12,626 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:36:12,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:36:12,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-28 02:36:12,631 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-28 02:36:12,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:36:12,648 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;@dadd445, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:36:12,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 02:36:12,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:36:12,652 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:36:12,652 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:36:12,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:12,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:36:12,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 233368746, now seen corresponding path program 1 times [2024-06-28 02:36:12,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68045953] [2024-06-28 02:36:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:12,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:13,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68045953] [2024-06-28 02:36:13,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68045953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:13,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:13,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:36:13,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574409222] [2024-06-28 02:36:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:13,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:36:13,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:36:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:36:13,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-06-28 02:36:13,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:13,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:13,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-06-28 02:36:13,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:13,431 INFO L124 PetriNetUnfolderBase]: 1447/2145 cut-off events. [2024-06-28 02:36:13,431 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-28 02:36:13,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2145 events. 1447/2145 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11460 event pairs, 968 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-28 02:36:13,450 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 35 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-28 02:36:13,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 207 flow [2024-06-28 02:36:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:36:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:36:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-28 02:36:13,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2024-06-28 02:36:13,461 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 107 transitions. [2024-06-28 02:36:13,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 207 flow [2024-06-28 02:36:13,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:36:13,468 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-28 02:36:13,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-28 02:36:13,472 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-28 02:36:13,472 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-28 02:36:13,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:13,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:13,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:36:13,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:13,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1102372348, now seen corresponding path program 1 times [2024-06-28 02:36:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:13,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334871343] [2024-06-28 02:36:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:13,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:13,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:13,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334871343] [2024-06-28 02:36:13,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334871343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:13,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:13,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:36:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349916946] [2024-06-28 02:36:13,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:13,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:36:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:13,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:36:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:36:13,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:13,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:13,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:14,034 INFO L124 PetriNetUnfolderBase]: 2467/3605 cut-off events. [2024-06-28 02:36:14,034 INFO L125 PetriNetUnfolderBase]: For 758/966 co-relation queries the response was YES. [2024-06-28 02:36:14,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 3605 events. 2467/3605 cut-off events. For 758/966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19486 event pairs, 1331 based on Foata normal form. 35/3606 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-28 02:36:14,050 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 51 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-06-28 02:36:14,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 309 flow [2024-06-28 02:36:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:36:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:36:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-06-28 02:36:14,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-06-28 02:36:14,052 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 138 transitions. [2024-06-28 02:36:14,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 309 flow [2024-06-28 02:36:14,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:36:14,054 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 152 flow [2024-06-28 02:36:14,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-28 02:36:14,055 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-06-28 02:36:14,055 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 152 flow [2024-06-28 02:36:14,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:14,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:14,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:14,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:36:14,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:14,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1297873024, now seen corresponding path program 1 times [2024-06-28 02:36:14,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:14,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951353420] [2024-06-28 02:36:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:14,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:14,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951353420] [2024-06-28 02:36:14,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951353420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:14,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:14,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:36:14,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904039943] [2024-06-28 02:36:14,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:14,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:36:14,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:14,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:36:14,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:36:14,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:14,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:14,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:14,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:14,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:14,501 INFO L124 PetriNetUnfolderBase]: 2618/4064 cut-off events. [2024-06-28 02:36:14,501 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-28 02:36:14,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9967 conditions, 4064 events. 2618/4064 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23315 event pairs, 1356 based on Foata normal form. 3/4039 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-28 02:36:14,520 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 49 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-28 02:36:14,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 340 flow [2024-06-28 02:36:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:36:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:36:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-28 02:36:14,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-28 02:36:14,525 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 152 flow. Second operand 4 states and 131 transitions. [2024-06-28 02:36:14,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 340 flow [2024-06-28 02:36:14,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 02:36:14,528 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 212 flow [2024-06-28 02:36:14,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-28 02:36:14,529 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-06-28 02:36:14,530 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 212 flow [2024-06-28 02:36:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:14,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:14,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:36:14,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:14,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1969928397, now seen corresponding path program 1 times [2024-06-28 02:36:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:14,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807589715] [2024-06-28 02:36:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:14,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:14,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807589715] [2024-06-28 02:36:14,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807589715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:14,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:14,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:36:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964920726] [2024-06-28 02:36:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:14,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:36:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:36:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:36:14,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:14,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:14,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:14,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:14,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:15,121 INFO L124 PetriNetUnfolderBase]: 2603/4009 cut-off events. [2024-06-28 02:36:15,121 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-28 02:36:15,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11036 conditions, 4009 events. 2603/4009 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22726 event pairs, 1272 based on Foata normal form. 6/3970 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-28 02:36:15,155 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 57 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-28 02:36:15,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 430 flow [2024-06-28 02:36:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-28 02:36:15,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 02:36:15,158 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 212 flow. Second operand 5 states and 161 transitions. [2024-06-28 02:36:15,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 430 flow [2024-06-28 02:36:15,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 426 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 02:36:15,165 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 264 flow [2024-06-28 02:36:15,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-28 02:36:15,167 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-28 02:36:15,167 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 264 flow [2024-06-28 02:36:15,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:15,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:15,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:15,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:36:15,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:15,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1726107371, now seen corresponding path program 1 times [2024-06-28 02:36:15,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:15,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714487798] [2024-06-28 02:36:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:15,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:15,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714487798] [2024-06-28 02:36:15,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714487798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:15,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:15,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:36:15,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575193990] [2024-06-28 02:36:15,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:15,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:36:15,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:36:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:36:15,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:15,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:15,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:15,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:15,812 INFO L124 PetriNetUnfolderBase]: 3372/5076 cut-off events. [2024-06-28 02:36:15,813 INFO L125 PetriNetUnfolderBase]: For 6317/6368 co-relation queries the response was YES. [2024-06-28 02:36:15,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15117 conditions, 5076 events. 3372/5076 cut-off events. For 6317/6368 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28339 event pairs, 1298 based on Foata normal form. 16/5060 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-28 02:36:15,842 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 55 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-28 02:36:15,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 82 transitions, 502 flow [2024-06-28 02:36:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:36:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:36:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-28 02:36:15,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-28 02:36:15,845 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 264 flow. Second operand 4 states and 134 transitions. [2024-06-28 02:36:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 82 transitions, 502 flow [2024-06-28 02:36:15,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:15,853 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 332 flow [2024-06-28 02:36:15,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-28 02:36:15,858 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-28 02:36:15,858 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 332 flow [2024-06-28 02:36:15,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:15,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:15,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:15,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:36:15,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:15,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1725987401, now seen corresponding path program 2 times [2024-06-28 02:36:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:15,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303020169] [2024-06-28 02:36:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:16,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303020169] [2024-06-28 02:36:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303020169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:16,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:36:16,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787752726] [2024-06-28 02:36:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:16,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:36:16,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:36:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:36:16,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:16,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:16,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:16,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:16,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:16,425 INFO L124 PetriNetUnfolderBase]: 3363/5186 cut-off events. [2024-06-28 02:36:16,426 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-28 02:36:16,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 5186 events. 3363/5186 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29818 event pairs, 1431 based on Foata normal form. 18/5167 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-28 02:36:16,451 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 68 selfloop transitions, 20 changer transitions 0/98 dead transitions. [2024-06-28 02:36:16,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 666 flow [2024-06-28 02:36:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-28 02:36:16,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 02:36:16,453 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 332 flow. Second operand 5 states and 161 transitions. [2024-06-28 02:36:16,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 666 flow [2024-06-28 02:36:16,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 98 transitions, 600 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 02:36:16,466 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 447 flow [2024-06-28 02:36:16,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=447, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-06-28 02:36:16,469 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-28 02:36:16,469 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 447 flow [2024-06-28 02:36:16,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:16,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:16,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:16,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:36:16,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:16,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2128335054, now seen corresponding path program 1 times [2024-06-28 02:36:16,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:16,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462111065] [2024-06-28 02:36:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:16,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:16,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462111065] [2024-06-28 02:36:16,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462111065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:16,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:16,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314825134] [2024-06-28 02:36:16,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:16,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:16,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:16,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:16,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:16,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:16,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:16,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:16,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:16,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:17,341 INFO L124 PetriNetUnfolderBase]: 4824/7273 cut-off events. [2024-06-28 02:36:17,342 INFO L125 PetriNetUnfolderBase]: For 18239/18453 co-relation queries the response was YES. [2024-06-28 02:36:17,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25583 conditions, 7273 events. 4824/7273 cut-off events. For 18239/18453 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43898 event pairs, 1097 based on Foata normal form. 104/7308 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-28 02:36:17,396 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 87 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-28 02:36:17,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 945 flow [2024-06-28 02:36:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-06-28 02:36:17,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7074829931972789 [2024-06-28 02:36:17,398 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 447 flow. Second operand 6 states and 208 transitions. [2024-06-28 02:36:17,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 945 flow [2024-06-28 02:36:17,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 131 transitions, 913 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-28 02:36:17,413 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 594 flow [2024-06-28 02:36:17,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=594, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-28 02:36:17,413 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-06-28 02:36:17,413 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 594 flow [2024-06-28 02:36:17,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:17,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:17,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:17,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:36:17,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:17,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1393136916, now seen corresponding path program 2 times [2024-06-28 02:36:17,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:17,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239827316] [2024-06-28 02:36:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:17,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:17,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:17,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239827316] [2024-06-28 02:36:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239827316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:17,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:17,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:17,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257923432] [2024-06-28 02:36:17,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:17,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:17,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:17,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:17,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:17,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:17,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:17,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:18,124 INFO L124 PetriNetUnfolderBase]: 4554/6933 cut-off events. [2024-06-28 02:36:18,124 INFO L125 PetriNetUnfolderBase]: For 24501/24735 co-relation queries the response was YES. [2024-06-28 02:36:18,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26096 conditions, 6933 events. 4554/6933 cut-off events. For 24501/24735 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41859 event pairs, 1415 based on Foata normal form. 122/6980 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-28 02:36:18,171 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 77 selfloop transitions, 29 changer transitions 0/116 dead transitions. [2024-06-28 02:36:18,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 936 flow [2024-06-28 02:36:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-28 02:36:18,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.689795918367347 [2024-06-28 02:36:18,172 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 594 flow. Second operand 5 states and 169 transitions. [2024-06-28 02:36:18,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 936 flow [2024-06-28 02:36:18,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 884 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 02:36:18,203 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 646 flow [2024-06-28 02:36:18,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=646, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-28 02:36:18,204 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-28 02:36:18,204 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 646 flow [2024-06-28 02:36:18,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:18,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:18,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:18,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:36:18,205 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:18,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:18,205 INFO L85 PathProgramCache]: Analyzing trace with hash -816466250, now seen corresponding path program 3 times [2024-06-28 02:36:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:18,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303207762] [2024-06-28 02:36:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:18,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:18,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303207762] [2024-06-28 02:36:18,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303207762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:18,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:18,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:18,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85886798] [2024-06-28 02:36:18,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:18,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:18,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:18,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:18,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:18,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:18,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 646 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:18,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:18,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:18,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:18,959 INFO L124 PetriNetUnfolderBase]: 4631/7073 cut-off events. [2024-06-28 02:36:18,960 INFO L125 PetriNetUnfolderBase]: For 25081/25369 co-relation queries the response was YES. [2024-06-28 02:36:18,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27069 conditions, 7073 events. 4631/7073 cut-off events. For 25081/25369 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42789 event pairs, 1615 based on Foata normal form. 34/7038 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-28 02:36:19,010 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-28 02:36:19,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 996 flow [2024-06-28 02:36:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-28 02:36:19,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-28 02:36:19,012 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 646 flow. Second operand 6 states and 192 transitions. [2024-06-28 02:36:19,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 996 flow [2024-06-28 02:36:19,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 948 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:19,052 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 682 flow [2024-06-28 02:36:19,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-28 02:36:19,052 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-06-28 02:36:19,052 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 682 flow [2024-06-28 02:36:19,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:19,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:19,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:36:19,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:19,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash -816281800, now seen corresponding path program 1 times [2024-06-28 02:36:19,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:19,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826517311] [2024-06-28 02:36:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:19,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:19,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:19,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826517311] [2024-06-28 02:36:19,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826517311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:19,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:19,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:19,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830061658] [2024-06-28 02:36:19,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:19,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:19,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:19,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:19,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:19,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:19,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:19,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:19,780 INFO L124 PetriNetUnfolderBase]: 4592/7016 cut-off events. [2024-06-28 02:36:19,780 INFO L125 PetriNetUnfolderBase]: For 27475/27763 co-relation queries the response was YES. [2024-06-28 02:36:19,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27209 conditions, 7016 events. 4592/7016 cut-off events. For 27475/27763 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42382 event pairs, 1399 based on Foata normal form. 28/6975 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-28 02:36:19,821 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 89 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-28 02:36:19,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1059 flow [2024-06-28 02:36:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:19,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-28 02:36:19,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-28 02:36:19,822 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 682 flow. Second operand 6 states and 194 transitions. [2024-06-28 02:36:19,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1059 flow [2024-06-28 02:36:19,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1005 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 02:36:19,857 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 736 flow [2024-06-28 02:36:19,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-28 02:36:19,858 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-06-28 02:36:19,858 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 736 flow [2024-06-28 02:36:19,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:19,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:19,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:36:19,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:19,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash 176708674, now seen corresponding path program 1 times [2024-06-28 02:36:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:19,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482177288] [2024-06-28 02:36:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482177288] [2024-06-28 02:36:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482177288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:19,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:19,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:36:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683028165] [2024-06-28 02:36:19,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:19,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:36:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:36:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:36:19,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:19,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 736 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:19,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:19,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:19,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:20,423 INFO L124 PetriNetUnfolderBase]: 3701/5678 cut-off events. [2024-06-28 02:36:20,424 INFO L125 PetriNetUnfolderBase]: For 26498/26719 co-relation queries the response was YES. [2024-06-28 02:36:20,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23358 conditions, 5678 events. 3701/5678 cut-off events. For 26498/26719 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33929 event pairs, 1373 based on Foata normal form. 6/5624 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-28 02:36:20,469 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2024-06-28 02:36:20,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 1106 flow [2024-06-28 02:36:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-28 02:36:20,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-28 02:36:20,471 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 736 flow. Second operand 5 states and 158 transitions. [2024-06-28 02:36:20,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 1106 flow [2024-06-28 02:36:20,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1047 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:20,505 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 866 flow [2024-06-28 02:36:20,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-28 02:36:20,506 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-28 02:36:20,506 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 866 flow [2024-06-28 02:36:20,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:20,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:20,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:20,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:36:20,507 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:20,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash 228593815, now seen corresponding path program 1 times [2024-06-28 02:36:20,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:20,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259585754] [2024-06-28 02:36:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:20,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:20,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259585754] [2024-06-28 02:36:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259585754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:20,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:20,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:36:20,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815637987] [2024-06-28 02:36:20,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:20,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:36:20,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:36:20,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:36:20,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:20,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 866 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:20,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:20,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:20,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:21,241 INFO L124 PetriNetUnfolderBase]: 5235/7909 cut-off events. [2024-06-28 02:36:21,241 INFO L125 PetriNetUnfolderBase]: For 41346/41452 co-relation queries the response was YES. [2024-06-28 02:36:21,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31917 conditions, 7909 events. 5235/7909 cut-off events. For 41346/41452 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48386 event pairs, 1971 based on Foata normal form. 12/7763 useless extension candidates. Maximal degree in co-relation 31882. Up to 7087 conditions per place. [2024-06-28 02:36:21,312 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 76 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-28 02:36:21,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 1138 flow [2024-06-28 02:36:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:36:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:36:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-28 02:36:21,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-28 02:36:21,313 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 866 flow. Second operand 4 states and 122 transitions. [2024-06-28 02:36:21,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 1138 flow [2024-06-28 02:36:21,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 1096 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-28 02:36:21,522 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 947 flow [2024-06-28 02:36:21,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=947, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-28 02:36:21,523 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-28 02:36:21,523 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 947 flow [2024-06-28 02:36:21,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:21,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:21,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:36:21,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:21,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash -573087969, now seen corresponding path program 1 times [2024-06-28 02:36:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:21,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199748241] [2024-06-28 02:36:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:21,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:21,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199748241] [2024-06-28 02:36:21,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199748241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:21,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:21,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:36:21,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189494187] [2024-06-28 02:36:21,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:21,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:36:21,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:21,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:36:21,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:36:21,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:21,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 947 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:21,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:21,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:21,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:22,325 INFO L124 PetriNetUnfolderBase]: 4657/7188 cut-off events. [2024-06-28 02:36:22,325 INFO L125 PetriNetUnfolderBase]: For 44422/44823 co-relation queries the response was YES. [2024-06-28 02:36:22,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32052 conditions, 7188 events. 4657/7188 cut-off events. For 44422/44823 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44546 event pairs, 1500 based on Foata normal form. 102/7216 useless extension candidates. Maximal degree in co-relation 32013. Up to 5914 conditions per place. [2024-06-28 02:36:22,379 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 102 selfloop transitions, 32 changer transitions 0/149 dead transitions. [2024-06-28 02:36:22,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 1450 flow [2024-06-28 02:36:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-28 02:36:22,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-28 02:36:22,381 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 947 flow. Second operand 6 states and 194 transitions. [2024-06-28 02:36:22,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 1450 flow [2024-06-28 02:36:22,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 149 transitions, 1446 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 02:36:22,457 INFO L231 Difference]: Finished difference. Result has 98 places, 112 transitions, 1117 flow [2024-06-28 02:36:22,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1117, PETRI_PLACES=98, PETRI_TRANSITIONS=112} [2024-06-28 02:36:22,457 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 46 predicate places. [2024-06-28 02:36:22,457 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 112 transitions, 1117 flow [2024-06-28 02:36:22,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:22,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:22,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:22,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:36:22,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:22,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:22,459 INFO L85 PathProgramCache]: Analyzing trace with hash 547062797, now seen corresponding path program 2 times [2024-06-28 02:36:22,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:22,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072342193] [2024-06-28 02:36:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:22,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072342193] [2024-06-28 02:36:22,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072342193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:22,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:22,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:36:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097804907] [2024-06-28 02:36:22,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:36:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:36:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:36:22,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:22,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 112 transitions, 1117 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:22,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:22,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:22,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:23,178 INFO L124 PetriNetUnfolderBase]: 4558/7078 cut-off events. [2024-06-28 02:36:23,179 INFO L125 PetriNetUnfolderBase]: For 49842/50193 co-relation queries the response was YES. [2024-06-28 02:36:23,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32306 conditions, 7078 events. 4558/7078 cut-off events. For 49842/50193 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44089 event pairs, 1607 based on Foata normal form. 60/7064 useless extension candidates. Maximal degree in co-relation 32263. Up to 6243 conditions per place. [2024-06-28 02:36:23,229 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 100 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-28 02:36:23,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1453 flow [2024-06-28 02:36:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 02:36:23,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-28 02:36:23,231 INFO L175 Difference]: Start difference. First operand has 98 places, 112 transitions, 1117 flow. Second operand 6 states and 187 transitions. [2024-06-28 02:36:23,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1453 flow [2024-06-28 02:36:23,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 141 transitions, 1371 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:23,352 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1095 flow [2024-06-28 02:36:23,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1095, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-28 02:36:23,353 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-06-28 02:36:23,353 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1095 flow [2024-06-28 02:36:23,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:23,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:23,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:23,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:36:23,354 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:23,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1762622183, now seen corresponding path program 1 times [2024-06-28 02:36:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:23,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062595876] [2024-06-28 02:36:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:23,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062595876] [2024-06-28 02:36:23,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062595876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:23,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:23,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:23,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919041957] [2024-06-28 02:36:23,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:23,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:23,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:23,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:23,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1095 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:23,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:23,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:24,108 INFO L124 PetriNetUnfolderBase]: 5399/8107 cut-off events. [2024-06-28 02:36:24,108 INFO L125 PetriNetUnfolderBase]: For 53418/53807 co-relation queries the response was YES. [2024-06-28 02:36:24,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36429 conditions, 8107 events. 5399/8107 cut-off events. For 53418/53807 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49203 event pairs, 1733 based on Foata normal form. 56/8035 useless extension candidates. Maximal degree in co-relation 36385. Up to 7318 conditions per place. [2024-06-28 02:36:24,160 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 87 selfloop transitions, 41 changer transitions 0/140 dead transitions. [2024-06-28 02:36:24,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 140 transitions, 1463 flow [2024-06-28 02:36:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-28 02:36:24,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-06-28 02:36:24,162 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1095 flow. Second operand 5 states and 160 transitions. [2024-06-28 02:36:24,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 140 transitions, 1463 flow [2024-06-28 02:36:24,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 140 transitions, 1407 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 02:36:24,248 INFO L231 Difference]: Finished difference. Result has 102 places, 116 transitions, 1189 flow [2024-06-28 02:36:24,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1189, PETRI_PLACES=102, PETRI_TRANSITIONS=116} [2024-06-28 02:36:24,249 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-28 02:36:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 116 transitions, 1189 flow [2024-06-28 02:36:24,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:24,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:24,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:24,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:36:24,249 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1877913353, now seen corresponding path program 2 times [2024-06-28 02:36:24,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:24,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967808929] [2024-06-28 02:36:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:24,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967808929] [2024-06-28 02:36:24,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967808929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:24,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:24,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203870567] [2024-06-28 02:36:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:24,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:24,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 116 transitions, 1189 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:24,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:24,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:24,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:25,023 INFO L124 PetriNetUnfolderBase]: 5466/8212 cut-off events. [2024-06-28 02:36:25,023 INFO L125 PetriNetUnfolderBase]: For 62280/62845 co-relation queries the response was YES. [2024-06-28 02:36:25,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 8212 events. 5466/8212 cut-off events. For 62280/62845 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49988 event pairs, 1737 based on Foata normal form. 90/8176 useless extension candidates. Maximal degree in co-relation 38808. Up to 7362 conditions per place. [2024-06-28 02:36:25,078 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 93 selfloop transitions, 51 changer transitions 0/156 dead transitions. [2024-06-28 02:36:25,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 156 transitions, 1723 flow [2024-06-28 02:36:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-28 02:36:25,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-28 02:36:25,079 INFO L175 Difference]: Start difference. First operand has 102 places, 116 transitions, 1189 flow. Second operand 6 states and 190 transitions. [2024-06-28 02:36:25,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 156 transitions, 1723 flow [2024-06-28 02:36:25,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1621 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:25,174 INFO L231 Difference]: Finished difference. Result has 105 places, 124 transitions, 1314 flow [2024-06-28 02:36:25,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1314, PETRI_PLACES=105, PETRI_TRANSITIONS=124} [2024-06-28 02:36:25,175 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-06-28 02:36:25,175 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 124 transitions, 1314 flow [2024-06-28 02:36:25,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:25,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:25,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:25,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:36:25,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:25,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:25,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1878182123, now seen corresponding path program 3 times [2024-06-28 02:36:25,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:25,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761214281] [2024-06-28 02:36:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:25,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:25,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:25,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761214281] [2024-06-28 02:36:25,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761214281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:25,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:25,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:25,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227589496] [2024-06-28 02:36:25,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:25,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:25,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:25,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:25,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:25,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 124 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:25,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:25,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:25,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:26,027 INFO L124 PetriNetUnfolderBase]: 5482/8238 cut-off events. [2024-06-28 02:36:26,028 INFO L125 PetriNetUnfolderBase]: For 72752/73320 co-relation queries the response was YES. [2024-06-28 02:36:26,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40964 conditions, 8238 events. 5482/8238 cut-off events. For 72752/73320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50100 event pairs, 1737 based on Foata normal form. 103/8215 useless extension candidates. Maximal degree in co-relation 40918. Up to 7379 conditions per place. [2024-06-28 02:36:26,092 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 91 selfloop transitions, 55 changer transitions 0/158 dead transitions. [2024-06-28 02:36:26,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1806 flow [2024-06-28 02:36:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-28 02:36:26,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-28 02:36:26,093 INFO L175 Difference]: Start difference. First operand has 105 places, 124 transitions, 1314 flow. Second operand 6 states and 188 transitions. [2024-06-28 02:36:26,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1806 flow [2024-06-28 02:36:26,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 158 transitions, 1707 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-28 02:36:26,223 INFO L231 Difference]: Finished difference. Result has 109 places, 128 transitions, 1396 flow [2024-06-28 02:36:26,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1396, PETRI_PLACES=109, PETRI_TRANSITIONS=128} [2024-06-28 02:36:26,223 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-28 02:36:26,224 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 128 transitions, 1396 flow [2024-06-28 02:36:26,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:26,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:26,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:26,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:36:26,224 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:26,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1521738569, now seen corresponding path program 4 times [2024-06-28 02:36:26,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:26,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624887016] [2024-06-28 02:36:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:26,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:26,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:26,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624887016] [2024-06-28 02:36:26,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624887016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:26,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:26,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:36:26,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127135951] [2024-06-28 02:36:26,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:26,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:36:26,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:26,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:36:26,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:36:26,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:26,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:26,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:26,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:26,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:27,152 INFO L124 PetriNetUnfolderBase]: 5440/8168 cut-off events. [2024-06-28 02:36:27,152 INFO L125 PetriNetUnfolderBase]: For 77188/77756 co-relation queries the response was YES. [2024-06-28 02:36:27,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41051 conditions, 8168 events. 5440/8168 cut-off events. For 77188/77756 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49562 event pairs, 1743 based on Foata normal form. 46/8088 useless extension candidates. Maximal degree in co-relation 41003. Up to 7376 conditions per place. [2024-06-28 02:36:27,218 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-06-28 02:36:27,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 154 transitions, 1750 flow [2024-06-28 02:36:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-28 02:36:27,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-28 02:36:27,220 INFO L175 Difference]: Start difference. First operand has 109 places, 128 transitions, 1396 flow. Second operand 5 states and 162 transitions. [2024-06-28 02:36:27,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 154 transitions, 1750 flow [2024-06-28 02:36:27,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 154 transitions, 1595 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:27,400 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1337 flow [2024-06-28 02:36:27,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1337, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2024-06-28 02:36:27,400 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-28 02:36:27,400 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1337 flow [2024-06-28 02:36:27,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:27,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:27,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:27,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:36:27,401 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:27,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:27,401 INFO L85 PathProgramCache]: Analyzing trace with hash 923773174, now seen corresponding path program 1 times [2024-06-28 02:36:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593754185] [2024-06-28 02:36:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:27,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:27,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:27,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593754185] [2024-06-28 02:36:27,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593754185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:27,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:27,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:36:27,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685357567] [2024-06-28 02:36:27,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:27,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:36:27,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:36:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:36:27,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:27,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1337 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:27,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:27,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:27,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:28,222 INFO L124 PetriNetUnfolderBase]: 5397/8145 cut-off events. [2024-06-28 02:36:28,222 INFO L125 PetriNetUnfolderBase]: For 88152/88271 co-relation queries the response was YES. [2024-06-28 02:36:28,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39954 conditions, 8145 events. 5397/8145 cut-off events. For 88152/88271 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50157 event pairs, 1842 based on Foata normal form. 16/7976 useless extension candidates. Maximal degree in co-relation 39905. Up to 7236 conditions per place. [2024-06-28 02:36:28,278 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 87 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-28 02:36:28,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1645 flow [2024-06-28 02:36:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:36:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:36:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-28 02:36:28,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 02:36:28,280 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1337 flow. Second operand 4 states and 126 transitions. [2024-06-28 02:36:28,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1645 flow [2024-06-28 02:36:28,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:28,401 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1350 flow [2024-06-28 02:36:28,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1350, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-28 02:36:28,402 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-28 02:36:28,402 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1350 flow [2024-06-28 02:36:28,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:28,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:28,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:28,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:36:28,403 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:28,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash 635343158, now seen corresponding path program 2 times [2024-06-28 02:36:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:28,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315313980] [2024-06-28 02:36:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:28,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:28,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:28,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315313980] [2024-06-28 02:36:28,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315313980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:28,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:28,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:36:28,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421775450] [2024-06-28 02:36:28,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:28,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:36:28,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:36:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:36:28,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:28,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1350 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:28,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:28,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:28,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:29,138 INFO L124 PetriNetUnfolderBase]: 5381/8142 cut-off events. [2024-06-28 02:36:29,138 INFO L125 PetriNetUnfolderBase]: For 94399/94518 co-relation queries the response was YES. [2024-06-28 02:36:29,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42156 conditions, 8142 events. 5381/8142 cut-off events. For 94399/94518 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50254 event pairs, 1830 based on Foata normal form. 13/7973 useless extension candidates. Maximal degree in co-relation 42106. Up to 7255 conditions per place. [2024-06-28 02:36:29,206 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 97 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-06-28 02:36:29,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1777 flow [2024-06-28 02:36:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-28 02:36:29,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-28 02:36:29,207 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1350 flow. Second operand 5 states and 148 transitions. [2024-06-28 02:36:29,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1777 flow [2024-06-28 02:36:29,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1686 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-28 02:36:29,389 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1524 flow [2024-06-28 02:36:29,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1524, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-28 02:36:29,390 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2024-06-28 02:36:29,390 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1524 flow [2024-06-28 02:36:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:29,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:29,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:29,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:36:29,391 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:29,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 624873590, now seen corresponding path program 1 times [2024-06-28 02:36:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:29,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300493882] [2024-06-28 02:36:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:29,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:29,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300493882] [2024-06-28 02:36:29,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300493882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:29,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:29,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:36:29,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971064547] [2024-06-28 02:36:29,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:36:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:36:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:36:29,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:36:29,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1524 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:29,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:29,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:36:29,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:30,249 INFO L124 PetriNetUnfolderBase]: 5943/8874 cut-off events. [2024-06-28 02:36:30,249 INFO L125 PetriNetUnfolderBase]: For 93352/93352 co-relation queries the response was YES. [2024-06-28 02:36:30,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46602 conditions, 8874 events. 5943/8874 cut-off events. For 93352/93352 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52806 event pairs, 1941 based on Foata normal form. 1/8871 useless extension candidates. Maximal degree in co-relation 46549. Up to 8299 conditions per place. [2024-06-28 02:36:30,311 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 155 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-06-28 02:36:30,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2151 flow [2024-06-28 02:36:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-28 02:36:30,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:36:30,312 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1524 flow. Second operand 5 states and 147 transitions. [2024-06-28 02:36:30,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2151 flow [2024-06-28 02:36:30,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 183 transitions, 2109 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-28 02:36:30,550 INFO L231 Difference]: Finished difference. Result has 122 places, 164 transitions, 1763 flow [2024-06-28 02:36:30,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1763, PETRI_PLACES=122, PETRI_TRANSITIONS=164} [2024-06-28 02:36:30,550 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-06-28 02:36:30,550 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 164 transitions, 1763 flow [2024-06-28 02:36:30,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:30,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:30,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:30,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:36:30,551 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:30,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -974949610, now seen corresponding path program 2 times [2024-06-28 02:36:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104697304] [2024-06-28 02:36:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:30,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104697304] [2024-06-28 02:36:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104697304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:30,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:30,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:36:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895775241] [2024-06-28 02:36:30,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:30,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:36:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:36:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:36:30,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:36:30,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 164 transitions, 1763 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:30,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:30,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:36:30,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:31,395 INFO L124 PetriNetUnfolderBase]: 5939/8865 cut-off events. [2024-06-28 02:36:31,396 INFO L125 PetriNetUnfolderBase]: For 103267/103267 co-relation queries the response was YES. [2024-06-28 02:36:31,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48284 conditions, 8865 events. 5939/8865 cut-off events. For 103267/103267 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52839 event pairs, 1947 based on Foata normal form. 1/8861 useless extension candidates. Maximal degree in co-relation 48226. Up to 8295 conditions per place. [2024-06-28 02:36:31,468 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 148 selfloop transitions, 20 changer transitions 0/177 dead transitions. [2024-06-28 02:36:31,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 177 transitions, 2138 flow [2024-06-28 02:36:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-28 02:36:31,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 02:36:31,469 INFO L175 Difference]: Start difference. First operand has 122 places, 164 transitions, 1763 flow. Second operand 5 states and 140 transitions. [2024-06-28 02:36:31,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 177 transitions, 2138 flow [2024-06-28 02:36:31,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 177 transitions, 2074 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-28 02:36:31,778 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1755 flow [2024-06-28 02:36:31,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1755, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-28 02:36:31,778 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-06-28 02:36:31,778 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1755 flow [2024-06-28 02:36:31,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:31,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:31,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:31,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:36:31,779 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:31,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2048349136, now seen corresponding path program 1 times [2024-06-28 02:36:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953084173] [2024-06-28 02:36:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:31,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953084173] [2024-06-28 02:36:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953084173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:31,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:31,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:36:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97669783] [2024-06-28 02:36:31,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:31,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:36:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:31,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:36:31,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:36:31,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:36:31,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1755 flow. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:31,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:31,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:36:31,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:32,613 INFO L124 PetriNetUnfolderBase]: 5414/8239 cut-off events. [2024-06-28 02:36:32,613 INFO L125 PetriNetUnfolderBase]: For 108088/108097 co-relation queries the response was YES. [2024-06-28 02:36:32,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44974 conditions, 8239 events. 5414/8239 cut-off events. For 108088/108097 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50848 event pairs, 1875 based on Foata normal form. 13/8110 useless extension candidates. Maximal degree in co-relation 44913. Up to 7271 conditions per place. [2024-06-28 02:36:32,681 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 125 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-28 02:36:32,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 181 transitions, 2099 flow [2024-06-28 02:36:32,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 02:36:32,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-28 02:36:32,682 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1755 flow. Second operand 5 states and 146 transitions. [2024-06-28 02:36:32,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 181 transitions, 2099 flow [2024-06-28 02:36:32,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 181 transitions, 2064 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-28 02:36:32,936 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1795 flow [2024-06-28 02:36:32,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1795, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2024-06-28 02:36:32,936 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-28 02:36:32,936 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1795 flow [2024-06-28 02:36:32,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:32,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:32,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:32,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:36:32,937 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:32,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:32,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1511358293, now seen corresponding path program 1 times [2024-06-28 02:36:32,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:32,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508018834] [2024-06-28 02:36:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:32,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:33,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508018834] [2024-06-28 02:36:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508018834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:33,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:33,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:36:33,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775285696] [2024-06-28 02:36:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:33,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:36:33,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:36:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:36:33,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:33,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1795 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:33,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:33,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:33,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:33,784 INFO L124 PetriNetUnfolderBase]: 5639/8539 cut-off events. [2024-06-28 02:36:33,785 INFO L125 PetriNetUnfolderBase]: For 114476/114485 co-relation queries the response was YES. [2024-06-28 02:36:33,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 8539 events. 5639/8539 cut-off events. For 114476/114485 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51993 event pairs, 1938 based on Foata normal form. 7/8503 useless extension candidates. Maximal degree in co-relation 47666. Up to 7745 conditions per place. [2024-06-28 02:36:33,856 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 26 changer transitions 0/191 dead transitions. [2024-06-28 02:36:33,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2274 flow [2024-06-28 02:36:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:36:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:36:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 02:36:33,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2024-06-28 02:36:33,858 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1795 flow. Second operand 5 states and 146 transitions. [2024-06-28 02:36:33,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2274 flow [2024-06-28 02:36:34,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 2225 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:34,187 INFO L231 Difference]: Finished difference. Result has 135 places, 179 transitions, 1959 flow [2024-06-28 02:36:34,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1959, PETRI_PLACES=135, PETRI_TRANSITIONS=179} [2024-06-28 02:36:34,187 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 83 predicate places. [2024-06-28 02:36:34,187 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 179 transitions, 1959 flow [2024-06-28 02:36:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:34,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:34,188 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] [2024-06-28 02:36:34,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:36:34,188 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:34,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 860020480, now seen corresponding path program 1 times [2024-06-28 02:36:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:34,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358647931] [2024-06-28 02:36:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:34,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:34,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358647931] [2024-06-28 02:36:34,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358647931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:34,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:34,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:34,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639567491] [2024-06-28 02:36:34,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:34,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:34,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:34,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:34,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:34,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 179 transitions, 1959 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:34,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:34,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:34,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:35,652 INFO L124 PetriNetUnfolderBase]: 6497/9982 cut-off events. [2024-06-28 02:36:35,652 INFO L125 PetriNetUnfolderBase]: For 173565/174407 co-relation queries the response was YES. [2024-06-28 02:36:35,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60095 conditions, 9982 events. 6497/9982 cut-off events. For 173565/174407 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 64552 event pairs, 1263 based on Foata normal form. 138/9922 useless extension candidates. Maximal degree in co-relation 60029. Up to 5168 conditions per place. [2024-06-28 02:36:35,768 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 157 selfloop transitions, 70 changer transitions 0/243 dead transitions. [2024-06-28 02:36:35,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2933 flow [2024-06-28 02:36:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 235 transitions. [2024-06-28 02:36:35,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685131195335277 [2024-06-28 02:36:35,770 INFO L175 Difference]: Start difference. First operand has 135 places, 179 transitions, 1959 flow. Second operand 7 states and 235 transitions. [2024-06-28 02:36:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2933 flow [2024-06-28 02:36:36,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 243 transitions, 2891 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-28 02:36:36,381 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 2199 flow [2024-06-28 02:36:36,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2024-06-28 02:36:36,381 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 91 predicate places. [2024-06-28 02:36:36,382 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 2199 flow [2024-06-28 02:36:36,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:36,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:36,382 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] [2024-06-28 02:36:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:36:36,382 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:36,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1542602202, now seen corresponding path program 2 times [2024-06-28 02:36:36,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:36,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336080973] [2024-06-28 02:36:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336080973] [2024-06-28 02:36:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336080973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:36,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910261336] [2024-06-28 02:36:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:36,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:36,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:36,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:36,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:36,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:37,703 INFO L124 PetriNetUnfolderBase]: 6392/9844 cut-off events. [2024-06-28 02:36:37,704 INFO L125 PetriNetUnfolderBase]: For 179022/179838 co-relation queries the response was YES. [2024-06-28 02:36:37,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60736 conditions, 9844 events. 6392/9844 cut-off events. For 179022/179838 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 63385 event pairs, 1611 based on Foata normal form. 56/9680 useless extension candidates. Maximal degree in co-relation 60666. Up to 8191 conditions per place. [2024-06-28 02:36:37,803 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 173 selfloop transitions, 33 changer transitions 0/222 dead transitions. [2024-06-28 02:36:37,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2779 flow [2024-06-28 02:36:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-28 02:36:37,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 02:36:37,804 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 2199 flow. Second operand 6 states and 189 transitions. [2024-06-28 02:36:37,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2779 flow [2024-06-28 02:36:38,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 222 transitions, 2699 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 02:36:38,373 INFO L231 Difference]: Finished difference. Result has 147 places, 184 transitions, 2191 flow [2024-06-28 02:36:38,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2191, PETRI_PLACES=147, PETRI_TRANSITIONS=184} [2024-06-28 02:36:38,373 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-28 02:36:38,374 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 184 transitions, 2191 flow [2024-06-28 02:36:38,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:38,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:38,374 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] [2024-06-28 02:36:38,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:36:38,374 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:38,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash 354250122, now seen corresponding path program 3 times [2024-06-28 02:36:38,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:38,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967402550] [2024-06-28 02:36:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:38,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:38,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:38,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967402550] [2024-06-28 02:36:38,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967402550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:38,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:38,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899230912] [2024-06-28 02:36:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:38,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:38,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:38,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:38,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:38,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 184 transitions, 2191 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:38,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:38,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:38,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:39,661 INFO L124 PetriNetUnfolderBase]: 6713/10283 cut-off events. [2024-06-28 02:36:39,661 INFO L125 PetriNetUnfolderBase]: For 200897/201725 co-relation queries the response was YES. [2024-06-28 02:36:39,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63932 conditions, 10283 events. 6713/10283 cut-off events. For 200897/201725 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 66649 event pairs, 1958 based on Foata normal form. 140/10200 useless extension candidates. Maximal degree in co-relation 63860. Up to 6714 conditions per place. [2024-06-28 02:36:39,761 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 151 selfloop transitions, 63 changer transitions 0/230 dead transitions. [2024-06-28 02:36:39,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 230 transitions, 2948 flow [2024-06-28 02:36:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-28 02:36:39,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-28 02:36:39,763 INFO L175 Difference]: Start difference. First operand has 147 places, 184 transitions, 2191 flow. Second operand 6 states and 200 transitions. [2024-06-28 02:36:39,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 230 transitions, 2948 flow [2024-06-28 02:36:40,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 230 transitions, 2874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 02:36:40,378 INFO L231 Difference]: Finished difference. Result has 149 places, 185 transitions, 2281 flow [2024-06-28 02:36:40,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=149, PETRI_TRANSITIONS=185} [2024-06-28 02:36:40,379 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 97 predicate places. [2024-06-28 02:36:40,379 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 185 transitions, 2281 flow [2024-06-28 02:36:40,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:40,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:40,379 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] [2024-06-28 02:36:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:36:40,380 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:40,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1742362790, now seen corresponding path program 4 times [2024-06-28 02:36:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:40,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564491495] [2024-06-28 02:36:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564491495] [2024-06-28 02:36:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564491495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:40,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:40,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:40,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787001777] [2024-06-28 02:36:40,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:40,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:40,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:40,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:40,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 185 transitions, 2281 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:40,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:40,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:40,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:41,663 INFO L124 PetriNetUnfolderBase]: 6561/10073 cut-off events. [2024-06-28 02:36:41,663 INFO L125 PetriNetUnfolderBase]: For 200888/201708 co-relation queries the response was YES. [2024-06-28 02:36:41,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62048 conditions, 10073 events. 6561/10073 cut-off events. For 200888/201708 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 65107 event pairs, 2172 based on Foata normal form. 144/9992 useless extension candidates. Maximal degree in co-relation 61975. Up to 8206 conditions per place. [2024-06-28 02:36:41,760 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 148 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-28 02:36:41,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 219 transitions, 2839 flow [2024-06-28 02:36:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-28 02:36:41,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-28 02:36:41,762 INFO L175 Difference]: Start difference. First operand has 149 places, 185 transitions, 2281 flow. Second operand 6 states and 191 transitions. [2024-06-28 02:36:41,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 219 transitions, 2839 flow [2024-06-28 02:36:42,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 219 transitions, 2683 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:42,525 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 2247 flow [2024-06-28 02:36:42,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2247, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2024-06-28 02:36:42,526 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-28 02:36:42,526 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 2247 flow [2024-06-28 02:36:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:42,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:42,526 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] [2024-06-28 02:36:42,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:36:42,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:42,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash 780887688, now seen corresponding path program 5 times [2024-06-28 02:36:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849534877] [2024-06-28 02:36:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:42,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849534877] [2024-06-28 02:36:42,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849534877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:42,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:42,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:42,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063508815] [2024-06-28 02:36:42,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:42,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:42,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:42,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:42,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:42,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:42,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 2247 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:42,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:42,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:44,058 INFO L124 PetriNetUnfolderBase]: 7231/11115 cut-off events. [2024-06-28 02:36:44,059 INFO L125 PetriNetUnfolderBase]: For 219497/220477 co-relation queries the response was YES. [2024-06-28 02:36:44,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68410 conditions, 11115 events. 7231/11115 cut-off events. For 219497/220477 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 73941 event pairs, 2382 based on Foata normal form. 211/11062 useless extension candidates. Maximal degree in co-relation 68337. Up to 8656 conditions per place. [2024-06-28 02:36:44,196 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 153 selfloop transitions, 68 changer transitions 0/237 dead transitions. [2024-06-28 02:36:44,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 237 transitions, 3043 flow [2024-06-28 02:36:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-28 02:36:44,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-28 02:36:44,198 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 2247 flow. Second operand 7 states and 226 transitions. [2024-06-28 02:36:44,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 237 transitions, 3043 flow [2024-06-28 02:36:44,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 237 transitions, 2900 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 02:36:44,815 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2308 flow [2024-06-28 02:36:44,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2308, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-28 02:36:44,817 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 99 predicate places. [2024-06-28 02:36:44,818 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2308 flow [2024-06-28 02:36:44,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:44,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:44,818 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] [2024-06-28 02:36:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:36:44,818 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:44,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 788506248, now seen corresponding path program 6 times [2024-06-28 02:36:44,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:44,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411254185] [2024-06-28 02:36:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:44,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:44,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411254185] [2024-06-28 02:36:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411254185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:44,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:44,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:44,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934481600] [2024-06-28 02:36:44,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:44,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:44,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:45,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:45,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2308 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:45,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:45,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:45,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:46,225 INFO L124 PetriNetUnfolderBase]: 7522/11556 cut-off events. [2024-06-28 02:36:46,225 INFO L125 PetriNetUnfolderBase]: For 228128/229140 co-relation queries the response was YES. [2024-06-28 02:36:46,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70903 conditions, 11556 events. 7522/11556 cut-off events. For 228128/229140 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 77552 event pairs, 2612 based on Foata normal form. 209/11481 useless extension candidates. Maximal degree in co-relation 70830. Up to 9873 conditions per place. [2024-06-28 02:36:46,326 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 145 selfloop transitions, 66 changer transitions 0/227 dead transitions. [2024-06-28 02:36:46,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 227 transitions, 2906 flow [2024-06-28 02:36:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-06-28 02:36:46,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-28 02:36:46,327 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2308 flow. Second operand 7 states and 217 transitions. [2024-06-28 02:36:46,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 227 transitions, 2906 flow [2024-06-28 02:36:46,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 227 transitions, 2804 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 02:36:46,930 INFO L231 Difference]: Finished difference. Result has 155 places, 188 transitions, 2378 flow [2024-06-28 02:36:46,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2378, PETRI_PLACES=155, PETRI_TRANSITIONS=188} [2024-06-28 02:36:46,930 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 103 predicate places. [2024-06-28 02:36:46,931 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 188 transitions, 2378 flow [2024-06-28 02:36:46,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:46,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:46,931 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] [2024-06-28 02:36:46,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:36:46,931 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:46,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:46,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1046794218, now seen corresponding path program 7 times [2024-06-28 02:36:46,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:46,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958871132] [2024-06-28 02:36:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:46,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958871132] [2024-06-28 02:36:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958871132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:47,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:47,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976978381] [2024-06-28 02:36:47,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:47,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:47,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:47,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 188 transitions, 2378 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:47,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:47,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:47,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:48,330 INFO L124 PetriNetUnfolderBase]: 7890/12100 cut-off events. [2024-06-28 02:36:48,330 INFO L125 PetriNetUnfolderBase]: For 239734/240662 co-relation queries the response was YES. [2024-06-28 02:36:48,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74143 conditions, 12100 events. 7890/12100 cut-off events. For 239734/240662 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 81834 event pairs, 2709 based on Foata normal form. 164/11990 useless extension candidates. Maximal degree in co-relation 74068. Up to 10407 conditions per place. [2024-06-28 02:36:48,452 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 143 selfloop transitions, 67 changer transitions 0/226 dead transitions. [2024-06-28 02:36:48,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 226 transitions, 2974 flow [2024-06-28 02:36:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-28 02:36:48,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268221574344023 [2024-06-28 02:36:48,453 INFO L175 Difference]: Start difference. First operand has 155 places, 188 transitions, 2378 flow. Second operand 7 states and 215 transitions. [2024-06-28 02:36:48,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 226 transitions, 2974 flow [2024-06-28 02:36:49,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 226 transitions, 2838 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:49,169 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2412 flow [2024-06-28 02:36:49,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2412, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2024-06-28 02:36:49,170 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 105 predicate places. [2024-06-28 02:36:49,170 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2412 flow [2024-06-28 02:36:49,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:49,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:49,171 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] [2024-06-28 02:36:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:36:49,171 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:49,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2101922504, now seen corresponding path program 8 times [2024-06-28 02:36:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:49,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559029326] [2024-06-28 02:36:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:49,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:49,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559029326] [2024-06-28 02:36:49,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559029326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:49,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:49,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:49,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860655397] [2024-06-28 02:36:49,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:49,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:49,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:49,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:49,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2412 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:49,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:49,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:49,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:50,606 INFO L124 PetriNetUnfolderBase]: 7788/11900 cut-off events. [2024-06-28 02:36:50,606 INFO L125 PetriNetUnfolderBase]: For 234421/235292 co-relation queries the response was YES. [2024-06-28 02:36:50,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71953 conditions, 11900 events. 7788/11900 cut-off events. For 234421/235292 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 79811 event pairs, 2581 based on Foata normal form. 83/11704 useless extension candidates. Maximal degree in co-relation 71877. Up to 10092 conditions per place. [2024-06-28 02:36:50,732 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 156 selfloop transitions, 55 changer transitions 0/227 dead transitions. [2024-06-28 02:36:50,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2978 flow [2024-06-28 02:36:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:36:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:36:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-28 02:36:50,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-28 02:36:50,733 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2412 flow. Second operand 6 states and 195 transitions. [2024-06-28 02:36:50,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2978 flow [2024-06-28 02:36:51,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2832 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:51,378 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2388 flow [2024-06-28 02:36:51,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2388, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-28 02:36:51,379 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-28 02:36:51,379 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2388 flow [2024-06-28 02:36:51,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:51,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:51,379 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] [2024-06-28 02:36:51,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:36:51,379 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:51,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash 958144138, now seen corresponding path program 1 times [2024-06-28 02:36:51,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:51,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436211579] [2024-06-28 02:36:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:51,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:51,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:51,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436211579] [2024-06-28 02:36:51,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436211579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:51,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004894561] [2024-06-28 02:36:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:51,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:51,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:51,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2388 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:51,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:51,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:51,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:53,219 INFO L124 PetriNetUnfolderBase]: 8261/12723 cut-off events. [2024-06-28 02:36:53,219 INFO L125 PetriNetUnfolderBase]: For 254506/255466 co-relation queries the response was YES. [2024-06-28 02:36:53,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77052 conditions, 12723 events. 8261/12723 cut-off events. For 254506/255466 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 86889 event pairs, 2393 based on Foata normal form. 144/12601 useless extension candidates. Maximal degree in co-relation 76975. Up to 6218 conditions per place. [2024-06-28 02:36:53,335 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 149 selfloop transitions, 82 changer transitions 0/247 dead transitions. [2024-06-28 02:36:53,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 247 transitions, 3270 flow [2024-06-28 02:36:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-28 02:36:53,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705539358600583 [2024-06-28 02:36:53,336 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2388 flow. Second operand 7 states and 230 transitions. [2024-06-28 02:36:53,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 247 transitions, 3270 flow [2024-06-28 02:36:54,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 247 transitions, 3148 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 02:36:54,012 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 2498 flow [2024-06-28 02:36:54,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-28 02:36:54,012 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 108 predicate places. [2024-06-28 02:36:54,012 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 2498 flow [2024-06-28 02:36:54,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:54,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:54,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:36:54,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:36:54,013 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:54,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash 958412908, now seen corresponding path program 2 times [2024-06-28 02:36:54,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:54,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628209480] [2024-06-28 02:36:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:54,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:54,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628209480] [2024-06-28 02:36:54,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628209480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:54,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:54,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:54,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775697308] [2024-06-28 02:36:54,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:54,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:54,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:54,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:54,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:54,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:54,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:55,547 INFO L124 PetriNetUnfolderBase]: 8451/13043 cut-off events. [2024-06-28 02:36:55,547 INFO L125 PetriNetUnfolderBase]: For 273696/274670 co-relation queries the response was YES. [2024-06-28 02:36:55,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79834 conditions, 13043 events. 8451/13043 cut-off events. For 273696/274670 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 89728 event pairs, 2366 based on Foata normal form. 140/12897 useless extension candidates. Maximal degree in co-relation 79756. Up to 6252 conditions per place. [2024-06-28 02:36:55,701 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 147 selfloop transitions, 83 changer transitions 0/246 dead transitions. [2024-06-28 02:36:55,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 246 transitions, 3358 flow [2024-06-28 02:36:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-28 02:36:55,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647230320699709 [2024-06-28 02:36:55,702 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 2498 flow. Second operand 7 states and 228 transitions. [2024-06-28 02:36:55,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 246 transitions, 3358 flow [2024-06-28 02:36:56,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 246 transitions, 3166 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 02:36:56,641 INFO L231 Difference]: Finished difference. Result has 163 places, 192 transitions, 2510 flow [2024-06-28 02:36:56,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2510, PETRI_PLACES=163, PETRI_TRANSITIONS=192} [2024-06-28 02:36:56,642 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-28 02:36:56,642 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 192 transitions, 2510 flow [2024-06-28 02:36:56,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:56,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:56,642 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] [2024-06-28 02:36:56,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:36:56,643 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:56,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:56,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1046978668, now seen corresponding path program 3 times [2024-06-28 02:36:56,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:56,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302737432] [2024-06-28 02:36:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:56,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:56,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:56,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302737432] [2024-06-28 02:36:56,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302737432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:56,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:56,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866001210] [2024-06-28 02:36:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:56,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:56,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:56,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:56,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:56,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 192 transitions, 2510 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:56,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:56,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:56,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:36:58,189 INFO L124 PetriNetUnfolderBase]: 8730/13544 cut-off events. [2024-06-28 02:36:58,189 INFO L125 PetriNetUnfolderBase]: For 289838/290695 co-relation queries the response was YES. [2024-06-28 02:36:58,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82428 conditions, 13544 events. 8730/13544 cut-off events. For 289838/290695 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 94665 event pairs, 3008 based on Foata normal form. 136/13380 useless extension candidates. Maximal degree in co-relation 82349. Up to 10095 conditions per place. [2024-06-28 02:36:58,334 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 150 selfloop transitions, 71 changer transitions 0/237 dead transitions. [2024-06-28 02:36:58,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 237 transitions, 3192 flow [2024-06-28 02:36:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:36:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:36:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-28 02:36:58,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641399416909621 [2024-06-28 02:36:58,336 INFO L175 Difference]: Start difference. First operand has 163 places, 192 transitions, 2510 flow. Second operand 7 states and 220 transitions. [2024-06-28 02:36:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 237 transitions, 3192 flow [2024-06-28 02:36:59,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 3060 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 02:36:59,166 INFO L231 Difference]: Finished difference. Result has 166 places, 193 transitions, 2554 flow [2024-06-28 02:36:59,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2554, PETRI_PLACES=166, PETRI_TRANSITIONS=193} [2024-06-28 02:36:59,166 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-06-28 02:36:59,166 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 193 transitions, 2554 flow [2024-06-28 02:36:59,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:59,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:36:59,167 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] [2024-06-28 02:36:59,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:36:59,167 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:36:59,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:36:59,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2102106954, now seen corresponding path program 4 times [2024-06-28 02:36:59,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:36:59,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514484963] [2024-06-28 02:36:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:36:59,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:36:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:36:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:36:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:36:59,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514484963] [2024-06-28 02:36:59,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514484963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:36:59,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:36:59,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:36:59,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30674247] [2024-06-28 02:36:59,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:36:59,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:36:59,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:36:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:36:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:36:59,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:36:59,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 193 transitions, 2554 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:36:59,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:36:59,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:36:59,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:00,809 INFO L124 PetriNetUnfolderBase]: 8632/13312 cut-off events. [2024-06-28 02:37:00,810 INFO L125 PetriNetUnfolderBase]: For 282764/283633 co-relation queries the response was YES. [2024-06-28 02:37:00,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79764 conditions, 13312 events. 8632/13312 cut-off events. For 282764/283633 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 91715 event pairs, 2422 based on Foata normal form. 75/13051 useless extension candidates. Maximal degree in co-relation 79684. Up to 9827 conditions per place. [2024-06-28 02:37:00,932 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 158 selfloop transitions, 64 changer transitions 0/238 dead transitions. [2024-06-28 02:37:00,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 238 transitions, 3206 flow [2024-06-28 02:37:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-06-28 02:37:00,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-06-28 02:37:00,933 INFO L175 Difference]: Start difference. First operand has 166 places, 193 transitions, 2554 flow. Second operand 6 states and 200 transitions. [2024-06-28 02:37:00,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 238 transitions, 3206 flow [2024-06-28 02:37:01,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 238 transitions, 3052 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:37:01,792 INFO L231 Difference]: Finished difference. Result has 167 places, 193 transitions, 2537 flow [2024-06-28 02:37:01,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=167, PETRI_TRANSITIONS=193} [2024-06-28 02:37:01,793 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 115 predicate places. [2024-06-28 02:37:01,793 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 193 transitions, 2537 flow [2024-06-28 02:37:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:01,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:01,793 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] [2024-06-28 02:37:01,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:37:01,794 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:01,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1325105589, now seen corresponding path program 1 times [2024-06-28 02:37:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:01,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160557842] [2024-06-28 02:37:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:01,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160557842] [2024-06-28 02:37:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160557842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:01,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:01,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080772721] [2024-06-28 02:37:01,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:01,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:01,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 193 transitions, 2537 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:01,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:01,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:01,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:03,628 INFO L124 PetriNetUnfolderBase]: 9585/14477 cut-off events. [2024-06-28 02:37:03,628 INFO L125 PetriNetUnfolderBase]: For 256847/256855 co-relation queries the response was YES. [2024-06-28 02:37:03,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84215 conditions, 14477 events. 9585/14477 cut-off events. For 256847/256855 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97168 event pairs, 3552 based on Foata normal form. 7/14479 useless extension candidates. Maximal degree in co-relation 84134. Up to 13575 conditions per place. [2024-06-28 02:37:03,779 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 39 changer transitions 0/226 dead transitions. [2024-06-28 02:37:03,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 226 transitions, 3249 flow [2024-06-28 02:37:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:37:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:37:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 02:37:03,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2024-06-28 02:37:03,780 INFO L175 Difference]: Start difference. First operand has 167 places, 193 transitions, 2537 flow. Second operand 7 states and 194 transitions. [2024-06-28 02:37:03,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 226 transitions, 3249 flow [2024-06-28 02:37:04,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 226 transitions, 3073 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 02:37:04,513 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2635 flow [2024-06-28 02:37:04,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-28 02:37:04,514 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 117 predicate places. [2024-06-28 02:37:04,514 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2635 flow [2024-06-28 02:37:04,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:04,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:04,514 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] [2024-06-28 02:37:04,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:37:04,515 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:04,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:04,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1325404119, now seen corresponding path program 2 times [2024-06-28 02:37:04,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:04,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138181416] [2024-06-28 02:37:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:04,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:04,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:04,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138181416] [2024-06-28 02:37:04,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138181416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:04,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:04,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205308234] [2024-06-28 02:37:04,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:04,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:04,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:04,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:04,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 2635 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:04,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:04,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:04,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:06,370 INFO L124 PetriNetUnfolderBase]: 9581/14462 cut-off events. [2024-06-28 02:37:06,370 INFO L125 PetriNetUnfolderBase]: For 265078/265096 co-relation queries the response was YES. [2024-06-28 02:37:06,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84993 conditions, 14462 events. 9581/14462 cut-off events. For 265078/265096 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 97058 event pairs, 3566 based on Foata normal form. 17/14470 useless extension candidates. Maximal degree in co-relation 84910. Up to 13571 conditions per place. [2024-06-28 02:37:06,533 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 171 selfloop transitions, 37 changer transitions 0/217 dead transitions. [2024-06-28 02:37:06,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 217 transitions, 3081 flow [2024-06-28 02:37:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:37:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:37:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-28 02:37:06,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-06-28 02:37:06,534 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2635 flow. Second operand 5 states and 143 transitions. [2024-06-28 02:37:06,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 217 transitions, 3081 flow [2024-06-28 02:37:07,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 217 transitions, 2955 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-28 02:37:07,358 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 2595 flow [2024-06-28 02:37:07,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2595, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-28 02:37:07,358 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-28 02:37:07,358 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 2595 flow [2024-06-28 02:37:07,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:07,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:07,359 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] [2024-06-28 02:37:07,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:37:07,359 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:07,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:07,359 INFO L85 PathProgramCache]: Analyzing trace with hash 100814959, now seen corresponding path program 1 times [2024-06-28 02:37:07,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:07,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609278795] [2024-06-28 02:37:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:07,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:07,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:07,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609278795] [2024-06-28 02:37:07,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609278795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:07,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:07,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:07,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107461299] [2024-06-28 02:37:07,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:07,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:07,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:07,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:37:07,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 2595 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:07,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:07,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:37:07,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:09,130 INFO L124 PetriNetUnfolderBase]: 9251/13943 cut-off events. [2024-06-28 02:37:09,131 INFO L125 PetriNetUnfolderBase]: For 310945/311078 co-relation queries the response was YES. [2024-06-28 02:37:09,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83540 conditions, 13943 events. 9251/13943 cut-off events. For 310945/311078 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 94363 event pairs, 3360 based on Foata normal form. 87/13562 useless extension candidates. Maximal degree in co-relation 83455. Up to 12410 conditions per place. [2024-06-28 02:37:09,257 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 130 selfloop transitions, 52 changer transitions 0/226 dead transitions. [2024-06-28 02:37:09,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 226 transitions, 3075 flow [2024-06-28 02:37:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:37:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:37:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-28 02:37:09,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-28 02:37:09,258 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 2595 flow. Second operand 5 states and 155 transitions. [2024-06-28 02:37:09,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 226 transitions, 3075 flow [2024-06-28 02:37:09,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 226 transitions, 2994 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 02:37:09,894 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2678 flow [2024-06-28 02:37:09,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2678, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-28 02:37:09,895 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-28 02:37:09,895 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2678 flow [2024-06-28 02:37:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:09,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:09,895 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] [2024-06-28 02:37:09,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:37:09,896 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:09,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1090773493, now seen corresponding path program 3 times [2024-06-28 02:37:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:09,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747784310] [2024-06-28 02:37:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:09,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747784310] [2024-06-28 02:37:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747784310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:09,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:09,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149907516] [2024-06-28 02:37:09,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:10,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:10,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:10,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2678 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:10,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:10,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:10,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:11,551 INFO L124 PetriNetUnfolderBase]: 9916/14953 cut-off events. [2024-06-28 02:37:11,551 INFO L125 PetriNetUnfolderBase]: For 277080/277088 co-relation queries the response was YES. [2024-06-28 02:37:11,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89497 conditions, 14953 events. 9916/14953 cut-off events. For 277080/277088 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 100565 event pairs, 3607 based on Foata normal form. 7/14953 useless extension candidates. Maximal degree in co-relation 89412. Up to 14020 conditions per place. [2024-06-28 02:37:11,727 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 184 selfloop transitions, 47 changer transitions 0/240 dead transitions. [2024-06-28 02:37:11,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 3430 flow [2024-06-28 02:37:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 02:37:11,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-28 02:37:11,729 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2678 flow. Second operand 6 states and 172 transitions. [2024-06-28 02:37:11,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 3430 flow [2024-06-28 02:37:12,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 3322 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 02:37:12,613 INFO L231 Difference]: Finished difference. Result has 176 places, 220 transitions, 2876 flow [2024-06-28 02:37:12,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2572, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2876, PETRI_PLACES=176, PETRI_TRANSITIONS=220} [2024-06-28 02:37:12,614 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 124 predicate places. [2024-06-28 02:37:12,614 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 220 transitions, 2876 flow [2024-06-28 02:37:12,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:12,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:12,614 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] [2024-06-28 02:37:12,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:37:12,615 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:12,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:12,615 INFO L85 PathProgramCache]: Analyzing trace with hash -118815385, now seen corresponding path program 4 times [2024-06-28 02:37:12,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:12,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299816464] [2024-06-28 02:37:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:12,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299816464] [2024-06-28 02:37:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299816464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:12,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:12,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123414801] [2024-06-28 02:37:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:12,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:12,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:12,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:12,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 220 transitions, 2876 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:12,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:12,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:12,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:14,542 INFO L124 PetriNetUnfolderBase]: 9923/14946 cut-off events. [2024-06-28 02:37:14,542 INFO L125 PetriNetUnfolderBase]: For 280253/280271 co-relation queries the response was YES. [2024-06-28 02:37:14,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89515 conditions, 14946 events. 9923/14946 cut-off events. For 280253/280271 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100262 event pairs, 3628 based on Foata normal form. 17/14954 useless extension candidates. Maximal degree in co-relation 89428. Up to 14028 conditions per place. [2024-06-28 02:37:14,699 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 178 selfloop transitions, 51 changer transitions 0/238 dead transitions. [2024-06-28 02:37:14,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 238 transitions, 3506 flow [2024-06-28 02:37:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 02:37:14,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-28 02:37:14,705 INFO L175 Difference]: Start difference. First operand has 176 places, 220 transitions, 2876 flow. Second operand 6 states and 166 transitions. [2024-06-28 02:37:14,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 238 transitions, 3506 flow [2024-06-28 02:37:15,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 238 transitions, 3412 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-28 02:37:15,546 INFO L231 Difference]: Finished difference. Result has 181 places, 224 transitions, 2963 flow [2024-06-28 02:37:15,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2963, PETRI_PLACES=181, PETRI_TRANSITIONS=224} [2024-06-28 02:37:15,547 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 129 predicate places. [2024-06-28 02:37:15,547 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 224 transitions, 2963 flow [2024-06-28 02:37:15,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:15,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:15,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:37:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:37:15,547 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:15,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 679443797, now seen corresponding path program 5 times [2024-06-28 02:37:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105880122] [2024-06-28 02:37:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:15,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105880122] [2024-06-28 02:37:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105880122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:15,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512549778] [2024-06-28 02:37:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:15,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:15,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 224 transitions, 2963 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:15,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:15,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:15,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:17,242 INFO L124 PetriNetUnfolderBase]: 9919/14945 cut-off events. [2024-06-28 02:37:17,242 INFO L125 PetriNetUnfolderBase]: For 280165/280183 co-relation queries the response was YES. [2024-06-28 02:37:17,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88237 conditions, 14945 events. 9919/14945 cut-off events. For 280165/280183 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100358 event pairs, 3632 based on Foata normal form. 17/14953 useless extension candidates. Maximal degree in co-relation 88147. Up to 14024 conditions per place. [2024-06-28 02:37:17,400 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 177 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-28 02:37:17,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 237 transitions, 3451 flow [2024-06-28 02:37:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:17,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-28 02:37:17,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-28 02:37:17,407 INFO L175 Difference]: Start difference. First operand has 181 places, 224 transitions, 2963 flow. Second operand 6 states and 165 transitions. [2024-06-28 02:37:17,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 237 transitions, 3451 flow [2024-06-28 02:37:18,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 3264 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-28 02:37:18,396 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2885 flow [2024-06-28 02:37:18,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2885, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-28 02:37:18,399 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-06-28 02:37:18,399 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2885 flow [2024-06-28 02:37:18,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:18,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:18,399 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] [2024-06-28 02:37:18,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:37:18,400 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:18,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:18,400 INFO L85 PathProgramCache]: Analyzing trace with hash 679456693, now seen corresponding path program 2 times [2024-06-28 02:37:18,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:18,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209698971] [2024-06-28 02:37:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:18,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:18,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209698971] [2024-06-28 02:37:18,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209698971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:18,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:18,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:18,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965091958] [2024-06-28 02:37:18,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:18,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:18,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:18,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:18,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:18,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:37:18,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2885 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:18,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:18,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:37:18,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:20,117 INFO L124 PetriNetUnfolderBase]: 9365/14121 cut-off events. [2024-06-28 02:37:20,117 INFO L125 PetriNetUnfolderBase]: For 312052/312177 co-relation queries the response was YES. [2024-06-28 02:37:20,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85204 conditions, 14121 events. 9365/14121 cut-off events. For 312052/312177 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 95734 event pairs, 3368 based on Foata normal form. 43/13697 useless extension candidates. Maximal degree in co-relation 85113. Up to 12796 conditions per place. [2024-06-28 02:37:20,264 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 153 selfloop transitions, 38 changer transitions 0/243 dead transitions. [2024-06-28 02:37:20,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 243 transitions, 3355 flow [2024-06-28 02:37:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-28 02:37:20,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-28 02:37:20,266 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2885 flow. Second operand 6 states and 174 transitions. [2024-06-28 02:37:20,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 243 transitions, 3355 flow [2024-06-28 02:37:21,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 243 transitions, 3207 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 02:37:21,183 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 2848 flow [2024-06-28 02:37:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2848, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-28 02:37:21,184 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 133 predicate places. [2024-06-28 02:37:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 2848 flow [2024-06-28 02:37:21,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:21,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:21,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:37:21,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:37:21,184 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:21,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1368517167, now seen corresponding path program 3 times [2024-06-28 02:37:21,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:21,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180678677] [2024-06-28 02:37:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:21,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:21,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180678677] [2024-06-28 02:37:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180678677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:21,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:21,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128890563] [2024-06-28 02:37:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:21,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:21,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:21,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:37:21,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 2848 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:21,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:21,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:37:21,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:22,899 INFO L124 PetriNetUnfolderBase]: 9373/14125 cut-off events. [2024-06-28 02:37:22,899 INFO L125 PetriNetUnfolderBase]: For 319277/319390 co-relation queries the response was YES. [2024-06-28 02:37:23,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86240 conditions, 14125 events. 9373/14125 cut-off events. For 319277/319390 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95515 event pairs, 3340 based on Foata normal form. 41/13705 useless extension candidates. Maximal degree in co-relation 86149. Up to 12680 conditions per place. [2024-06-28 02:37:23,069 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 154 selfloop transitions, 43 changer transitions 0/249 dead transitions. [2024-06-28 02:37:23,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 249 transitions, 3368 flow [2024-06-28 02:37:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 02:37:23,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-28 02:37:23,070 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 2848 flow. Second operand 6 states and 176 transitions. [2024-06-28 02:37:23,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 249 transitions, 3368 flow [2024-06-28 02:37:24,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 249 transitions, 3287 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 02:37:24,091 INFO L231 Difference]: Finished difference. Result has 188 places, 229 transitions, 2921 flow [2024-06-28 02:37:24,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2921, PETRI_PLACES=188, PETRI_TRANSITIONS=229} [2024-06-28 02:37:24,091 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-28 02:37:24,092 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 229 transitions, 2921 flow [2024-06-28 02:37:24,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:24,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:24,092 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] [2024-06-28 02:37:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:37:24,093 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:24,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash -800445355, now seen corresponding path program 1 times [2024-06-28 02:37:24,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:24,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377706889] [2024-06-28 02:37:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:24,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:24,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:24,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377706889] [2024-06-28 02:37:24,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377706889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:24,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:24,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:24,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906169058] [2024-06-28 02:37:24,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:24,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:24,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 229 transitions, 2921 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:24,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:24,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:24,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:26,017 INFO L124 PetriNetUnfolderBase]: 10126/15244 cut-off events. [2024-06-28 02:37:26,017 INFO L125 PetriNetUnfolderBase]: For 326226/326226 co-relation queries the response was YES. [2024-06-28 02:37:26,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92937 conditions, 15244 events. 10126/15244 cut-off events. For 326226/326226 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 102433 event pairs, 3653 based on Foata normal form. 6/15246 useless extension candidates. Maximal degree in co-relation 92844. Up to 14266 conditions per place. [2024-06-28 02:37:26,205 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 234 selfloop transitions, 25 changer transitions 0/268 dead transitions. [2024-06-28 02:37:26,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 268 transitions, 3724 flow [2024-06-28 02:37:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 02:37:26,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-28 02:37:26,206 INFO L175 Difference]: Start difference. First operand has 188 places, 229 transitions, 2921 flow. Second operand 6 states and 179 transitions. [2024-06-28 02:37:26,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 268 transitions, 3724 flow [2024-06-28 02:37:27,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 268 transitions, 3640 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 02:37:27,580 INFO L231 Difference]: Finished difference. Result has 192 places, 235 transitions, 3006 flow [2024-06-28 02:37:27,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3006, PETRI_PLACES=192, PETRI_TRANSITIONS=235} [2024-06-28 02:37:27,580 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 140 predicate places. [2024-06-28 02:37:27,580 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 235 transitions, 3006 flow [2024-06-28 02:37:27,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:27,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:27,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:37:27,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:37:27,581 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:27,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:27,581 INFO L85 PathProgramCache]: Analyzing trace with hash -791874475, now seen corresponding path program 2 times [2024-06-28 02:37:27,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:27,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200083566] [2024-06-28 02:37:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:27,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:27,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:27,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200083566] [2024-06-28 02:37:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200083566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:27,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480585997] [2024-06-28 02:37:27,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:27,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:27,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:27,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:27,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 235 transitions, 3006 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:27,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:27,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:27,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:29,536 INFO L124 PetriNetUnfolderBase]: 10170/15304 cut-off events. [2024-06-28 02:37:29,536 INFO L125 PetriNetUnfolderBase]: For 342513/342513 co-relation queries the response was YES. [2024-06-28 02:37:29,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94056 conditions, 15304 events. 10170/15304 cut-off events. For 342513/342513 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 102982 event pairs, 3644 based on Foata normal form. 8/15308 useless extension candidates. Maximal degree in co-relation 93961. Up to 14402 conditions per place. [2024-06-28 02:37:29,854 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 229 selfloop transitions, 22 changer transitions 0/260 dead transitions. [2024-06-28 02:37:29,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 260 transitions, 3626 flow [2024-06-28 02:37:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-28 02:37:29,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-28 02:37:29,856 INFO L175 Difference]: Start difference. First operand has 192 places, 235 transitions, 3006 flow. Second operand 6 states and 170 transitions. [2024-06-28 02:37:29,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 260 transitions, 3626 flow [2024-06-28 02:37:31,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 260 transitions, 3569 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 02:37:31,482 INFO L231 Difference]: Finished difference. Result has 196 places, 237 transitions, 3041 flow [2024-06-28 02:37:31,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3041, PETRI_PLACES=196, PETRI_TRANSITIONS=237} [2024-06-28 02:37:31,482 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-28 02:37:31,483 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 237 transitions, 3041 flow [2024-06-28 02:37:31,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:31,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:31,483 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] [2024-06-28 02:37:31,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:37:31,483 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:31,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:31,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1090577015, now seen corresponding path program 1 times [2024-06-28 02:37:31,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:31,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466358422] [2024-06-28 02:37:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:31,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:31,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:31,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466358422] [2024-06-28 02:37:31,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466358422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:31,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:31,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:31,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612925181] [2024-06-28 02:37:31,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:31,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:31,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:31,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 237 transitions, 3041 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:31,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:31,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:33,266 INFO L124 PetriNetUnfolderBase]: 10188/15329 cut-off events. [2024-06-28 02:37:33,266 INFO L125 PetriNetUnfolderBase]: For 348889/348893 co-relation queries the response was YES. [2024-06-28 02:37:33,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94445 conditions, 15329 events. 10188/15329 cut-off events. For 348889/348893 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103042 event pairs, 3619 based on Foata normal form. 5/15329 useless extension candidates. Maximal degree in co-relation 94348. Up to 14410 conditions per place. [2024-06-28 02:37:33,456 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-28 02:37:33,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 4013 flow [2024-06-28 02:37:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 02:37:33,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-28 02:37:33,482 INFO L175 Difference]: Start difference. First operand has 196 places, 237 transitions, 3041 flow. Second operand 6 states and 176 transitions. [2024-06-28 02:37:33,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 4013 flow [2024-06-28 02:37:35,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 3963 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 02:37:35,022 INFO L231 Difference]: Finished difference. Result has 200 places, 252 transitions, 3326 flow [2024-06-28 02:37:35,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3326, PETRI_PLACES=200, PETRI_TRANSITIONS=252} [2024-06-28 02:37:35,023 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 148 predicate places. [2024-06-28 02:37:35,023 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 252 transitions, 3326 flow [2024-06-28 02:37:35,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:35,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:35,024 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] [2024-06-28 02:37:35,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:37:35,024 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:35,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1090784405, now seen corresponding path program 2 times [2024-06-28 02:37:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:35,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147581544] [2024-06-28 02:37:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:35,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:35,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:35,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147581544] [2024-06-28 02:37:35,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147581544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:35,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:35,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509322214] [2024-06-28 02:37:35,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:35,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:35,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:35,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:35,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 252 transitions, 3326 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:35,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:35,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:35,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:37,163 INFO L124 PetriNetUnfolderBase]: 10206/15364 cut-off events. [2024-06-28 02:37:37,163 INFO L125 PetriNetUnfolderBase]: For 374233/374237 co-relation queries the response was YES. [2024-06-28 02:37:37,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97423 conditions, 15364 events. 10206/15364 cut-off events. For 374233/374237 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103477 event pairs, 3624 based on Foata normal form. 5/15364 useless extension candidates. Maximal degree in co-relation 97323. Up to 14430 conditions per place. [2024-06-28 02:37:37,326 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 226 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2024-06-28 02:37:37,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 282 transitions, 4233 flow [2024-06-28 02:37:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 02:37:37,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-28 02:37:37,327 INFO L175 Difference]: Start difference. First operand has 200 places, 252 transitions, 3326 flow. Second operand 6 states and 173 transitions. [2024-06-28 02:37:37,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 282 transitions, 4233 flow [2024-06-28 02:37:38,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 282 transitions, 4116 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-28 02:37:38,654 INFO L231 Difference]: Finished difference. Result has 206 places, 261 transitions, 3483 flow [2024-06-28 02:37:38,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3483, PETRI_PLACES=206, PETRI_TRANSITIONS=261} [2024-06-28 02:37:38,655 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-28 02:37:38,655 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 261 transitions, 3483 flow [2024-06-28 02:37:38,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:38,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:38,655 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] [2024-06-28 02:37:38,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:37:38,655 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:38,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1227032649, now seen corresponding path program 3 times [2024-06-28 02:37:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169065417] [2024-06-28 02:37:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:38,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:38,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169065417] [2024-06-28 02:37:38,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169065417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:38,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:38,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:38,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661066837] [2024-06-28 02:37:38,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:38,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:38,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:38,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:38,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:38,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 261 transitions, 3483 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:38,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:38,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:38,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:40,631 INFO L124 PetriNetUnfolderBase]: 10180/15326 cut-off events. [2024-06-28 02:37:40,631 INFO L125 PetriNetUnfolderBase]: For 385388/385388 co-relation queries the response was YES. [2024-06-28 02:37:40,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97265 conditions, 15326 events. 10180/15326 cut-off events. For 385388/385388 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103174 event pairs, 3617 based on Foata normal form. 8/15329 useless extension candidates. Maximal degree in co-relation 97162. Up to 14414 conditions per place. [2024-06-28 02:37:40,814 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 248 selfloop transitions, 22 changer transitions 0/279 dead transitions. [2024-06-28 02:37:40,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 279 transitions, 4104 flow [2024-06-28 02:37:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-28 02:37:40,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-28 02:37:40,815 INFO L175 Difference]: Start difference. First operand has 206 places, 261 transitions, 3483 flow. Second operand 6 states and 164 transitions. [2024-06-28 02:37:40,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 279 transitions, 4104 flow [2024-06-28 02:37:42,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 279 transitions, 4014 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 02:37:42,586 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 3458 flow [2024-06-28 02:37:42,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-28 02:37:42,587 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2024-06-28 02:37:42,587 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 3458 flow [2024-06-28 02:37:42,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:42,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:42,588 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] [2024-06-28 02:37:42,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:37:42,588 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:42,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2035623001, now seen corresponding path program 3 times [2024-06-28 02:37:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:42,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100617318] [2024-06-28 02:37:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:42,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:42,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100617318] [2024-06-28 02:37:42,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100617318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:42,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928527022] [2024-06-28 02:37:42,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:42,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:42,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:42,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:42,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 3458 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:42,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:42,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:42,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:44,673 INFO L124 PetriNetUnfolderBase]: 10176/15325 cut-off events. [2024-06-28 02:37:44,674 INFO L125 PetriNetUnfolderBase]: For 390460/390464 co-relation queries the response was YES. [2024-06-28 02:37:44,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97397 conditions, 15325 events. 10176/15325 cut-off events. For 390460/390464 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103216 event pairs, 3616 based on Foata normal form. 5/15325 useless extension candidates. Maximal degree in co-relation 97293. Up to 14411 conditions per place. [2024-06-28 02:37:44,851 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 237 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-28 02:37:44,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 281 transitions, 4134 flow [2024-06-28 02:37:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:37:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:37:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 02:37:44,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-28 02:37:44,853 INFO L175 Difference]: Start difference. First operand has 210 places, 262 transitions, 3458 flow. Second operand 5 states and 150 transitions. [2024-06-28 02:37:44,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 281 transitions, 4134 flow [2024-06-28 02:37:46,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 281 transitions, 4060 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 02:37:46,813 INFO L231 Difference]: Finished difference. Result has 211 places, 262 transitions, 3466 flow [2024-06-28 02:37:46,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3466, PETRI_PLACES=211, PETRI_TRANSITIONS=262} [2024-06-28 02:37:46,813 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 159 predicate places. [2024-06-28 02:37:46,814 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 262 transitions, 3466 flow [2024-06-28 02:37:46,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:46,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:46,814 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] [2024-06-28 02:37:46,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:37:46,814 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -346065129, now seen corresponding path program 4 times [2024-06-28 02:37:46,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:46,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330645551] [2024-06-28 02:37:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:46,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:46,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:46,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330645551] [2024-06-28 02:37:46,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330645551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:46,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:46,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:46,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697676842] [2024-06-28 02:37:46,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:46,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:46,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:46,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:46,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:46,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:46,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 262 transitions, 3466 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:46,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:46,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:46,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:48,783 INFO L124 PetriNetUnfolderBase]: 10172/15322 cut-off events. [2024-06-28 02:37:48,783 INFO L125 PetriNetUnfolderBase]: For 401214/401218 co-relation queries the response was YES. [2024-06-28 02:37:48,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97564 conditions, 15322 events. 10172/15322 cut-off events. For 401214/401218 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103171 event pairs, 3614 based on Foata normal form. 5/15324 useless extension candidates. Maximal degree in co-relation 97459. Up to 14407 conditions per place. [2024-06-28 02:37:48,996 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 236 selfloop transitions, 39 changer transitions 0/284 dead transitions. [2024-06-28 02:37:48,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 284 transitions, 4100 flow [2024-06-28 02:37:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:37:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:37:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-28 02:37:48,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626822157434402 [2024-06-28 02:37:48,997 INFO L175 Difference]: Start difference. First operand has 211 places, 262 transitions, 3466 flow. Second operand 7 states and 193 transitions. [2024-06-28 02:37:48,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 284 transitions, 4100 flow [2024-06-28 02:37:51,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 284 transitions, 3979 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:37:51,237 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 3469 flow [2024-06-28 02:37:51,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3361, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3469, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-28 02:37:51,238 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 162 predicate places. [2024-06-28 02:37:51,238 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 3469 flow [2024-06-28 02:37:51,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:51,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:51,239 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] [2024-06-28 02:37:51,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:37:51,239 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:51,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:51,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1356135023, now seen corresponding path program 5 times [2024-06-28 02:37:51,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:51,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637251450] [2024-06-28 02:37:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:51,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637251450] [2024-06-28 02:37:51,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637251450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:51,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:51,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615724587] [2024-06-28 02:37:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:51,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:51,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:51,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 3469 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:51,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:51,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:51,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:53,107 INFO L124 PetriNetUnfolderBase]: 10168/15312 cut-off events. [2024-06-28 02:37:53,107 INFO L125 PetriNetUnfolderBase]: For 413061/413065 co-relation queries the response was YES. [2024-06-28 02:37:53,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97739 conditions, 15312 events. 10168/15312 cut-off events. For 413061/413065 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 103114 event pairs, 3629 based on Foata normal form. 5/15312 useless extension candidates. Maximal degree in co-relation 97633. Up to 14384 conditions per place. [2024-06-28 02:37:53,298 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 219 selfloop transitions, 51 changer transitions 0/279 dead transitions. [2024-06-28 02:37:53,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 279 transitions, 4067 flow [2024-06-28 02:37:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-28 02:37:53,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-28 02:37:53,299 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 3469 flow. Second operand 6 states and 165 transitions. [2024-06-28 02:37:53,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 279 transitions, 4067 flow [2024-06-28 02:37:55,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 279 transitions, 3951 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:37:55,301 INFO L231 Difference]: Finished difference. Result has 215 places, 266 transitions, 3488 flow [2024-06-28 02:37:55,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3488, PETRI_PLACES=215, PETRI_TRANSITIONS=266} [2024-06-28 02:37:55,301 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 163 predicate places. [2024-06-28 02:37:55,301 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 266 transitions, 3488 flow [2024-06-28 02:37:55,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:55,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:55,302 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] [2024-06-28 02:37:55,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:37:55,302 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:55,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1368523119, now seen corresponding path program 1 times [2024-06-28 02:37:55,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:55,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327000317] [2024-06-28 02:37:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:55,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:55,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327000317] [2024-06-28 02:37:55,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327000317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:55,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:55,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:37:55,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409834531] [2024-06-28 02:37:55,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:55,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:37:55,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:55,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:37:55,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:37:55,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:55,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 266 transitions, 3488 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:55,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:55,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:55,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:37:57,226 INFO L124 PetriNetUnfolderBase]: 10149/15274 cut-off events. [2024-06-28 02:37:57,226 INFO L125 PetriNetUnfolderBase]: For 423908/423908 co-relation queries the response was YES. [2024-06-28 02:37:57,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97556 conditions, 15274 events. 10149/15274 cut-off events. For 423908/423908 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 102660 event pairs, 3591 based on Foata normal form. 6/15275 useless extension candidates. Maximal degree in co-relation 97449. Up to 14312 conditions per place. [2024-06-28 02:37:57,430 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 254 selfloop transitions, 28 changer transitions 0/291 dead transitions. [2024-06-28 02:37:57,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 291 transitions, 4222 flow [2024-06-28 02:37:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:37:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:37:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-28 02:37:57,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-28 02:37:57,431 INFO L175 Difference]: Start difference. First operand has 215 places, 266 transitions, 3488 flow. Second operand 6 states and 166 transitions. [2024-06-28 02:37:57,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 291 transitions, 4222 flow [2024-06-28 02:37:59,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 291 transitions, 4136 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:37:59,493 INFO L231 Difference]: Finished difference. Result has 219 places, 271 transitions, 3563 flow [2024-06-28 02:37:59,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3563, PETRI_PLACES=219, PETRI_TRANSITIONS=271} [2024-06-28 02:37:59,494 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 167 predicate places. [2024-06-28 02:37:59,494 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 271 transitions, 3563 flow [2024-06-28 02:37:59,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:59,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:37:59,494 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] [2024-06-28 02:37:59,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:37:59,495 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:37:59,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:37:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1284841095, now seen corresponding path program 1 times [2024-06-28 02:37:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:37:59,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658258346] [2024-06-28 02:37:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:37:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:37:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:37:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:37:59,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:37:59,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658258346] [2024-06-28 02:37:59,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658258346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:37:59,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:37:59,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:37:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208873275] [2024-06-28 02:37:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:37:59,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:37:59,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:37:59,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:37:59,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:37:59,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:37:59,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 271 transitions, 3563 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:37:59,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:37:59,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:37:59,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:01,631 INFO L124 PetriNetUnfolderBase]: 10350/15583 cut-off events. [2024-06-28 02:38:01,631 INFO L125 PetriNetUnfolderBase]: For 452145/452152 co-relation queries the response was YES. [2024-06-28 02:38:01,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100972 conditions, 15583 events. 10350/15583 cut-off events. For 452145/452152 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 105042 event pairs, 3641 based on Foata normal form. 7/15582 useless extension candidates. Maximal degree in co-relation 100862. Up to 14377 conditions per place. [2024-06-28 02:38:01,841 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 206 selfloop transitions, 110 changer transitions 0/325 dead transitions. [2024-06-28 02:38:01,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 325 transitions, 4881 flow [2024-06-28 02:38:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:38:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:38:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-28 02:38:01,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-28 02:38:01,842 INFO L175 Difference]: Start difference. First operand has 219 places, 271 transitions, 3563 flow. Second operand 6 states and 184 transitions. [2024-06-28 02:38:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 325 transitions, 4881 flow [2024-06-28 02:38:04,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 4824 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 02:38:04,567 INFO L231 Difference]: Finished difference. Result has 224 places, 303 transitions, 4369 flow [2024-06-28 02:38:04,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4369, PETRI_PLACES=224, PETRI_TRANSITIONS=303} [2024-06-28 02:38:04,567 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 172 predicate places. [2024-06-28 02:38:04,567 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 303 transitions, 4369 flow [2024-06-28 02:38:04,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:04,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:04,568 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] [2024-06-28 02:38:04,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:38:04,568 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:04,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash -688533393, now seen corresponding path program 2 times [2024-06-28 02:38:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:04,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342869680] [2024-06-28 02:38:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:04,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:04,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:04,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342869680] [2024-06-28 02:38:04,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342869680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:04,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:04,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:04,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252800118] [2024-06-28 02:38:04,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:04,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:04,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:04,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:04,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 303 transitions, 4369 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:04,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:04,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:04,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:07,058 INFO L124 PetriNetUnfolderBase]: 10326/15553 cut-off events. [2024-06-28 02:38:07,059 INFO L125 PetriNetUnfolderBase]: For 488836/488843 co-relation queries the response was YES. [2024-06-28 02:38:07,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106145 conditions, 15553 events. 10326/15553 cut-off events. For 488836/488843 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 104893 event pairs, 3641 based on Foata normal form. 7/15552 useless extension candidates. Maximal degree in co-relation 106032. Up to 14353 conditions per place. [2024-06-28 02:38:07,260 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 206 selfloop transitions, 112 changer transitions 0/327 dead transitions. [2024-06-28 02:38:07,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 327 transitions, 5143 flow [2024-06-28 02:38:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:38:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:38:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 02:38:07,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064139941690962 [2024-06-28 02:38:07,261 INFO L175 Difference]: Start difference. First operand has 224 places, 303 transitions, 4369 flow. Second operand 7 states and 208 transitions. [2024-06-28 02:38:07,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 327 transitions, 5143 flow [2024-06-28 02:38:09,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4886 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-28 02:38:09,998 INFO L231 Difference]: Finished difference. Result has 228 places, 305 transitions, 4404 flow [2024-06-28 02:38:09,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4404, PETRI_PLACES=228, PETRI_TRANSITIONS=305} [2024-06-28 02:38:09,999 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-28 02:38:09,999 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 4404 flow [2024-06-28 02:38:09,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:09,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:09,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:38:10,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:38:10,000 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:10,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash -688981839, now seen corresponding path program 1 times [2024-06-28 02:38:10,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:10,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045656394] [2024-06-28 02:38:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:10,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:10,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:10,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045656394] [2024-06-28 02:38:10,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045656394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:10,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:10,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119526640] [2024-06-28 02:38:10,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:10,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:10,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:10,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:10,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:10,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:38:10,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 4404 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:10,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:10,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:38:10,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:13,207 INFO L124 PetriNetUnfolderBase]: 10329/15599 cut-off events. [2024-06-28 02:38:13,207 INFO L125 PetriNetUnfolderBase]: For 514373/514384 co-relation queries the response was YES. [2024-06-28 02:38:13,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104881 conditions, 15599 events. 10329/15599 cut-off events. For 514373/514384 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 105792 event pairs, 2856 based on Foata normal form. 56/15440 useless extension candidates. Maximal degree in co-relation 104767. Up to 13471 conditions per place. [2024-06-28 02:38:13,397 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 242 selfloop transitions, 66 changer transitions 0/351 dead transitions. [2024-06-28 02:38:13,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 351 transitions, 5402 flow [2024-06-28 02:38:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:38:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:38:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-28 02:38:13,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-28 02:38:13,398 INFO L175 Difference]: Start difference. First operand has 228 places, 305 transitions, 4404 flow. Second operand 6 states and 190 transitions. [2024-06-28 02:38:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 351 transitions, 5402 flow [2024-06-28 02:38:15,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 351 transitions, 5128 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 02:38:15,318 INFO L231 Difference]: Finished difference. Result has 228 places, 316 transitions, 4466 flow [2024-06-28 02:38:15,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4466, PETRI_PLACES=228, PETRI_TRANSITIONS=316} [2024-06-28 02:38:15,319 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 176 predicate places. [2024-06-28 02:38:15,319 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 316 transitions, 4466 flow [2024-06-28 02:38:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:15,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:15,319 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] [2024-06-28 02:38:15,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:38:15,320 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:15,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2034087527, now seen corresponding path program 3 times [2024-06-28 02:38:15,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:15,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161825121] [2024-06-28 02:38:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:15,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161825121] [2024-06-28 02:38:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161825121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:15,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150761203] [2024-06-28 02:38:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:15,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:15,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:15,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 316 transitions, 4466 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:15,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:15,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:15,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:17,981 INFO L124 PetriNetUnfolderBase]: 10655/16071 cut-off events. [2024-06-28 02:38:17,982 INFO L125 PetriNetUnfolderBase]: For 466791/466794 co-relation queries the response was YES. [2024-06-28 02:38:18,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108939 conditions, 16071 events. 10655/16071 cut-off events. For 466791/466794 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 108877 event pairs, 3696 based on Foata normal form. 1/16065 useless extension candidates. Maximal degree in co-relation 108825. Up to 14957 conditions per place. [2024-06-28 02:38:18,166 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 277 selfloop transitions, 77 changer transitions 0/363 dead transitions. [2024-06-28 02:38:18,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 363 transitions, 5639 flow [2024-06-28 02:38:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:38:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:38:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-28 02:38:18,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5600907029478458 [2024-06-28 02:38:18,168 INFO L175 Difference]: Start difference. First operand has 228 places, 316 transitions, 4466 flow. Second operand 9 states and 247 transitions. [2024-06-28 02:38:18,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 363 transitions, 5639 flow [2024-06-28 02:38:20,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 363 transitions, 5549 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 02:38:20,626 INFO L231 Difference]: Finished difference. Result has 237 places, 334 transitions, 4913 flow [2024-06-28 02:38:20,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4913, PETRI_PLACES=237, PETRI_TRANSITIONS=334} [2024-06-28 02:38:20,626 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2024-06-28 02:38:20,627 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 334 transitions, 4913 flow [2024-06-28 02:38:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:20,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:20,627 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] [2024-06-28 02:38:20,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:38:20,627 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:20,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:20,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1947195419, now seen corresponding path program 4 times [2024-06-28 02:38:20,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:20,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105101381] [2024-06-28 02:38:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:20,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:20,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105101381] [2024-06-28 02:38:20,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105101381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:20,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:20,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:20,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924687523] [2024-06-28 02:38:20,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:20,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:20,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:20,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:20,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:20,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 334 transitions, 4913 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:20,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:20,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:23,644 INFO L124 PetriNetUnfolderBase]: 10662/16052 cut-off events. [2024-06-28 02:38:23,644 INFO L125 PetriNetUnfolderBase]: For 493486/493489 co-relation queries the response was YES. [2024-06-28 02:38:23,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111408 conditions, 16052 events. 10662/16052 cut-off events. For 493486/493489 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 108529 event pairs, 3656 based on Foata normal form. 1/16046 useless extension candidates. Maximal degree in co-relation 111290. Up to 14965 conditions per place. [2024-06-28 02:38:23,839 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 273 selfloop transitions, 78 changer transitions 0/360 dead transitions. [2024-06-28 02:38:23,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 360 transitions, 5853 flow [2024-06-28 02:38:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:38:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:38:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-28 02:38:23,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637755102040817 [2024-06-28 02:38:23,842 INFO L175 Difference]: Start difference. First operand has 237 places, 334 transitions, 4913 flow. Second operand 8 states and 221 transitions. [2024-06-28 02:38:23,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 360 transitions, 5853 flow [2024-06-28 02:38:26,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 360 transitions, 5617 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-28 02:38:26,463 INFO L231 Difference]: Finished difference. Result has 241 places, 338 transitions, 4931 flow [2024-06-28 02:38:26,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4931, PETRI_PLACES=241, PETRI_TRANSITIONS=338} [2024-06-28 02:38:26,464 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 189 predicate places. [2024-06-28 02:38:26,464 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 338 transitions, 4931 flow [2024-06-28 02:38:26,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:26,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:26,464 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] [2024-06-28 02:38:26,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:38:26,464 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:26,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash -387973391, now seen corresponding path program 1 times [2024-06-28 02:38:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359153382] [2024-06-28 02:38:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:26,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:26,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359153382] [2024-06-28 02:38:26,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359153382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:26,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:26,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:38:26,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735034138] [2024-06-28 02:38:26,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:26,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:38:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:38:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:38:26,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:26,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 338 transitions, 4931 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:26,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:26,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:26,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:29,661 INFO L124 PetriNetUnfolderBase]: 10845/16377 cut-off events. [2024-06-28 02:38:29,661 INFO L125 PetriNetUnfolderBase]: For 530165/530172 co-relation queries the response was YES. [2024-06-28 02:38:29,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113118 conditions, 16377 events. 10845/16377 cut-off events. For 530165/530172 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 110415 event pairs, 2018 based on Foata normal form. 37/16406 useless extension candidates. Maximal degree in co-relation 112999. Up to 10890 conditions per place. [2024-06-28 02:38:29,844 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 297 selfloop transitions, 90 changer transitions 0/396 dead transitions. [2024-06-28 02:38:29,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 396 transitions, 6222 flow [2024-06-28 02:38:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:38:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:38:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-06-28 02:38:29,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618075801749271 [2024-06-28 02:38:29,848 INFO L175 Difference]: Start difference. First operand has 241 places, 338 transitions, 4931 flow. Second operand 7 states and 227 transitions. [2024-06-28 02:38:29,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 396 transitions, 6222 flow [2024-06-28 02:38:33,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 396 transitions, 6079 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:38:33,079 INFO L231 Difference]: Finished difference. Result has 244 places, 339 transitions, 5004 flow [2024-06-28 02:38:33,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5004, PETRI_PLACES=244, PETRI_TRANSITIONS=339} [2024-06-28 02:38:33,080 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 192 predicate places. [2024-06-28 02:38:33,080 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 339 transitions, 5004 flow [2024-06-28 02:38:33,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:33,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:33,081 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] [2024-06-28 02:38:33,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:38:33,081 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:33,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1429937359, now seen corresponding path program 2 times [2024-06-28 02:38:33,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:33,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610961554] [2024-06-28 02:38:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:33,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610961554] [2024-06-28 02:38:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610961554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:33,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:33,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:38:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111881370] [2024-06-28 02:38:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:33,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:38:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:38:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:38:33,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:33,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 339 transitions, 5004 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:33,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:33,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:33,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:36,132 INFO L124 PetriNetUnfolderBase]: 10761/16257 cut-off events. [2024-06-28 02:38:36,132 INFO L125 PetriNetUnfolderBase]: For 524380/524387 co-relation queries the response was YES. [2024-06-28 02:38:36,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112352 conditions, 16257 events. 10761/16257 cut-off events. For 524380/524387 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 109926 event pairs, 2996 based on Foata normal form. 37/16286 useless extension candidates. Maximal degree in co-relation 112232. Up to 14364 conditions per place. [2024-06-28 02:38:36,330 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 327 selfloop transitions, 39 changer transitions 0/375 dead transitions. [2024-06-28 02:38:36,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 375 transitions, 5858 flow [2024-06-28 02:38:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:38:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:38:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 02:38:36,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-28 02:38:36,331 INFO L175 Difference]: Start difference. First operand has 244 places, 339 transitions, 5004 flow. Second operand 6 states and 185 transitions. [2024-06-28 02:38:36,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 375 transitions, 5858 flow [2024-06-28 02:38:39,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 375 transitions, 5609 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 02:38:39,285 INFO L231 Difference]: Finished difference. Result has 244 places, 338 transitions, 4782 flow [2024-06-28 02:38:39,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4782, PETRI_PLACES=244, PETRI_TRANSITIONS=338} [2024-06-28 02:38:39,285 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 192 predicate places. [2024-06-28 02:38:39,286 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 338 transitions, 4782 flow [2024-06-28 02:38:39,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:39,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:39,286 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] [2024-06-28 02:38:39,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:38:39,286 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:39,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1170102687, now seen corresponding path program 5 times [2024-06-28 02:38:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:39,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440519969] [2024-06-28 02:38:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:39,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:39,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:39,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440519969] [2024-06-28 02:38:39,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440519969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:39,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:39,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117576447] [2024-06-28 02:38:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:39,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:39,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:39,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:39,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 338 transitions, 4782 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:39,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:39,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:39,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:42,169 INFO L124 PetriNetUnfolderBase]: 10757/16216 cut-off events. [2024-06-28 02:38:42,169 INFO L125 PetriNetUnfolderBase]: For 506549/506552 co-relation queries the response was YES. [2024-06-28 02:38:42,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110506 conditions, 16216 events. 10757/16216 cut-off events. For 506549/506552 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 110005 event pairs, 3730 based on Foata normal form. 1/16206 useless extension candidates. Maximal degree in co-relation 110386. Up to 15114 conditions per place. [2024-06-28 02:38:42,355 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 268 selfloop transitions, 74 changer transitions 0/351 dead transitions. [2024-06-28 02:38:42,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 351 transitions, 5498 flow [2024-06-28 02:38:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:38:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:38:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-28 02:38:42,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-28 02:38:42,356 INFO L175 Difference]: Start difference. First operand has 244 places, 338 transitions, 4782 flow. Second operand 6 states and 167 transitions. [2024-06-28 02:38:42,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 351 transitions, 5498 flow [2024-06-28 02:38:44,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 351 transitions, 5280 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 02:38:44,697 INFO L231 Difference]: Finished difference. Result has 245 places, 338 transitions, 4719 flow [2024-06-28 02:38:44,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4719, PETRI_PLACES=245, PETRI_TRANSITIONS=338} [2024-06-28 02:38:44,698 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 193 predicate places. [2024-06-28 02:38:44,698 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 338 transitions, 4719 flow [2024-06-28 02:38:44,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:44,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:44,699 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, 1] [2024-06-28 02:38:44,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:38:44,699 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:44,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:44,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2094959120, now seen corresponding path program 1 times [2024-06-28 02:38:44,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:44,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004442546] [2024-06-28 02:38:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:44,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:44,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:44,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004442546] [2024-06-28 02:38:44,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004442546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:44,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:44,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952380009] [2024-06-28 02:38:44,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:44,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:44,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:44,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:44,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:38:44,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 338 transitions, 4719 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:44,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:44,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:38:44,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:47,588 INFO L124 PetriNetUnfolderBase]: 10358/15689 cut-off events. [2024-06-28 02:38:47,588 INFO L125 PetriNetUnfolderBase]: For 517234/517370 co-relation queries the response was YES. [2024-06-28 02:38:47,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105967 conditions, 15689 events. 10358/15689 cut-off events. For 517234/517370 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 107205 event pairs, 3540 based on Foata normal form. 18/15487 useless extension candidates. Maximal degree in co-relation 105848. Up to 14363 conditions per place. [2024-06-28 02:38:47,784 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 264 selfloop transitions, 57 changer transitions 0/354 dead transitions. [2024-06-28 02:38:47,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 354 transitions, 5467 flow [2024-06-28 02:38:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:38:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:38:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-28 02:38:47,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-28 02:38:47,785 INFO L175 Difference]: Start difference. First operand has 245 places, 338 transitions, 4719 flow. Second operand 5 states and 148 transitions. [2024-06-28 02:38:47,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 354 transitions, 5467 flow [2024-06-28 02:38:50,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 354 transitions, 5310 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 02:38:50,337 INFO L231 Difference]: Finished difference. Result has 245 places, 342 transitions, 4772 flow [2024-06-28 02:38:50,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4772, PETRI_PLACES=245, PETRI_TRANSITIONS=342} [2024-06-28 02:38:50,352 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 193 predicate places. [2024-06-28 02:38:50,353 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 342 transitions, 4772 flow [2024-06-28 02:38:50,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:50,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:50,353 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] [2024-06-28 02:38:50,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:38:50,353 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:50,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1221449691, now seen corresponding path program 6 times [2024-06-28 02:38:50,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:50,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934583669] [2024-06-28 02:38:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:50,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:50,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934583669] [2024-06-28 02:38:50,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934583669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:50,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23857437] [2024-06-28 02:38:50,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:50,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:50,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:50,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 342 transitions, 4772 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:50,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:50,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:50,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:38:53,207 INFO L124 PetriNetUnfolderBase]: 10778/16264 cut-off events. [2024-06-28 02:38:53,207 INFO L125 PetriNetUnfolderBase]: For 539381/539384 co-relation queries the response was YES. [2024-06-28 02:38:53,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111218 conditions, 16264 events. 10778/16264 cut-off events. For 539381/539384 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 110522 event pairs, 3690 based on Foata normal form. 1/16255 useless extension candidates. Maximal degree in co-relation 111098. Up to 15115 conditions per place. [2024-06-28 02:38:53,412 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 270 selfloop transitions, 96 changer transitions 0/375 dead transitions. [2024-06-28 02:38:53,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 375 transitions, 5901 flow [2024-06-28 02:38:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:38:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:38:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-28 02:38:53,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 02:38:53,413 INFO L175 Difference]: Start difference. First operand has 245 places, 342 transitions, 4772 flow. Second operand 7 states and 196 transitions. [2024-06-28 02:38:53,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 375 transitions, 5901 flow [2024-06-28 02:38:55,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 375 transitions, 5741 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 02:38:55,990 INFO L231 Difference]: Finished difference. Result has 250 places, 354 transitions, 5091 flow [2024-06-28 02:38:55,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4612, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5091, PETRI_PLACES=250, PETRI_TRANSITIONS=354} [2024-06-28 02:38:55,991 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 198 predicate places. [2024-06-28 02:38:55,991 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 354 transitions, 5091 flow [2024-06-28 02:38:55,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:55,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:38:55,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:38:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:38:55,993 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:38:55,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:38:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2140582203, now seen corresponding path program 7 times [2024-06-28 02:38:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:38:55,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151876118] [2024-06-28 02:38:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:38:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:38:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:38:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:38:56,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:38:56,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151876118] [2024-06-28 02:38:56,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151876118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:38:56,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:38:56,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:38:56,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976957837] [2024-06-28 02:38:56,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:38:56,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:38:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:38:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:38:56,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:38:56,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:38:56,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 354 transitions, 5091 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:38:56,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:38:56,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:38:56,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand