./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/protection/safe016_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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:42:48,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:42:48,649 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:42:48,654 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:42:48,654 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:42:48,678 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:42:48,678 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:42:48,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:42:48,679 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:42:48,682 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:42:48,682 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:42:48,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:42:48,683 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:42:48,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:42:48,684 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:42:48,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:42:48,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:42:48,685 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:42:48,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:42:48,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:42:48,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:42:48,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:42:48,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:42:48,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:42:48,687 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:42:48,687 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:42:48,687 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:42:48,688 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:42:48,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:42:48,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:42:48,689 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:42:48,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:42:48,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:42:48,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:42:48,690 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:42:48,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:42:48,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:42:48,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:42:48,690 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:42:48,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:42:48,690 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:42:48,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:42:48,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:42:48,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:42:48,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:42:48,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:42:48,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:42:48,927 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:42:48,927 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:42:48,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 12:42:49,033 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:42:49,033 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:42:49,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:42:49,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:42:50,261 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:42:50,264 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:42:50,280 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1121b53b/2e188e5277014f15bc5fa927b20e560a/FLAG3e36a4995 [2024-05-12 12:42:50,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1121b53b/2e188e5277014f15bc5fa927b20e560a [2024-05-12 12:42:50,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:42:50,297 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:42:50,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:42:50,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:42:50,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:42:50,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:42:49" (1/2) ... [2024-05-12 12:42:50,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53465674 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:42:50, skipping insertion in model container [2024-05-12 12:42:50,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:42:49" (1/2) ... [2024-05-12 12:42:50,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3db61b14 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:42:50, skipping insertion in model container [2024-05-12 12:42:50,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:42:50" (2/2) ... [2024-05-12 12:42:50,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53465674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50, skipping insertion in model container [2024-05-12 12:42:50,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:42:50" (2/2) ... [2024-05-12 12:42:50,307 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:42:50,344 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:42:50,345 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-05-12 12:42:50,345 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-05-12 12:42:50,346 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-05-12 12:42:50,346 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-05-12 12:42:50,346 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:42:50,346 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-05-12 12:42:50,380 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:42:50,529 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-05-12 12:42:50,680 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:42:50,687 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:42:50,715 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:42:50,764 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:42:50,791 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:42:50,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50 WrapperNode [2024-05-12 12:42:50,791 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:42:50,792 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:42:50,792 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:42:50,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:42:50,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,810 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,839 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2024-05-12 12:42:50,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:42:50,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:42:50,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:42:50,840 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:42:50,848 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,850 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,862 INFO L175 MemorySlicer]: Split 6 memory accesses to 5 slices as follows [2, 1, 1, 1, 1]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-05-12 12:42:50,863 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,863 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,868 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,872 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,874 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:42:50,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:42:50,881 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:42:50,881 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:42:50,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (1/1) ... [2024-05-12 12:42:50,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:42:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:42:50,938 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) [2024-05-12 12:42:50,950 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 [2024-05-12 12:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:42:50,967 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:42:50,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:42:50,968 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 12:42:50,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 12:42:50,968 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-05-12 12:42:50,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-05-12 12:42:50,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:42:50,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:42:50,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:42:50,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:42:50,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 12:42:50,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:42:50,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:42:50,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:42:50,970 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:42:51,087 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:42:51,094 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:42:51,310 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:42:51,311 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:42:51,374 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:42:51,374 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:42:51,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:42:51 BoogieIcfgContainer [2024-05-12 12:42:51,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:42:51,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:42:51,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:42:51,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:42:51,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:42:49" (1/4) ... [2024-05-12 12:42:51,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f274988 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:42:51, skipping insertion in model container [2024-05-12 12:42:51,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:42:50" (2/4) ... [2024-05-12 12:42:51,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f274988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:42:51, skipping insertion in model container [2024-05-12 12:42:51,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:42:50" (3/4) ... [2024-05-12 12:42:51,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f274988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:42:51, skipping insertion in model container [2024-05-12 12:42:51,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:42:51" (4/4) ... [2024-05-12 12:42:51,382 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 12:42:51,396 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:42:51,396 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 12:42:51,396 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:42:51,436 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:42:51,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 55 transitions, 126 flow [2024-05-12 12:42:51,494 INFO L124 PetriNetUnfolderBase]: 1/51 cut-off events. [2024-05-12 12:42:51,495 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:42:51,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 51 events. 1/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-05-12 12:42:51,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 55 transitions, 126 flow [2024-05-12 12:42:51,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 48 transitions, 108 flow [2024-05-12 12:42:51,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:42:51,519 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@603bde2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:42:51,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 12:42:51,523 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:42:51,523 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 12:42:51,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:42:51,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:51,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:42:51,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:51,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1623083077, now seen corresponding path program 1 times [2024-05-12 12:42:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:51,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145529313] [2024-05-12 12:42:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:51,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:51,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145529313] [2024-05-12 12:42:51,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145529313] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:51,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:51,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:42:51,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148600664] [2024-05-12 12:42:51,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:51,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:42:51,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:42:52,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:42:52,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 12:42:52,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:52,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:52,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 12:42:52,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:52,635 INFO L124 PetriNetUnfolderBase]: 4259/6242 cut-off events. [2024-05-12 12:42:52,635 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-05-12 12:42:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12292 conditions, 6242 events. 4259/6242 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 37047 event pairs, 2762 based on Foata normal form. 1/6078 useless extension candidates. Maximal degree in co-relation 12276. Up to 5859 conditions per place. [2024-05-12 12:42:52,675 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 43 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-05-12 12:42:52,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 245 flow [2024-05-12 12:42:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:42:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:42:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-05-12 12:42:52,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696969696969697 [2024-05-12 12:42:52,686 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 108 flow. Second operand 3 states and 115 transitions. [2024-05-12 12:42:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 245 flow [2024-05-12 12:42:52,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:42:52,694 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 143 flow [2024-05-12 12:42:52,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-05-12 12:42:52,698 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-05-12 12:42:52,698 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 143 flow [2024-05-12 12:42:52,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:52,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:52,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:42:52,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:42:52,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:52,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -524999468, now seen corresponding path program 1 times [2024-05-12 12:42:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297926069] [2024-05-12 12:42:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:52,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297926069] [2024-05-12 12:42:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297926069] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:52,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:52,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:42:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209246217] [2024-05-12 12:42:52,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:52,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:42:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:42:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:42:52,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:42:52,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:52,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:52,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:42:52,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:53,685 INFO L124 PetriNetUnfolderBase]: 6873/10554 cut-off events. [2024-05-12 12:42:53,686 INFO L125 PetriNetUnfolderBase]: For 1719/1725 co-relation queries the response was YES. [2024-05-12 12:42:53,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22858 conditions, 10554 events. 6873/10554 cut-off events. For 1719/1725 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 66920 event pairs, 3630 based on Foata normal form. 11/10485 useless extension candidates. Maximal degree in co-relation 22843. Up to 9207 conditions per place. [2024-05-12 12:42:53,759 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 66 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-05-12 12:42:53,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 93 transitions, 418 flow [2024-05-12 12:42:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:42:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:42:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-05-12 12:42:53,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954545454545454 [2024-05-12 12:42:53,771 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 143 flow. Second operand 4 states and 153 transitions. [2024-05-12 12:42:53,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 93 transitions, 418 flow [2024-05-12 12:42:53,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:42:53,779 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 240 flow [2024-05-12 12:42:53,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-05-12 12:42:53,779 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2024-05-12 12:42:53,780 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 240 flow [2024-05-12 12:42:53,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:53,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:53,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:42:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:42:53,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:53,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1571769615, now seen corresponding path program 1 times [2024-05-12 12:42:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:53,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51295938] [2024-05-12 12:42:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:53,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:53,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:53,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51295938] [2024-05-12 12:42:53,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51295938] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:53,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:53,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:42:53,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761227694] [2024-05-12 12:42:53,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:53,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:42:53,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:42:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:42:54,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:42:54,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:54,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:54,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:42:54,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:54,767 INFO L124 PetriNetUnfolderBase]: 7067/10342 cut-off events. [2024-05-12 12:42:54,767 INFO L125 PetriNetUnfolderBase]: For 6068/6086 co-relation queries the response was YES. [2024-05-12 12:42:54,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26972 conditions, 10342 events. 7067/10342 cut-off events. For 6068/6086 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 62406 event pairs, 2139 based on Foata normal form. 46/10369 useless extension candidates. Maximal degree in co-relation 26954. Up to 9219 conditions per place. [2024-05-12 12:42:54,820 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 78 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-05-12 12:42:54,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 108 transitions, 556 flow [2024-05-12 12:42:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:42:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:42:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-05-12 12:42:54,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-05-12 12:42:54,822 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 240 flow. Second operand 5 states and 187 transitions. [2024-05-12 12:42:54,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 108 transitions, 556 flow [2024-05-12 12:42:54,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 552 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 12:42:54,826 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 295 flow [2024-05-12 12:42:54,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-05-12 12:42:54,827 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2024-05-12 12:42:54,827 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 295 flow [2024-05-12 12:42:54,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:54,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:54,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:42:54,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:42:54,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:54,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1475579201, now seen corresponding path program 1 times [2024-05-12 12:42:54,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:54,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190466328] [2024-05-12 12:42:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:54,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:55,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190466328] [2024-05-12 12:42:55,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190466328] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:55,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:55,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:42:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466272740] [2024-05-12 12:42:55,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:42:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:42:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:42:55,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:42:55,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 295 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) [2024-05-12 12:42:55,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:55,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:42:55,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:55,877 INFO L124 PetriNetUnfolderBase]: 5554/8109 cut-off events. [2024-05-12 12:42:55,877 INFO L125 PetriNetUnfolderBase]: For 8331/8331 co-relation queries the response was YES. [2024-05-12 12:42:55,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23490 conditions, 8109 events. 5554/8109 cut-off events. For 8331/8331 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 48406 event pairs, 2400 based on Foata normal form. 6/8105 useless extension candidates. Maximal degree in co-relation 23469. Up to 7526 conditions per place. [2024-05-12 12:42:55,925 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 60 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-05-12 12:42:55,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 506 flow [2024-05-12 12:42:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:42:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:42:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-05-12 12:42:55,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6681818181818182 [2024-05-12 12:42:55,927 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 295 flow. Second operand 4 states and 147 transitions. [2024-05-12 12:42:55,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 506 flow [2024-05-12 12:42:55,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 471 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:42:55,932 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 324 flow [2024-05-12 12:42:55,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=324, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-05-12 12:42:55,933 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2024-05-12 12:42:55,933 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 324 flow [2024-05-12 12:42:55,934 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) [2024-05-12 12:42:55,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:55,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:42:55,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:42:55,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:55,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash 645969080, now seen corresponding path program 1 times [2024-05-12 12:42:55,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:55,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724542656] [2024-05-12 12:42:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:55,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:56,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:56,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724542656] [2024-05-12 12:42:56,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724542656] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:56,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:56,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:42:56,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15008000] [2024-05-12 12:42:56,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:56,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:42:56,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:42:56,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:42:56,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:42:56,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:56,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:56,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:42:56,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:56,720 INFO L124 PetriNetUnfolderBase]: 5719/8390 cut-off events. [2024-05-12 12:42:56,721 INFO L125 PetriNetUnfolderBase]: For 9932/9932 co-relation queries the response was YES. [2024-05-12 12:42:56,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24613 conditions, 8390 events. 5719/8390 cut-off events. For 9932/9932 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 50054 event pairs, 2130 based on Foata normal form. 30/8410 useless extension candidates. Maximal degree in co-relation 24590. Up to 7535 conditions per place. [2024-05-12 12:42:56,765 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 73 selfloop transitions, 17 changer transitions 0/105 dead transitions. [2024-05-12 12:42:56,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 610 flow [2024-05-12 12:42:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:42:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:42:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-05-12 12:42:56,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6654545454545454 [2024-05-12 12:42:56,766 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 324 flow. Second operand 5 states and 183 transitions. [2024-05-12 12:42:56,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 610 flow [2024-05-12 12:42:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 595 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 12:42:56,772 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 380 flow [2024-05-12 12:42:56,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-05-12 12:42:56,774 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 13 predicate places. [2024-05-12 12:42:56,774 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 380 flow [2024-05-12 12:42:56,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:56,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:56,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:42:56,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:42:56,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:56,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2116182503, now seen corresponding path program 1 times [2024-05-12 12:42:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:56,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080097787] [2024-05-12 12:42:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:56,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:56,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080097787] [2024-05-12 12:42:56,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080097787] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:56,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:56,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:42:56,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121816530] [2024-05-12 12:42:56,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:56,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:42:56,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:56,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:42:56,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:42:56,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:42:56,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:56,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:56,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:42:56,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:57,826 INFO L124 PetriNetUnfolderBase]: 7165/10446 cut-off events. [2024-05-12 12:42:57,827 INFO L125 PetriNetUnfolderBase]: For 16611/16613 co-relation queries the response was YES. [2024-05-12 12:42:57,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32145 conditions, 10446 events. 7165/10446 cut-off events. For 16611/16613 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 62556 event pairs, 2665 based on Foata normal form. 5/10443 useless extension candidates. Maximal degree in co-relation 32120. Up to 9718 conditions per place. [2024-05-12 12:42:57,877 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 79 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2024-05-12 12:42:57,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 718 flow [2024-05-12 12:42:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:42:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:42:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-05-12 12:42:57,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-05-12 12:42:57,878 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 380 flow. Second operand 4 states and 142 transitions. [2024-05-12 12:42:57,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 718 flow [2024-05-12 12:42:57,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 107 transitions, 673 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 12:42:57,894 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 468 flow [2024-05-12 12:42:57,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=468, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-05-12 12:42:57,895 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2024-05-12 12:42:57,895 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 468 flow [2024-05-12 12:42:57,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:42:57,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:57,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:42:57,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:42:57,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:57,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1523145595, now seen corresponding path program 1 times [2024-05-12 12:42:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:57,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097803845] [2024-05-12 12:42:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:58,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:58,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097803845] [2024-05-12 12:42:58,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097803845] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:58,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:58,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:42:58,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685461203] [2024-05-12 12:42:58,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:58,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:42:58,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:58,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:42:58,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:42:58,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:42:58,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 468 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) [2024-05-12 12:42:58,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:58,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:42:58,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:42:58,945 INFO L124 PetriNetUnfolderBase]: 7230/10509 cut-off events. [2024-05-12 12:42:58,946 INFO L125 PetriNetUnfolderBase]: For 24345/24345 co-relation queries the response was YES. [2024-05-12 12:42:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35474 conditions, 10509 events. 7230/10509 cut-off events. For 24345/24345 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63116 event pairs, 1767 based on Foata normal form. 18/10507 useless extension candidates. Maximal degree in co-relation 35447. Up to 8887 conditions per place. [2024-05-12 12:42:59,007 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 93 selfloop transitions, 20 changer transitions 0/127 dead transitions. [2024-05-12 12:42:59,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 127 transitions, 861 flow [2024-05-12 12:42:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:42:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:42:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-05-12 12:42:59,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581818181818182 [2024-05-12 12:42:59,009 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 468 flow. Second operand 5 states and 181 transitions. [2024-05-12 12:42:59,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 127 transitions, 861 flow [2024-05-12 12:42:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 847 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-05-12 12:42:59,025 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 547 flow [2024-05-12 12:42:59,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=547, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2024-05-12 12:42:59,026 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 20 predicate places. [2024-05-12 12:42:59,026 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 547 flow [2024-05-12 12:42:59,026 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) [2024-05-12 12:42:59,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:42:59,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:42:59,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:42:59,026 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:42:59,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:42:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 642199067, now seen corresponding path program 1 times [2024-05-12 12:42:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:42:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028810055] [2024-05-12 12:42:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:42:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:42:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:42:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:42:59,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:42:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028810055] [2024-05-12 12:42:59,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028810055] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:42:59,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:42:59,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:42:59,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601266388] [2024-05-12 12:42:59,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:42:59,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:42:59,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:42:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:42:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:42:59,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:42:59,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 547 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) [2024-05-12 12:42:59,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:42:59,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:42:59,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:00,011 INFO L124 PetriNetUnfolderBase]: 7191/10986 cut-off events. [2024-05-12 12:43:00,012 INFO L125 PetriNetUnfolderBase]: For 31458/31458 co-relation queries the response was YES. [2024-05-12 12:43:00,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37420 conditions, 10986 events. 7191/10986 cut-off events. For 31458/31458 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 69432 event pairs, 2028 based on Foata normal form. 18/10902 useless extension candidates. Maximal degree in co-relation 37390. Up to 8869 conditions per place. [2024-05-12 12:43:00,078 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 90 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2024-05-12 12:43:00,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 852 flow [2024-05-12 12:43:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:00,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-05-12 12:43:00,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472727272727272 [2024-05-12 12:43:00,080 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 547 flow. Second operand 5 states and 178 transitions. [2024-05-12 12:43:00,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 852 flow [2024-05-12 12:43:00,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 124 transitions, 825 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-05-12 12:43:00,112 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 553 flow [2024-05-12 12:43:00,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=553, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-05-12 12:43:00,114 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 23 predicate places. [2024-05-12 12:43:00,114 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 553 flow [2024-05-12 12:43:00,114 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) [2024-05-12 12:43:00,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:00,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:00,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:43:00,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:00,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1030395927, now seen corresponding path program 1 times [2024-05-12 12:43:00,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:00,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795590864] [2024-05-12 12:43:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795590864] [2024-05-12 12:43:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795590864] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:00,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:00,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:43:00,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373430299] [2024-05-12 12:43:00,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:00,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:43:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:43:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:43:00,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:43:00,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 553 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:00,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:00,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:43:00,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:01,075 INFO L124 PetriNetUnfolderBase]: 6929/10362 cut-off events. [2024-05-12 12:43:01,075 INFO L125 PetriNetUnfolderBase]: For 34065/34081 co-relation queries the response was YES. [2024-05-12 12:43:01,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36998 conditions, 10362 events. 6929/10362 cut-off events. For 34065/34081 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 65032 event pairs, 2661 based on Foata normal form. 10/10355 useless extension candidates. Maximal degree in co-relation 36966. Up to 9162 conditions per place. [2024-05-12 12:43:01,159 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 83 selfloop transitions, 33 changer transitions 0/133 dead transitions. [2024-05-12 12:43:01,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 133 transitions, 1033 flow [2024-05-12 12:43:01,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-05-12 12:43:01,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618181818181819 [2024-05-12 12:43:01,161 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 553 flow. Second operand 5 states and 182 transitions. [2024-05-12 12:43:01,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 133 transitions, 1033 flow [2024-05-12 12:43:01,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 133 transitions, 977 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:43:01,338 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 716 flow [2024-05-12 12:43:01,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=716, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-05-12 12:43:01,348 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 25 predicate places. [2024-05-12 12:43:01,349 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 716 flow [2024-05-12 12:43:01,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:01,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:01,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:01,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:43:01,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:01,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1127105397, now seen corresponding path program 2 times [2024-05-12 12:43:01,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:01,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271999937] [2024-05-12 12:43:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:01,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271999937] [2024-05-12 12:43:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271999937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:01,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:01,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:43:01,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597082113] [2024-05-12 12:43:01,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:43:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:43:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:43:01,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:43:01,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 716 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:01,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:01,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:43:01,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:02,267 INFO L124 PetriNetUnfolderBase]: 7006/10502 cut-off events. [2024-05-12 12:43:02,267 INFO L125 PetriNetUnfolderBase]: For 44140/44158 co-relation queries the response was YES. [2024-05-12 12:43:02,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40762 conditions, 10502 events. 7006/10502 cut-off events. For 44140/44158 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 66002 event pairs, 2879 based on Foata normal form. 12/10466 useless extension candidates. Maximal degree in co-relation 40728. Up to 9332 conditions per place. [2024-05-12 12:43:02,341 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 98 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-05-12 12:43:02,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 146 transitions, 1185 flow [2024-05-12 12:43:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-05-12 12:43:02,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-05-12 12:43:02,343 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 716 flow. Second operand 5 states and 185 transitions. [2024-05-12 12:43:02,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 146 transitions, 1185 flow [2024-05-12 12:43:02,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 146 transitions, 1153 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-05-12 12:43:02,408 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 887 flow [2024-05-12 12:43:02,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=887, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-05-12 12:43:02,409 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 31 predicate places. [2024-05-12 12:43:02,409 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 887 flow [2024-05-12 12:43:02,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:02,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:02,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:02,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:43:02,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:02,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:02,410 INFO L85 PathProgramCache]: Analyzing trace with hash -884013903, now seen corresponding path program 1 times [2024-05-12 12:43:02,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:02,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750051426] [2024-05-12 12:43:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750051426] [2024-05-12 12:43:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750051426] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:02,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167320755] [2024-05-12 12:43:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:02,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:02,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 887 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:02,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:02,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:02,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:03,283 INFO L124 PetriNetUnfolderBase]: 7388/10852 cut-off events. [2024-05-12 12:43:03,283 INFO L125 PetriNetUnfolderBase]: For 48944/48964 co-relation queries the response was YES. [2024-05-12 12:43:03,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42830 conditions, 10852 events. 7388/10852 cut-off events. For 48944/48964 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 66259 event pairs, 2565 based on Foata normal form. 24/10853 useless extension candidates. Maximal degree in co-relation 42792. Up to 9729 conditions per place. [2024-05-12 12:43:03,367 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 93 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-05-12 12:43:03,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1380 flow [2024-05-12 12:43:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-05-12 12:43:03,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6618181818181819 [2024-05-12 12:43:03,369 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 887 flow. Second operand 5 states and 182 transitions. [2024-05-12 12:43:03,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1380 flow [2024-05-12 12:43:03,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 151 transitions, 1310 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:03,455 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 971 flow [2024-05-12 12:43:03,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=971, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-05-12 12:43:03,456 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 33 predicate places. [2024-05-12 12:43:03,456 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 971 flow [2024-05-12 12:43:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:03,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:03,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:03,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:43:03,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:03,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:03,457 INFO L85 PathProgramCache]: Analyzing trace with hash 895871752, now seen corresponding path program 1 times [2024-05-12 12:43:03,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:03,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63623352] [2024-05-12 12:43:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:03,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:03,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:03,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63623352] [2024-05-12 12:43:03,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63623352] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:03,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:03,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:03,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048567241] [2024-05-12 12:43:03,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:03,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:03,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:03,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:03,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 971 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:03,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:03,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:03,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:04,465 INFO L124 PetriNetUnfolderBase]: 7487/10994 cut-off events. [2024-05-12 12:43:04,466 INFO L125 PetriNetUnfolderBase]: For 47935/47949 co-relation queries the response was YES. [2024-05-12 12:43:04,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43514 conditions, 10994 events. 7487/10994 cut-off events. For 47935/47949 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 66852 event pairs, 2503 based on Foata normal form. 17/11005 useless extension candidates. Maximal degree in co-relation 43476. Up to 10046 conditions per place. [2024-05-12 12:43:04,551 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 104 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-05-12 12:43:04,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 149 transitions, 1408 flow [2024-05-12 12:43:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-05-12 12:43:04,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2024-05-12 12:43:04,553 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 971 flow. Second operand 5 states and 170 transitions. [2024-05-12 12:43:04,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 149 transitions, 1408 flow [2024-05-12 12:43:04,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 1275 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:04,652 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1031 flow [2024-05-12 12:43:04,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1031, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2024-05-12 12:43:04,652 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 36 predicate places. [2024-05-12 12:43:04,652 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1031 flow [2024-05-12 12:43:04,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:04,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:04,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:43:04,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:04,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash 895871411, now seen corresponding path program 2 times [2024-05-12 12:43:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:04,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205300911] [2024-05-12 12:43:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205300911] [2024-05-12 12:43:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205300911] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:04,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:04,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854028435] [2024-05-12 12:43:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:04,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:04,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1031 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:04,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:04,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:04,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:05,765 INFO L124 PetriNetUnfolderBase]: 7468/11302 cut-off events. [2024-05-12 12:43:05,765 INFO L125 PetriNetUnfolderBase]: For 61397/61413 co-relation queries the response was YES. [2024-05-12 12:43:05,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46642 conditions, 11302 events. 7468/11302 cut-off events. For 61397/61413 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 72082 event pairs, 3279 based on Foata normal form. 20/11233 useless extension candidates. Maximal degree in co-relation 46603. Up to 9938 conditions per place. [2024-05-12 12:43:05,863 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 115 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-05-12 12:43:05,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 160 transitions, 1409 flow [2024-05-12 12:43:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-05-12 12:43:05,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581818181818182 [2024-05-12 12:43:05,865 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1031 flow. Second operand 5 states and 181 transitions. [2024-05-12 12:43:05,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 160 transitions, 1409 flow [2024-05-12 12:43:05,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 160 transitions, 1352 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-05-12 12:43:05,990 INFO L231 Difference]: Finished difference. Result has 101 places, 126 transitions, 1054 flow [2024-05-12 12:43:05,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1054, PETRI_PLACES=101, PETRI_TRANSITIONS=126} [2024-05-12 12:43:05,991 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 40 predicate places. [2024-05-12 12:43:05,991 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 126 transitions, 1054 flow [2024-05-12 12:43:05,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:05,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:06,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:43:06,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:06,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -580326712, now seen corresponding path program 2 times [2024-05-12 12:43:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:06,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093000867] [2024-05-12 12:43:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:06,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093000867] [2024-05-12 12:43:06,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093000867] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:06,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:06,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:06,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869987798] [2024-05-12 12:43:06,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:06,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:06,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:06,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:06,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:06,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 126 transitions, 1054 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:06,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:06,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:06,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:07,109 INFO L124 PetriNetUnfolderBase]: 7498/10984 cut-off events. [2024-05-12 12:43:07,109 INFO L125 PetriNetUnfolderBase]: For 63852/63868 co-relation queries the response was YES. [2024-05-12 12:43:07,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47175 conditions, 10984 events. 7498/10984 cut-off events. For 63852/63868 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 66577 event pairs, 2525 based on Foata normal form. 19/10989 useless extension candidates. Maximal degree in co-relation 47134. Up to 9993 conditions per place. [2024-05-12 12:43:07,203 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 111 selfloop transitions, 42 changer transitions 0/167 dead transitions. [2024-05-12 12:43:07,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 167 transitions, 1616 flow [2024-05-12 12:43:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-05-12 12:43:07,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6327272727272727 [2024-05-12 12:43:07,205 INFO L175 Difference]: Start difference. First operand has 101 places, 126 transitions, 1054 flow. Second operand 5 states and 174 transitions. [2024-05-12 12:43:07,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 167 transitions, 1616 flow [2024-05-12 12:43:07,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 1554 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:43:07,330 INFO L231 Difference]: Finished difference. Result has 103 places, 140 transitions, 1260 flow [2024-05-12 12:43:07,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1260, PETRI_PLACES=103, PETRI_TRANSITIONS=140} [2024-05-12 12:43:07,330 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 42 predicate places. [2024-05-12 12:43:07,331 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 140 transitions, 1260 flow [2024-05-12 12:43:07,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:07,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:07,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:07,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:43:07,331 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:07,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:07,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2021855372, now seen corresponding path program 1 times [2024-05-12 12:43:07,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:07,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96733425] [2024-05-12 12:43:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:07,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:07,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:07,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96733425] [2024-05-12 12:43:07,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96733425] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:07,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:07,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:07,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487513801] [2024-05-12 12:43:07,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:07,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:07,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:07,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:07,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 140 transitions, 1260 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:07,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:07,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:07,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:08,390 INFO L124 PetriNetUnfolderBase]: 7578/11252 cut-off events. [2024-05-12 12:43:08,390 INFO L125 PetriNetUnfolderBase]: For 79507/79507 co-relation queries the response was YES. [2024-05-12 12:43:08,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51116 conditions, 11252 events. 7578/11252 cut-off events. For 79507/79507 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 69664 event pairs, 3291 based on Foata normal form. 3/11219 useless extension candidates. Maximal degree in co-relation 51073. Up to 10097 conditions per place. [2024-05-12 12:43:08,495 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 161 selfloop transitions, 32 changer transitions 0/207 dead transitions. [2024-05-12 12:43:08,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 207 transitions, 2106 flow [2024-05-12 12:43:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-05-12 12:43:08,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-05-12 12:43:08,497 INFO L175 Difference]: Start difference. First operand has 103 places, 140 transitions, 1260 flow. Second operand 6 states and 210 transitions. [2024-05-12 12:43:08,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 207 transitions, 2106 flow [2024-05-12 12:43:08,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 207 transitions, 2026 flow, removed 40 selfloop flow, removed 0 redundant places. [2024-05-12 12:43:08,616 INFO L231 Difference]: Finished difference. Result has 111 places, 160 transitions, 1467 flow [2024-05-12 12:43:08,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1467, PETRI_PLACES=111, PETRI_TRANSITIONS=160} [2024-05-12 12:43:08,617 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 50 predicate places. [2024-05-12 12:43:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 160 transitions, 1467 flow [2024-05-12 12:43:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:08,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:08,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:43:08,618 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:08,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -580528150, now seen corresponding path program 2 times [2024-05-12 12:43:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586622641] [2024-05-12 12:43:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:08,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:08,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:08,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586622641] [2024-05-12 12:43:08,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586622641] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:08,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:08,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335655447] [2024-05-12 12:43:08,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:08,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:08,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 160 transitions, 1467 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:08,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:08,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:08,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:09,886 INFO L124 PetriNetUnfolderBase]: 7620/11315 cut-off events. [2024-05-12 12:43:09,886 INFO L125 PetriNetUnfolderBase]: For 86453/86453 co-relation queries the response was YES. [2024-05-12 12:43:09,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52605 conditions, 11315 events. 7620/11315 cut-off events. For 86453/86453 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 70025 event pairs, 3306 based on Foata normal form. 3/11282 useless extension candidates. Maximal degree in co-relation 52557. Up to 10193 conditions per place. [2024-05-12 12:43:09,998 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 163 selfloop transitions, 27 changer transitions 0/204 dead transitions. [2024-05-12 12:43:09,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 204 transitions, 2162 flow [2024-05-12 12:43:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-05-12 12:43:10,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472727272727272 [2024-05-12 12:43:10,000 INFO L175 Difference]: Start difference. First operand has 111 places, 160 transitions, 1467 flow. Second operand 5 states and 178 transitions. [2024-05-12 12:43:10,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 204 transitions, 2162 flow [2024-05-12 12:43:10,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 204 transitions, 2084 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-05-12 12:43:10,140 INFO L231 Difference]: Finished difference. Result has 116 places, 167 transitions, 1547 flow [2024-05-12 12:43:10,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1547, PETRI_PLACES=116, PETRI_TRANSITIONS=167} [2024-05-12 12:43:10,141 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 55 predicate places. [2024-05-12 12:43:10,141 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 167 transitions, 1547 flow [2024-05-12 12:43:10,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:10,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:10,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:10,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:43:10,141 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:10,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash 902713750, now seen corresponding path program 3 times [2024-05-12 12:43:10,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:10,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434735662] [2024-05-12 12:43:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:10,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434735662] [2024-05-12 12:43:10,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434735662] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:10,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:10,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:10,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494931545] [2024-05-12 12:43:10,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:10,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:10,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:10,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:10,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:10,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 167 transitions, 1547 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:10,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:10,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:10,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:11,443 INFO L124 PetriNetUnfolderBase]: 7631/11295 cut-off events. [2024-05-12 12:43:11,443 INFO L125 PetriNetUnfolderBase]: For 96307/96313 co-relation queries the response was YES. [2024-05-12 12:43:11,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54037 conditions, 11295 events. 7631/11295 cut-off events. For 96307/96313 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 69500 event pairs, 3245 based on Foata normal form. 9/11284 useless extension candidates. Maximal degree in co-relation 53986. Up to 10207 conditions per place. [2024-05-12 12:43:11,559 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 170 selfloop transitions, 35 changer transitions 0/219 dead transitions. [2024-05-12 12:43:11,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 219 transitions, 2240 flow [2024-05-12 12:43:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:43:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:43:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-05-12 12:43:11,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6155844155844156 [2024-05-12 12:43:11,561 INFO L175 Difference]: Start difference. First operand has 116 places, 167 transitions, 1547 flow. Second operand 7 states and 237 transitions. [2024-05-12 12:43:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 219 transitions, 2240 flow [2024-05-12 12:43:11,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 2156 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:11,748 INFO L231 Difference]: Finished difference. Result has 120 places, 172 transitions, 1605 flow [2024-05-12 12:43:11,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1605, PETRI_PLACES=120, PETRI_TRANSITIONS=172} [2024-05-12 12:43:11,749 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 59 predicate places. [2024-05-12 12:43:11,749 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 172 transitions, 1605 flow [2024-05-12 12:43:11,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:11,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:11,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:11,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:43:11,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:11,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash -580312824, now seen corresponding path program 1 times [2024-05-12 12:43:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:11,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981890384] [2024-05-12 12:43:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:11,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:11,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981890384] [2024-05-12 12:43:11,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981890384] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:11,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:11,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876629405] [2024-05-12 12:43:11,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:11,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:11,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:11,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:11,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 172 transitions, 1605 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:11,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:11,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:11,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:12,968 INFO L124 PetriNetUnfolderBase]: 7733/11457 cut-off events. [2024-05-12 12:43:12,968 INFO L125 PetriNetUnfolderBase]: For 107018/107024 co-relation queries the response was YES. [2024-05-12 12:43:13,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55412 conditions, 11457 events. 7733/11457 cut-off events. For 107018/107024 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 70723 event pairs, 3299 based on Foata normal form. 18/11441 useless extension candidates. Maximal degree in co-relation 55360. Up to 10352 conditions per place. [2024-05-12 12:43:13,060 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 176 selfloop transitions, 18 changer transitions 0/208 dead transitions. [2024-05-12 12:43:13,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 208 transitions, 2195 flow [2024-05-12 12:43:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:43:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:43:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2024-05-12 12:43:13,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6290909090909091 [2024-05-12 12:43:13,061 INFO L175 Difference]: Start difference. First operand has 120 places, 172 transitions, 1605 flow. Second operand 5 states and 173 transitions. [2024-05-12 12:43:13,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 208 transitions, 2195 flow [2024-05-12 12:43:13,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 208 transitions, 2101 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 12:43:13,232 INFO L231 Difference]: Finished difference. Result has 120 places, 175 transitions, 1608 flow [2024-05-12 12:43:13,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1608, PETRI_PLACES=120, PETRI_TRANSITIONS=175} [2024-05-12 12:43:13,232 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 59 predicate places. [2024-05-12 12:43:13,232 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 175 transitions, 1608 flow [2024-05-12 12:43:13,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:13,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:13,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:43:13,233 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:13,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1756064171, now seen corresponding path program 1 times [2024-05-12 12:43:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:13,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692663161] [2024-05-12 12:43:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:13,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692663161] [2024-05-12 12:43:13,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692663161] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:13,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:43:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514309039] [2024-05-12 12:43:13,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:43:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:43:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:43:13,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:43:13,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 175 transitions, 1608 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:13,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:13,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:43:13,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:14,254 INFO L124 PetriNetUnfolderBase]: 7318/10851 cut-off events. [2024-05-12 12:43:14,254 INFO L125 PetriNetUnfolderBase]: For 127357/127419 co-relation queries the response was YES. [2024-05-12 12:43:14,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54948 conditions, 10851 events. 7318/10851 cut-off events. For 127357/127419 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 67758 event pairs, 3122 based on Foata normal form. 30/10672 useless extension candidates. Maximal degree in co-relation 54895. Up to 9716 conditions per place. [2024-05-12 12:43:14,358 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 152 selfloop transitions, 16 changer transitions 0/192 dead transitions. [2024-05-12 12:43:14,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 192 transitions, 2004 flow [2024-05-12 12:43:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:43:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:43:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-05-12 12:43:14,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-05-12 12:43:14,359 INFO L175 Difference]: Start difference. First operand has 120 places, 175 transitions, 1608 flow. Second operand 4 states and 138 transitions. [2024-05-12 12:43:14,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 192 transitions, 2004 flow [2024-05-12 12:43:14,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 192 transitions, 1939 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:14,543 INFO L231 Difference]: Finished difference. Result has 122 places, 177 transitions, 1625 flow [2024-05-12 12:43:14,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1625, PETRI_PLACES=122, PETRI_TRANSITIONS=177} [2024-05-12 12:43:14,543 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 61 predicate places. [2024-05-12 12:43:14,543 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 177 transitions, 1625 flow [2024-05-12 12:43:14,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:14,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:14,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:14,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:43:14,544 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:14,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -447289836, now seen corresponding path program 1 times [2024-05-12 12:43:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:14,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626419232] [2024-05-12 12:43:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:14,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:14,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626419232] [2024-05-12 12:43:14,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626419232] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:14,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:14,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:14,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125635704] [2024-05-12 12:43:14,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:14,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:14,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:14,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:14,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 177 transitions, 1625 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:14,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:14,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:14,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:15,837 INFO L124 PetriNetUnfolderBase]: 8206/12107 cut-off events. [2024-05-12 12:43:15,837 INFO L125 PetriNetUnfolderBase]: For 130516/130534 co-relation queries the response was YES. [2024-05-12 12:43:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60624 conditions, 12107 events. 8206/12107 cut-off events. For 130516/130534 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 74983 event pairs, 2477 based on Foata normal form. 24/12112 useless extension candidates. Maximal degree in co-relation 60569. Up to 10115 conditions per place. [2024-05-12 12:43:15,948 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 147 selfloop transitions, 106 changer transitions 0/267 dead transitions. [2024-05-12 12:43:15,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 267 transitions, 2920 flow [2024-05-12 12:43:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:43:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:43:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 314 transitions. [2024-05-12 12:43:15,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6343434343434343 [2024-05-12 12:43:15,950 INFO L175 Difference]: Start difference. First operand has 122 places, 177 transitions, 1625 flow. Second operand 9 states and 314 transitions. [2024-05-12 12:43:15,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 267 transitions, 2920 flow [2024-05-12 12:43:16,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 267 transitions, 2902 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-05-12 12:43:16,150 INFO L231 Difference]: Finished difference. Result has 133 places, 202 transitions, 2172 flow [2024-05-12 12:43:16,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2172, PETRI_PLACES=133, PETRI_TRANSITIONS=202} [2024-05-12 12:43:16,151 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 72 predicate places. [2024-05-12 12:43:16,151 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 202 transitions, 2172 flow [2024-05-12 12:43:16,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:16,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:16,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:16,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:43:16,152 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:16,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2002220984, now seen corresponding path program 2 times [2024-05-12 12:43:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389229309] [2024-05-12 12:43:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:16,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:16,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389229309] [2024-05-12 12:43:16,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389229309] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:16,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200886127] [2024-05-12 12:43:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:16,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:16,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 202 transitions, 2172 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:16,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:16,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:16,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:17,620 INFO L124 PetriNetUnfolderBase]: 8724/12930 cut-off events. [2024-05-12 12:43:17,621 INFO L125 PetriNetUnfolderBase]: For 166596/166612 co-relation queries the response was YES. [2024-05-12 12:43:17,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72013 conditions, 12930 events. 8724/12930 cut-off events. For 166596/166612 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 81093 event pairs, 2510 based on Foata normal form. 22/12933 useless extension candidates. Maximal degree in co-relation 71953. Up to 11042 conditions per place. [2024-05-12 12:43:17,751 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 190 selfloop transitions, 93 changer transitions 0/297 dead transitions. [2024-05-12 12:43:17,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 297 transitions, 3630 flow [2024-05-12 12:43:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:43:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:43:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 278 transitions. [2024-05-12 12:43:17,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-05-12 12:43:17,753 INFO L175 Difference]: Start difference. First operand has 133 places, 202 transitions, 2172 flow. Second operand 8 states and 278 transitions. [2024-05-12 12:43:17,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 297 transitions, 3630 flow [2024-05-12 12:43:18,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 297 transitions, 3376 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:18,213 INFO L231 Difference]: Finished difference. Result has 140 places, 239 transitions, 2739 flow [2024-05-12 12:43:18,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2739, PETRI_PLACES=140, PETRI_TRANSITIONS=239} [2024-05-12 12:43:18,214 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 79 predicate places. [2024-05-12 12:43:18,214 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 239 transitions, 2739 flow [2024-05-12 12:43:18,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:18,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:18,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:18,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:43:18,214 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:18,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:18,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2002210754, now seen corresponding path program 3 times [2024-05-12 12:43:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791180346] [2024-05-12 12:43:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:18,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:18,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:18,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791180346] [2024-05-12 12:43:18,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791180346] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:18,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:18,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:18,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383633100] [2024-05-12 12:43:18,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:18,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:18,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:18,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:18,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 239 transitions, 2739 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:18,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:18,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:18,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:19,731 INFO L124 PetriNetUnfolderBase]: 8708/12904 cut-off events. [2024-05-12 12:43:19,731 INFO L125 PetriNetUnfolderBase]: For 182566/182582 co-relation queries the response was YES. [2024-05-12 12:43:19,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74313 conditions, 12904 events. 8708/12904 cut-off events. For 182566/182582 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 80726 event pairs, 2693 based on Foata normal form. 22/12907 useless extension candidates. Maximal degree in co-relation 74249. Up to 11032 conditions per place. [2024-05-12 12:43:19,879 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 195 selfloop transitions, 90 changer transitions 0/299 dead transitions. [2024-05-12 12:43:19,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 299 transitions, 3769 flow [2024-05-12 12:43:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:43:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:43:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 253 transitions. [2024-05-12 12:43:19,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-05-12 12:43:19,881 INFO L175 Difference]: Start difference. First operand has 140 places, 239 transitions, 2739 flow. Second operand 7 states and 253 transitions. [2024-05-12 12:43:19,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 299 transitions, 3769 flow [2024-05-12 12:43:20,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 299 transitions, 3626 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:20,353 INFO L231 Difference]: Finished difference. Result has 146 places, 245 transitions, 2988 flow [2024-05-12 12:43:20,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2988, PETRI_PLACES=146, PETRI_TRANSITIONS=245} [2024-05-12 12:43:20,354 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 85 predicate places. [2024-05-12 12:43:20,354 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 245 transitions, 2988 flow [2024-05-12 12:43:20,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:20,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:20,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:20,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:43:20,355 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:20,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:20,355 INFO L85 PathProgramCache]: Analyzing trace with hash -821876930, now seen corresponding path program 4 times [2024-05-12 12:43:20,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:20,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846035033] [2024-05-12 12:43:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:20,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846035033] [2024-05-12 12:43:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846035033] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:20,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:20,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:20,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430374070] [2024-05-12 12:43:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:20,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:20,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:20,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:20,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 245 transitions, 2988 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:20,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:20,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:20,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:22,052 INFO L124 PetriNetUnfolderBase]: 9210/13605 cut-off events. [2024-05-12 12:43:22,052 INFO L125 PetriNetUnfolderBase]: For 203668/203684 co-relation queries the response was YES. [2024-05-12 12:43:22,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80658 conditions, 13605 events. 9210/13605 cut-off events. For 203668/203684 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 85537 event pairs, 2490 based on Foata normal form. 22/13611 useless extension candidates. Maximal degree in co-relation 80590. Up to 11129 conditions per place. [2024-05-12 12:43:22,172 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 188 selfloop transitions, 148 changer transitions 0/350 dead transitions. [2024-05-12 12:43:22,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 350 transitions, 4666 flow [2024-05-12 12:43:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:43:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:43:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 315 transitions. [2024-05-12 12:43:22,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-05-12 12:43:22,174 INFO L175 Difference]: Start difference. First operand has 146 places, 245 transitions, 2988 flow. Second operand 9 states and 315 transitions. [2024-05-12 12:43:22,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 350 transitions, 4666 flow [2024-05-12 12:43:22,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 350 transitions, 4529 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:22,666 INFO L231 Difference]: Finished difference. Result has 154 places, 282 transitions, 3737 flow [2024-05-12 12:43:22,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3737, PETRI_PLACES=154, PETRI_TRANSITIONS=282} [2024-05-12 12:43:22,666 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 93 predicate places. [2024-05-12 12:43:22,666 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 282 transitions, 3737 flow [2024-05-12 12:43:22,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:22,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:22,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:22,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:43:22,667 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:22,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1749854008, now seen corresponding path program 1 times [2024-05-12 12:43:22,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:22,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856516293] [2024-05-12 12:43:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:22,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:22,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856516293] [2024-05-12 12:43:22,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856516293] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:22,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:22,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:22,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96237286] [2024-05-12 12:43:22,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:22,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:22,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:22,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:43:22,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 282 transitions, 3737 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:22,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:22,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:43:22,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:24,391 INFO L124 PetriNetUnfolderBase]: 9369/14166 cut-off events. [2024-05-12 12:43:24,391 INFO L125 PetriNetUnfolderBase]: For 273510/273646 co-relation queries the response was YES. [2024-05-12 12:43:24,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90140 conditions, 14166 events. 9369/14166 cut-off events. For 273510/273646 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 93091 event pairs, 2921 based on Foata normal form. 133/14175 useless extension candidates. Maximal degree in co-relation 90069. Up to 11261 conditions per place. [2024-05-12 12:43:24,565 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 241 selfloop transitions, 71 changer transitions 0/338 dead transitions. [2024-05-12 12:43:24,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 338 transitions, 4903 flow [2024-05-12 12:43:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-05-12 12:43:24,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6757575757575758 [2024-05-12 12:43:24,569 INFO L175 Difference]: Start difference. First operand has 154 places, 282 transitions, 3737 flow. Second operand 6 states and 223 transitions. [2024-05-12 12:43:24,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 338 transitions, 4903 flow [2024-05-12 12:43:25,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 338 transitions, 4704 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-05-12 12:43:25,221 INFO L231 Difference]: Finished difference. Result has 157 places, 288 transitions, 3826 flow [2024-05-12 12:43:25,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3826, PETRI_PLACES=157, PETRI_TRANSITIONS=288} [2024-05-12 12:43:25,222 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 96 predicate places. [2024-05-12 12:43:25,222 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 288 transitions, 3826 flow [2024-05-12 12:43:25,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:25,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:25,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:25,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:43:25,223 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:25,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1746997048, now seen corresponding path program 2 times [2024-05-12 12:43:25,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:25,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398217379] [2024-05-12 12:43:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:25,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:25,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:25,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398217379] [2024-05-12 12:43:25,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398217379] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:25,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:25,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:25,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371412047] [2024-05-12 12:43:25,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:25,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:25,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:25,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:25,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:43:25,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 288 transitions, 3826 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:25,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:25,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:43:25,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:26,939 INFO L124 PetriNetUnfolderBase]: 9597/14121 cut-off events. [2024-05-12 12:43:26,940 INFO L125 PetriNetUnfolderBase]: For 287750/287776 co-relation queries the response was YES. [2024-05-12 12:43:27,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93033 conditions, 14121 events. 9597/14121 cut-off events. For 287750/287776 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 89568 event pairs, 2508 based on Foata normal form. 29/14120 useless extension candidates. Maximal degree in co-relation 92960. Up to 12147 conditions per place. [2024-05-12 12:43:27,106 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 238 selfloop transitions, 68 changer transitions 0/332 dead transitions. [2024-05-12 12:43:27,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 332 transitions, 4802 flow [2024-05-12 12:43:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 215 transitions. [2024-05-12 12:43:27,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-05-12 12:43:27,107 INFO L175 Difference]: Start difference. First operand has 157 places, 288 transitions, 3826 flow. Second operand 6 states and 215 transitions. [2024-05-12 12:43:27,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 332 transitions, 4802 flow [2024-05-12 12:43:28,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 332 transitions, 4646 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-05-12 12:43:28,041 INFO L231 Difference]: Finished difference. Result has 161 places, 291 transitions, 3892 flow [2024-05-12 12:43:28,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3892, PETRI_PLACES=161, PETRI_TRANSITIONS=291} [2024-05-12 12:43:28,041 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 100 predicate places. [2024-05-12 12:43:28,041 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 291 transitions, 3892 flow [2024-05-12 12:43:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:28,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:28,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:28,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:43:28,042 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:28,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:28,042 INFO L85 PathProgramCache]: Analyzing trace with hash -816507606, now seen corresponding path program 3 times [2024-05-12 12:43:28,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:28,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911351518] [2024-05-12 12:43:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:28,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:28,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911351518] [2024-05-12 12:43:28,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911351518] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:28,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:43:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627976840] [2024-05-12 12:43:28,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:28,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:43:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:28,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:43:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:43:28,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 12:43:28,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 291 transitions, 3892 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:28,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:28,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 12:43:28,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:29,836 INFO L124 PetriNetUnfolderBase]: 9723/14277 cut-off events. [2024-05-12 12:43:29,837 INFO L125 PetriNetUnfolderBase]: For 290587/290613 co-relation queries the response was YES. [2024-05-12 12:43:29,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93144 conditions, 14277 events. 9723/14277 cut-off events. For 290587/290613 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 90307 event pairs, 2051 based on Foata normal form. 29/14291 useless extension candidates. Maximal degree in co-relation 93069. Up to 12149 conditions per place. [2024-05-12 12:43:30,015 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 258 selfloop transitions, 55 changer transitions 0/339 dead transitions. [2024-05-12 12:43:30,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 339 transitions, 4694 flow [2024-05-12 12:43:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-05-12 12:43:30,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-05-12 12:43:30,016 INFO L175 Difference]: Start difference. First operand has 161 places, 291 transitions, 3892 flow. Second operand 6 states and 220 transitions. [2024-05-12 12:43:30,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 339 transitions, 4694 flow [2024-05-12 12:43:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 339 transitions, 4536 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 12:43:30,813 INFO L231 Difference]: Finished difference. Result has 163 places, 293 transitions, 3912 flow [2024-05-12 12:43:30,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3912, PETRI_PLACES=163, PETRI_TRANSITIONS=293} [2024-05-12 12:43:30,814 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 102 predicate places. [2024-05-12 12:43:30,814 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 293 transitions, 3912 flow [2024-05-12 12:43:30,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:30,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:30,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:43:30,814 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:30,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1485406380, now seen corresponding path program 1 times [2024-05-12 12:43:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:30,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252065907] [2024-05-12 12:43:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:30,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:30,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252065907] [2024-05-12 12:43:30,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252065907] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:30,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:30,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:30,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533460636] [2024-05-12 12:43:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:30,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:30,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:30,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 293 transitions, 3912 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:30,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:30,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:30,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:32,789 INFO L124 PetriNetUnfolderBase]: 10379/15198 cut-off events. [2024-05-12 12:43:32,789 INFO L125 PetriNetUnfolderBase]: For 323106/323126 co-relation queries the response was YES. [2024-05-12 12:43:32,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99657 conditions, 15198 events. 10379/15198 cut-off events. For 323106/323126 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 96617 event pairs, 2073 based on Foata normal form. 40/15193 useless extension candidates. Maximal degree in co-relation 99581. Up to 12881 conditions per place. [2024-05-12 12:43:32,964 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 269 selfloop transitions, 69 changer transitions 0/352 dead transitions. [2024-05-12 12:43:32,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 352 transitions, 5190 flow [2024-05-12 12:43:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:32,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-05-12 12:43:32,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-05-12 12:43:32,965 INFO L175 Difference]: Start difference. First operand has 163 places, 293 transitions, 3912 flow. Second operand 6 states and 222 transitions. [2024-05-12 12:43:32,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 352 transitions, 5190 flow [2024-05-12 12:43:33,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 352 transitions, 5066 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 12:43:33,743 INFO L231 Difference]: Finished difference. Result has 165 places, 299 transitions, 4088 flow [2024-05-12 12:43:33,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4088, PETRI_PLACES=165, PETRI_TRANSITIONS=299} [2024-05-12 12:43:33,743 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 104 predicate places. [2024-05-12 12:43:33,744 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 299 transitions, 4088 flow [2024-05-12 12:43:33,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:33,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:33,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:33,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:43:33,744 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:33,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash 135719986, now seen corresponding path program 2 times [2024-05-12 12:43:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:33,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430911939] [2024-05-12 12:43:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430911939] [2024-05-12 12:43:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430911939] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:33,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:33,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:33,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147083895] [2024-05-12 12:43:33,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:33,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:33,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:33,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 299 transitions, 4088 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:33,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:33,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:33,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:35,959 INFO L124 PetriNetUnfolderBase]: 10570/15807 cut-off events. [2024-05-12 12:43:35,959 INFO L125 PetriNetUnfolderBase]: For 358889/358909 co-relation queries the response was YES. [2024-05-12 12:43:36,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103585 conditions, 15807 events. 10570/15807 cut-off events. For 358889/358909 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 104023 event pairs, 3610 based on Foata normal form. 40/15720 useless extension candidates. Maximal degree in co-relation 103508. Up to 13706 conditions per place. [2024-05-12 12:43:36,204 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 267 selfloop transitions, 65 changer transitions 0/346 dead transitions. [2024-05-12 12:43:36,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 346 transitions, 5158 flow [2024-05-12 12:43:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-05-12 12:43:36,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6484848484848484 [2024-05-12 12:43:36,206 INFO L175 Difference]: Start difference. First operand has 165 places, 299 transitions, 4088 flow. Second operand 6 states and 214 transitions. [2024-05-12 12:43:36,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 346 transitions, 5158 flow [2024-05-12 12:43:37,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 346 transitions, 4986 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-05-12 12:43:37,320 INFO L231 Difference]: Finished difference. Result has 169 places, 302 transitions, 4141 flow [2024-05-12 12:43:37,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4141, PETRI_PLACES=169, PETRI_TRANSITIONS=302} [2024-05-12 12:43:37,321 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 108 predicate places. [2024-05-12 12:43:37,321 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 302 transitions, 4141 flow [2024-05-12 12:43:37,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:37,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:37,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:37,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:43:37,321 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:37,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1730374158, now seen corresponding path program 1 times [2024-05-12 12:43:37,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:37,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611128202] [2024-05-12 12:43:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:37,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611128202] [2024-05-12 12:43:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611128202] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:37,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:37,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149947798] [2024-05-12 12:43:37,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:37,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:37,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:37,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:37,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 302 transitions, 4141 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:37,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:37,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:37,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:39,193 INFO L124 PetriNetUnfolderBase]: 10563/15449 cut-off events. [2024-05-12 12:43:39,193 INFO L125 PetriNetUnfolderBase]: For 345879/345899 co-relation queries the response was YES. [2024-05-12 12:43:39,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102146 conditions, 15449 events. 10563/15449 cut-off events. For 345879/345899 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 98317 event pairs, 2607 based on Foata normal form. 22/15428 useless extension candidates. Maximal degree in co-relation 102067. Up to 13857 conditions per place. [2024-05-12 12:43:39,390 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 264 selfloop transitions, 62 changer transitions 0/340 dead transitions. [2024-05-12 12:43:39,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 340 transitions, 4991 flow [2024-05-12 12:43:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-05-12 12:43:39,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-05-12 12:43:39,391 INFO L175 Difference]: Start difference. First operand has 169 places, 302 transitions, 4141 flow. Second operand 6 states and 209 transitions. [2024-05-12 12:43:39,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 340 transitions, 4991 flow [2024-05-12 12:43:40,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 340 transitions, 4820 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 12:43:40,229 INFO L231 Difference]: Finished difference. Result has 171 places, 302 transitions, 4103 flow [2024-05-12 12:43:40,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4103, PETRI_PLACES=171, PETRI_TRANSITIONS=302} [2024-05-12 12:43:40,229 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 110 predicate places. [2024-05-12 12:43:40,230 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 302 transitions, 4103 flow [2024-05-12 12:43:40,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:40,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:40,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:40,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:43:40,230 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:40,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:40,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1938982130, now seen corresponding path program 3 times [2024-05-12 12:43:40,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:40,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281249243] [2024-05-12 12:43:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:40,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:40,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281249243] [2024-05-12 12:43:40,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281249243] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:40,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:40,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464630314] [2024-05-12 12:43:40,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:40,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:40,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:40,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:40,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 302 transitions, 4103 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:40,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:40,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:40,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:42,237 INFO L124 PetriNetUnfolderBase]: 10701/16154 cut-off events. [2024-05-12 12:43:42,237 INFO L125 PetriNetUnfolderBase]: For 368349/368365 co-relation queries the response was YES. [2024-05-12 12:43:42,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103565 conditions, 16154 events. 10701/16154 cut-off events. For 368349/368365 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 107744 event pairs, 3053 based on Foata normal form. 36/16068 useless extension candidates. Maximal degree in co-relation 103485. Up to 13727 conditions per place. [2024-05-12 12:43:42,439 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 281 selfloop transitions, 55 changer transitions 0/350 dead transitions. [2024-05-12 12:43:42,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 350 transitions, 4951 flow [2024-05-12 12:43:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:43:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:43:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-05-12 12:43:42,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6575757575757576 [2024-05-12 12:43:42,442 INFO L175 Difference]: Start difference. First operand has 171 places, 302 transitions, 4103 flow. Second operand 6 states and 217 transitions. [2024-05-12 12:43:42,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 350 transitions, 4951 flow [2024-05-12 12:43:43,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 350 transitions, 4785 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 12:43:43,358 INFO L231 Difference]: Finished difference. Result has 172 places, 304 transitions, 4115 flow [2024-05-12 12:43:43,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4115, PETRI_PLACES=172, PETRI_TRANSITIONS=304} [2024-05-12 12:43:43,358 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 111 predicate places. [2024-05-12 12:43:43,358 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 304 transitions, 4115 flow [2024-05-12 12:43:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:43,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:43:43,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:43:43,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:43:43,359 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 12:43:43,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:43:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1844763796, now seen corresponding path program 2 times [2024-05-12 12:43:43,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:43:43,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25682912] [2024-05-12 12:43:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:43:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:43:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:43:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:43:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:43:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25682912] [2024-05-12 12:43:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25682912] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:43:43,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:43:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:43:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70543051] [2024-05-12 12:43:43,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:43:43,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:43:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:43:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:43:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:43:43,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 12:43:43,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 304 transitions, 4115 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:43:43,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:43:43,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 12:43:43,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:43:46,071 INFO L124 PetriNetUnfolderBase]: 10694/16154 cut-off events. [2024-05-12 12:43:46,072 INFO L125 PetriNetUnfolderBase]: For 379960/379964 co-relation queries the response was YES. [2024-05-12 12:43:46,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104377 conditions, 16154 events. 10694/16154 cut-off events. For 379960/379964 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 107807 event pairs, 3644 based on Foata normal form. 6/16042 useless extension candidates. Maximal degree in co-relation 104296. Up to 14040 conditions per place.