./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/protection/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.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 12:49:14,493 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:49:14,543 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:49:14,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:49:14,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:49:14,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:49:14,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:49:14,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:49:14,564 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:49:14,564 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:49:14,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:49:14,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:49:14,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:49:14,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:49:14,565 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:49:14,565 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:49:14,566 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:49:14,566 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:49:14,566 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:49:14,566 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:49:14,567 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:49:14,569 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:49:14,569 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:49:14,569 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:49:14,569 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:49:14,570 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:49:14,570 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:49:14,570 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:49:14,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:49:14,571 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:49:14,571 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:49:14,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:49:14,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:49:14,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:49:14,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:49:14,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:49:14,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:49:14,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:49:14,577 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:49:14,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:49:14,577 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:49:14,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:49:14,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:49:14,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:49:14,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:49:14,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:49:14,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:49:14,837 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:49:14,837 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:49:14,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-05-12 12:49:15,865 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:49:16,057 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:49:16,058 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-05-12 12:49:16,077 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41897822a/94eadf02ee3a4fc5975ce8acc3a1a00a/FLAG2ffeb1c04 [2024-05-12 12:49:16,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41897822a/94eadf02ee3a4fc5975ce8acc3a1a00a [2024-05-12 12:49:16,091 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:49:16,091 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:49:16,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 12:49:16,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:49:16,198 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:49:16,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:49:16,200 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:49:16,204 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:49:16,205 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:49:16" (1/2) ... [2024-05-12 12:49:16,206 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4937735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:49:16, skipping insertion in model container [2024-05-12 12:49:16,206 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:49:16" (1/2) ... [2024-05-12 12:49:16,207 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@154fe855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:49:16, skipping insertion in model container [2024-05-12 12:49:16,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:49:16" (2/2) ... [2024-05-12 12:49:16,208 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4937735 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16, skipping insertion in model container [2024-05-12 12:49:16,208 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:49:16" (2/2) ... [2024-05-12 12:49:16,209 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:49:16,250 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:49:16,252 INFO L97 edCorrectnessWitness]: Location invariant before [L790-L790] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-05-12 12:49:16,252 INFO L97 edCorrectnessWitness]: Location invariant before [L787-L787] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-05-12 12:49:16,253 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) [2024-05-12 12:49:16,253 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:49:16,253 INFO L106 edCorrectnessWitness]: ghost_update [L785-L785] multithreaded = 1; [2024-05-12 12:49:16,293 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:49:16,417 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/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i[992,1005] [2024-05-12 12:49:16,528 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:49:16,534 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:49:16,580 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/safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i[992,1005] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:49:16,617 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:49:16,653 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:49:16,653 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16 WrapperNode [2024-05-12 12:49:16,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:49:16,654 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:49:16,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:49:16,654 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:49:16,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,715 INFO L138 Inliner]: procedures = 176, calls = 59, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 12:49:16,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:49:16,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:49:16,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:49:16,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:49:16,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,740 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,756 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 12:49:16,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,762 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,767 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:49:16,777 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:49:16,777 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:49:16,777 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:49:16,778 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (1/1) ... [2024-05-12 12:49:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:49:16,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:49:16,803 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 12:49:16,812 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 12:49:16,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:49:16,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:49:16,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:49:16,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:49:16,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:49:16,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:49:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:49:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:49:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:49:16,850 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:49:16,850 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:49:16,850 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:49:16,851 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 12:49:16,851 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 12:49:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:49:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:49:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:49:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:49:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:49:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:49:16,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:49:16,855 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 12:49:16,974 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:49:16,976 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:49:17,139 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:49:17,139 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:49:17,229 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:49:17,230 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:49:17,230 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:49:17 BoogieIcfgContainer [2024-05-12 12:49:17,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:49:17,232 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:49:17,232 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:49:17,234 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:49:17,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:49:16" (1/4) ... [2024-05-12 12:49:17,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194bd46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:49:17, skipping insertion in model container [2024-05-12 12:49:17,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:49:16" (2/4) ... [2024-05-12 12:49:17,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194bd46e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:49:17, skipping insertion in model container [2024-05-12 12:49:17,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:49:16" (3/4) ... [2024-05-12 12:49:17,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194bd46e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:49:17, skipping insertion in model container [2024-05-12 12:49:17,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:49:17" (4/4) ... [2024-05-12 12:49:17,242 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_pso.oepc_pso.opt_rmo.oepc_rmo.opt_tso.oepc_tso.opt.i [2024-05-12 12:49:17,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:49:17,256 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 12:49:17,256 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:49:17,304 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:49:17,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 12:49:17,360 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-05-12 12:49:17,360 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:49:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 75 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-05-12 12:49:17,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 12:49:17,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 43 transitions, 95 flow [2024-05-12 12:49:17,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:49:17,385 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;@155ef137, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:49:17,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 12:49:17,391 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:49:17,391 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:49:17,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:49:17,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:17,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:49:17,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:17,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2075242352, now seen corresponding path program 1 times [2024-05-12 12:49:17,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:17,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119023060] [2024-05-12 12:49:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:17,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:17,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119023060] [2024-05-12 12:49:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119023060] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:17,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:49:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704481083] [2024-05-12 12:49:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:17,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:49:17,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:17,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:49:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:49:17,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-05-12 12:49:17,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 12:49:17,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:17,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-05-12 12:49:17,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:18,203 INFO L124 PetriNetUnfolderBase]: 759/1475 cut-off events. [2024-05-12 12:49:18,204 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-05-12 12:49:18,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 1475 events. 759/1475 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9020 event pairs, 534 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 2666. Up to 1147 conditions per place. [2024-05-12 12:49:18,216 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 33 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-05-12 12:49:18,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 199 flow [2024-05-12 12:49:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:49:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:49:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-05-12 12:49:18,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7210884353741497 [2024-05-12 12:49:18,226 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 95 flow. Second operand 3 states and 106 transitions. [2024-05-12 12:49:18,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 199 flow [2024-05-12 12:49:18,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:18,254 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 122 flow [2024-05-12 12:49:18,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-05-12 12:49:18,258 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-05-12 12:49:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 122 flow [2024-05-12 12:49:18,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 12:49:18,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:18,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:49:18,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:18,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1443060433, now seen corresponding path program 1 times [2024-05-12 12:49:18,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:18,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894276329] [2024-05-12 12:49:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:18,459 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 12:49:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:18,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894276329] [2024-05-12 12:49:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894276329] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:18,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:18,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:49:18,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928935786] [2024-05-12 12:49:18,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:18,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:49:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:49:18,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:49:18,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:49:18,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:18,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:18,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:49:18,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:18,700 INFO L124 PetriNetUnfolderBase]: 1213/2259 cut-off events. [2024-05-12 12:49:18,701 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2024-05-12 12:49:18,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4625 conditions, 2259 events. 1213/2259 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14397 event pairs, 769 based on Foata normal form. 4/2215 useless extension candidates. Maximal degree in co-relation 4610. Up to 1756 conditions per place. [2024-05-12 12:49:18,711 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 46 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-05-12 12:49:18,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 308 flow [2024-05-12 12:49:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:49:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:49:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-05-12 12:49:18,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2024-05-12 12:49:18,713 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 122 flow. Second operand 4 states and 138 transitions. [2024-05-12 12:49:18,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 308 flow [2024-05-12 12:49:18,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:18,715 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 194 flow [2024-05-12 12:49:18,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-05-12 12:49:18,715 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-05-12 12:49:18,716 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 194 flow [2024-05-12 12:49:18,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:18,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:18,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:18,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:49:18,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:18,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2064579860, now seen corresponding path program 1 times [2024-05-12 12:49:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:18,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211780875] [2024-05-12 12:49:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:18,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:18,853 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 12:49:18,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211780875] [2024-05-12 12:49:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211780875] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:18,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:18,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:49:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932123561] [2024-05-12 12:49:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:18,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:49:18,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:49:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:49:18,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-05-12 12:49:18,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:18,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:18,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-05-12 12:49:18,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:19,064 INFO L124 PetriNetUnfolderBase]: 1043/1932 cut-off events. [2024-05-12 12:49:19,064 INFO L125 PetriNetUnfolderBase]: For 1157/1165 co-relation queries the response was YES. [2024-05-12 12:49:19,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4748 conditions, 1932 events. 1043/1932 cut-off events. For 1157/1165 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12161 event pairs, 473 based on Foata normal form. 2/1893 useless extension candidates. Maximal degree in co-relation 4730. Up to 1522 conditions per place. [2024-05-12 12:49:19,077 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 46 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-05-12 12:49:19,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 350 flow [2024-05-12 12:49:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:49:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:49:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-05-12 12:49:19,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-05-12 12:49:19,079 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 194 flow. Second operand 4 states and 133 transitions. [2024-05-12 12:49:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 350 flow [2024-05-12 12:49:19,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 346 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 12:49:19,082 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 232 flow [2024-05-12 12:49:19,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-05-12 12:49:19,082 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-05-12 12:49:19,083 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 232 flow [2024-05-12 12:49:19,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:19,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:19,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:19,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:49:19,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:19,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:19,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1688887917, now seen corresponding path program 1 times [2024-05-12 12:49:19,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:19,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056123198] [2024-05-12 12:49:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:19,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:19,245 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 12:49:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:19,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056123198] [2024-05-12 12:49:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056123198] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:19,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718366443] [2024-05-12 12:49:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:19,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:19,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 232 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 12:49:19,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:19,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:19,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:19,543 INFO L124 PetriNetUnfolderBase]: 1562/2616 cut-off events. [2024-05-12 12:49:19,543 INFO L125 PetriNetUnfolderBase]: For 2423/2423 co-relation queries the response was YES. [2024-05-12 12:49:19,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7038 conditions, 2616 events. 1562/2616 cut-off events. For 2423/2423 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15643 event pairs, 409 based on Foata normal form. 8/2621 useless extension candidates. Maximal degree in co-relation 7017. Up to 2162 conditions per place. [2024-05-12 12:49:19,557 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 66 selfloop transitions, 18 changer transitions 0/99 dead transitions. [2024-05-12 12:49:19,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 99 transitions, 522 flow [2024-05-12 12:49:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-05-12 12:49:19,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-05-12 12:49:19,559 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 232 flow. Second operand 6 states and 196 transitions. [2024-05-12 12:49:19,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 99 transitions, 522 flow [2024-05-12 12:49:19,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 504 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:19,563 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 302 flow [2024-05-12 12:49:19,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-05-12 12:49:19,564 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 12 predicate places. [2024-05-12 12:49:19,564 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 302 flow [2024-05-12 12:49:19,564 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 12:49:19,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:19,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:19,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:49:19,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:19,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash 207005067, now seen corresponding path program 1 times [2024-05-12 12:49:19,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:19,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773718573] [2024-05-12 12:49:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:19,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:19,737 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 12:49:19,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:19,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773718573] [2024-05-12 12:49:19,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773718573] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:19,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:19,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:49:19,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648160857] [2024-05-12 12:49:19,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:19,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:49:19,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:19,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:49:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:49:19,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:19,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:19,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:19,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:19,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:20,000 INFO L124 PetriNetUnfolderBase]: 1606/2741 cut-off events. [2024-05-12 12:49:20,000 INFO L125 PetriNetUnfolderBase]: For 3907/3907 co-relation queries the response was YES. [2024-05-12 12:49:20,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 2741 events. 1606/2741 cut-off events. For 3907/3907 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16711 event pairs, 473 based on Foata normal form. 3/2737 useless extension candidates. Maximal degree in co-relation 7981. Up to 2228 conditions per place. [2024-05-12 12:49:20,018 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 70 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-05-12 12:49:20,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 660 flow [2024-05-12 12:49:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-05-12 12:49:20,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6775510204081633 [2024-05-12 12:49:20,024 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 302 flow. Second operand 5 states and 166 transitions. [2024-05-12 12:49:20,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 660 flow [2024-05-12 12:49:20,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 614 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:20,032 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 410 flow [2024-05-12 12:49:20,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=410, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2024-05-12 12:49:20,033 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-05-12 12:49:20,034 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 410 flow [2024-05-12 12:49:20,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:20,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:20,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:49:20,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:20,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash 586529697, now seen corresponding path program 2 times [2024-05-12 12:49:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:20,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868693943] [2024-05-12 12:49:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868693943] [2024-05-12 12:49:20,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868693943] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:20,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:20,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:49:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885226192] [2024-05-12 12:49:20,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:49:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:49:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:49:20,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:20,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:20,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:20,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:20,438 INFO L124 PetriNetUnfolderBase]: 1600/2715 cut-off events. [2024-05-12 12:49:20,438 INFO L125 PetriNetUnfolderBase]: For 5636/5636 co-relation queries the response was YES. [2024-05-12 12:49:20,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8687 conditions, 2715 events. 1600/2715 cut-off events. For 5636/5636 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16450 event pairs, 475 based on Foata normal form. 3/2713 useless extension candidates. Maximal degree in co-relation 8662. Up to 2224 conditions per place. [2024-05-12 12:49:20,456 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 68 selfloop transitions, 20 changer transitions 0/103 dead transitions. [2024-05-12 12:49:20,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 678 flow [2024-05-12 12:49:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-05-12 12:49:20,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-05-12 12:49:20,458 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 410 flow. Second operand 5 states and 161 transitions. [2024-05-12 12:49:20,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 678 flow [2024-05-12 12:49:20,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 103 transitions, 650 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-05-12 12:49:20,467 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 456 flow [2024-05-12 12:49:20,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-05-12 12:49:20,469 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2024-05-12 12:49:20,470 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 456 flow [2024-05-12 12:49:20,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:20,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:20,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:49:20,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:20,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1597844664, now seen corresponding path program 1 times [2024-05-12 12:49:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:20,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862780556] [2024-05-12 12:49:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:20,631 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 12:49:20,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:20,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862780556] [2024-05-12 12:49:20,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862780556] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:20,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:20,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:49:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439389046] [2024-05-12 12:49:20,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:20,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:49:20,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:20,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:49:20,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:49:20,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:49:20,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 456 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:20,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:49:20,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:20,866 INFO L124 PetriNetUnfolderBase]: 1479/2599 cut-off events. [2024-05-12 12:49:20,866 INFO L125 PetriNetUnfolderBase]: For 6188/6188 co-relation queries the response was YES. [2024-05-12 12:49:20,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2599 events. 1479/2599 cut-off events. For 6188/6188 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16348 event pairs, 726 based on Foata normal form. 3/2584 useless extension candidates. Maximal degree in co-relation 8312. Up to 2104 conditions per place. [2024-05-12 12:49:20,888 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 54 selfloop transitions, 16 changer transitions 0/91 dead transitions. [2024-05-12 12:49:20,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 624 flow [2024-05-12 12:49:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:49:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:49:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-05-12 12:49:20,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 12:49:20,890 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 456 flow. Second operand 4 states and 128 transitions. [2024-05-12 12:49:20,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 624 flow [2024-05-12 12:49:20,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 582 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:20,899 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 457 flow [2024-05-12 12:49:20,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=457, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-05-12 12:49:20,900 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2024-05-12 12:49:20,900 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 457 flow [2024-05-12 12:49:20,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:20,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:20,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:49:20,901 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:20,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1629115542, now seen corresponding path program 1 times [2024-05-12 12:49:20,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:20,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557724522] [2024-05-12 12:49:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:21,069 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 12:49:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:21,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557724522] [2024-05-12 12:49:21,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557724522] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:21,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:21,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:21,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535002708] [2024-05-12 12:49:21,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:21,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:21,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:21,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:21,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 457 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:21,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:21,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:21,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:21,366 INFO L124 PetriNetUnfolderBase]: 1610/2727 cut-off events. [2024-05-12 12:49:21,366 INFO L125 PetriNetUnfolderBase]: For 7125/7125 co-relation queries the response was YES. [2024-05-12 12:49:21,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 2727 events. 1610/2727 cut-off events. For 7125/7125 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16462 event pairs, 527 based on Foata normal form. 3/2720 useless extension candidates. Maximal degree in co-relation 8901. Up to 2268 conditions per place. [2024-05-12 12:49:21,381 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 80 selfloop transitions, 21 changer transitions 0/116 dead transitions. [2024-05-12 12:49:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 767 flow [2024-05-12 12:49:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:21,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-05-12 12:49:21,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-05-12 12:49:21,383 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 457 flow. Second operand 6 states and 194 transitions. [2024-05-12 12:49:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 767 flow [2024-05-12 12:49:21,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 727 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:21,391 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 504 flow [2024-05-12 12:49:21,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=504, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-05-12 12:49:21,393 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-05-12 12:49:21,393 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 504 flow [2024-05-12 12:49:21,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:21,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:21,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:21,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:49:21,394 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:21,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:21,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1363401770, now seen corresponding path program 2 times [2024-05-12 12:49:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:21,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240104552] [2024-05-12 12:49:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:21,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:21,548 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 12:49:21,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:21,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240104552] [2024-05-12 12:49:21,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240104552] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:21,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:21,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:21,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464236409] [2024-05-12 12:49:21,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:21,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:21,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:21,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:21,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:21,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:21,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 504 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:21,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:21,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:21,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:21,830 INFO L124 PetriNetUnfolderBase]: 1652/2843 cut-off events. [2024-05-12 12:49:21,830 INFO L125 PetriNetUnfolderBase]: For 9005/9005 co-relation queries the response was YES. [2024-05-12 12:49:21,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9871 conditions, 2843 events. 1652/2843 cut-off events. For 9005/9005 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17585 event pairs, 456 based on Foata normal form. 3/2838 useless extension candidates. Maximal degree in co-relation 9841. Up to 2174 conditions per place. [2024-05-12 12:49:21,850 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 74 selfloop transitions, 39 changer transitions 0/128 dead transitions. [2024-05-12 12:49:21,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 952 flow [2024-05-12 12:49:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2024-05-12 12:49:21,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-05-12 12:49:21,851 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 504 flow. Second operand 6 states and 198 transitions. [2024-05-12 12:49:21,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 952 flow [2024-05-12 12:49:21,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 128 transitions, 895 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:21,862 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 636 flow [2024-05-12 12:49:21,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=636, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-05-12 12:49:21,863 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-05-12 12:49:21,863 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 636 flow [2024-05-12 12:49:21,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:21,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:21,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:21,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:49:21,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:21,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1363408714, now seen corresponding path program 1 times [2024-05-12 12:49:21,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:21,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390617652] [2024-05-12 12:49:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:22,034 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 12:49:22,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:22,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390617652] [2024-05-12 12:49:22,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390617652] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:22,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:22,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:22,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875339895] [2024-05-12 12:49:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:22,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:22,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:22,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:22,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:22,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:22,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 636 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:22,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:22,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:22,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:22,336 INFO L124 PetriNetUnfolderBase]: 1694/2900 cut-off events. [2024-05-12 12:49:22,336 INFO L125 PetriNetUnfolderBase]: For 11719/11719 co-relation queries the response was YES. [2024-05-12 12:49:22,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10757 conditions, 2900 events. 1694/2900 cut-off events. For 11719/11719 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17917 event pairs, 456 based on Foata normal form. 3/2894 useless extension candidates. Maximal degree in co-relation 10726. Up to 2259 conditions per place. [2024-05-12 12:49:22,353 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 90 selfloop transitions, 34 changer transitions 0/139 dead transitions. [2024-05-12 12:49:22,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 139 transitions, 1116 flow [2024-05-12 12:49:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-05-12 12:49:22,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6700680272108843 [2024-05-12 12:49:22,355 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 636 flow. Second operand 6 states and 197 transitions. [2024-05-12 12:49:22,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 139 transitions, 1116 flow [2024-05-12 12:49:22,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 139 transitions, 1078 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:22,367 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 807 flow [2024-05-12 12:49:22,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=807, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-05-12 12:49:22,368 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-05-12 12:49:22,369 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 807 flow [2024-05-12 12:49:22,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:22,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:22,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:22,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:49:22,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:22,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash 848117260, now seen corresponding path program 3 times [2024-05-12 12:49:22,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:22,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220179636] [2024-05-12 12:49:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:22,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:22,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220179636] [2024-05-12 12:49:22,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220179636] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:22,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:22,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953251721] [2024-05-12 12:49:22,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:22,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:22,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:22,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:22,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 807 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:22,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:22,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:22,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:22,815 INFO L124 PetriNetUnfolderBase]: 1688/2867 cut-off events. [2024-05-12 12:49:22,816 INFO L125 PetriNetUnfolderBase]: For 14800/14800 co-relation queries the response was YES. [2024-05-12 12:49:22,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11558 conditions, 2867 events. 1688/2867 cut-off events. For 14800/14800 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17604 event pairs, 455 based on Foata normal form. 3/2859 useless extension candidates. Maximal degree in co-relation 11523. Up to 2228 conditions per place. [2024-05-12 12:49:22,834 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 85 selfloop transitions, 35 changer transitions 0/135 dead transitions. [2024-05-12 12:49:22,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 135 transitions, 1137 flow [2024-05-12 12:49:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-05-12 12:49:22,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-05-12 12:49:22,836 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 807 flow. Second operand 6 states and 191 transitions. [2024-05-12 12:49:22,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 135 transitions, 1137 flow [2024-05-12 12:49:22,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 135 transitions, 1088 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:22,852 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 837 flow [2024-05-12 12:49:22,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=837, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2024-05-12 12:49:22,852 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 38 predicate places. [2024-05-12 12:49:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 837 flow [2024-05-12 12:49:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:22,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:22,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:49:22,853 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:22,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -309778960, now seen corresponding path program 2 times [2024-05-12 12:49:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575021233] [2024-05-12 12:49:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:22,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:22,984 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 12:49:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:22,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575021233] [2024-05-12 12:49:22,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575021233] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:22,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:22,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402503569] [2024-05-12 12:49:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:22,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:22,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:22,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:23,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:23,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 837 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:23,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:23,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:23,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:23,326 INFO L124 PetriNetUnfolderBase]: 1718/2904 cut-off events. [2024-05-12 12:49:23,326 INFO L125 PetriNetUnfolderBase]: For 16577/16577 co-relation queries the response was YES. [2024-05-12 12:49:23,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12050 conditions, 2904 events. 1718/2904 cut-off events. For 16577/16577 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17730 event pairs, 439 based on Foata normal form. 3/2902 useless extension candidates. Maximal degree in co-relation 12012. Up to 2280 conditions per place. [2024-05-12 12:49:23,350 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 90 selfloop transitions, 35 changer transitions 0/140 dead transitions. [2024-05-12 12:49:23,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1266 flow [2024-05-12 12:49:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-05-12 12:49:23,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-05-12 12:49:23,352 INFO L175 Difference]: Start difference. First operand has 91 places, 106 transitions, 837 flow. Second operand 6 states and 193 transitions. [2024-05-12 12:49:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1266 flow [2024-05-12 12:49:23,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 140 transitions, 1189 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:23,370 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 884 flow [2024-05-12 12:49:23,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=884, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2024-05-12 12:49:23,370 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 40 predicate places. [2024-05-12 12:49:23,371 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 884 flow [2024-05-12 12:49:23,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:23,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:23,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:23,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:49:23,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:23,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1717353552, now seen corresponding path program 3 times [2024-05-12 12:49:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:23,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844327615] [2024-05-12 12:49:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:23,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:23,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844327615] [2024-05-12 12:49:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844327615] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:23,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327429157] [2024-05-12 12:49:23,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:23,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:23,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 884 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:23,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:23,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:23,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:23,861 INFO L124 PetriNetUnfolderBase]: 1754/3081 cut-off events. [2024-05-12 12:49:23,862 INFO L125 PetriNetUnfolderBase]: For 18665/18665 co-relation queries the response was YES. [2024-05-12 12:49:23,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12649 conditions, 3081 events. 1754/3081 cut-off events. For 18665/18665 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19472 event pairs, 708 based on Foata normal form. 3/3058 useless extension candidates. Maximal degree in co-relation 12610. Up to 2501 conditions per place. [2024-05-12 12:49:23,883 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 117 selfloop transitions, 18 changer transitions 0/150 dead transitions. [2024-05-12 12:49:23,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 150 transitions, 1345 flow [2024-05-12 12:49:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-05-12 12:49:23,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-05-12 12:49:23,885 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 884 flow. Second operand 7 states and 210 transitions. [2024-05-12 12:49:23,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 150 transitions, 1345 flow [2024-05-12 12:49:23,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1242 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:23,909 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 948 flow [2024-05-12 12:49:23,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=948, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2024-05-12 12:49:23,910 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-05-12 12:49:23,911 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 948 flow [2024-05-12 12:49:23,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:49:23,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:23,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:23,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:49:23,911 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:23,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1717364464, now seen corresponding path program 1 times [2024-05-12 12:49:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:23,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115323567] [2024-05-12 12:49:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:23,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:24,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:24,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115323567] [2024-05-12 12:49:24,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115323567] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:24,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:24,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455514433] [2024-05-12 12:49:24,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:24,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:24,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:24,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:49:24,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 948 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 12:49:24,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:24,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:49:24,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:24,384 INFO L124 PetriNetUnfolderBase]: 1611/2846 cut-off events. [2024-05-12 12:49:24,385 INFO L125 PetriNetUnfolderBase]: For 18839/18839 co-relation queries the response was YES. [2024-05-12 12:49:24,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11948 conditions, 2846 events. 1611/2846 cut-off events. For 18839/18839 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18056 event pairs, 377 based on Foata normal form. 4/2848 useless extension candidates. Maximal degree in co-relation 11906. Up to 2180 conditions per place. [2024-05-12 12:49:24,403 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 103 selfloop transitions, 12 changer transitions 0/149 dead transitions. [2024-05-12 12:49:24,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 149 transitions, 1274 flow [2024-05-12 12:49:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-05-12 12:49:24,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-05-12 12:49:24,405 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 948 flow. Second operand 6 states and 187 transitions. [2024-05-12 12:49:24,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 149 transitions, 1274 flow [2024-05-12 12:49:24,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 149 transitions, 1216 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:24,428 INFO L231 Difference]: Finished difference. Result has 102 places, 121 transitions, 955 flow [2024-05-12 12:49:24,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=955, PETRI_PLACES=102, PETRI_TRANSITIONS=121} [2024-05-12 12:49:24,430 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2024-05-12 12:49:24,430 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 121 transitions, 955 flow [2024-05-12 12:49:24,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 12:49:24,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:24,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:24,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:49:24,431 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:24,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:24,431 INFO L85 PathProgramCache]: Analyzing trace with hash 673528981, now seen corresponding path program 1 times [2024-05-12 12:49:24,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:24,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079810660] [2024-05-12 12:49:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:24,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:24,559 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 12:49:24,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:24,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079810660] [2024-05-12 12:49:24,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079810660] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:24,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:24,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:49:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533649646] [2024-05-12 12:49:24,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:49:24,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:49:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:49:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:24,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 121 transitions, 955 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 12:49:24,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:24,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:24,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:24,822 INFO L124 PetriNetUnfolderBase]: 1768/3024 cut-off events. [2024-05-12 12:49:24,823 INFO L125 PetriNetUnfolderBase]: For 21474/21474 co-relation queries the response was YES. [2024-05-12 12:49:24,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12816 conditions, 3024 events. 1768/3024 cut-off events. For 21474/21474 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18758 event pairs, 456 based on Foata normal form. 2/3021 useless extension candidates. Maximal degree in co-relation 12773. Up to 2450 conditions per place. [2024-05-12 12:49:24,892 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 104 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-05-12 12:49:24,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 144 transitions, 1338 flow [2024-05-12 12:49:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-05-12 12:49:24,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636734693877551 [2024-05-12 12:49:24,893 INFO L175 Difference]: Start difference. First operand has 102 places, 121 transitions, 955 flow. Second operand 5 states and 156 transitions. [2024-05-12 12:49:24,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 144 transitions, 1338 flow [2024-05-12 12:49:24,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1291 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:24,923 INFO L231 Difference]: Finished difference. Result has 103 places, 125 transitions, 1022 flow [2024-05-12 12:49:24,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1022, PETRI_PLACES=103, PETRI_TRANSITIONS=125} [2024-05-12 12:49:24,924 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-05-12 12:49:24,924 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 125 transitions, 1022 flow [2024-05-12 12:49:24,924 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 12:49:24,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:24,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:24,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:49:24,925 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:24,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2069512905, now seen corresponding path program 2 times [2024-05-12 12:49:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:24,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023296700] [2024-05-12 12:49:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:24,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:25,056 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 12:49:25,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:25,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023296700] [2024-05-12 12:49:25,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023296700] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:25,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:25,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:49:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922750133] [2024-05-12 12:49:25,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:25,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:49:25,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:49:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:49:25,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:25,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 125 transitions, 1022 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 12:49:25,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:25,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:25,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:25,343 INFO L124 PetriNetUnfolderBase]: 1756/3039 cut-off events. [2024-05-12 12:49:25,344 INFO L125 PetriNetUnfolderBase]: For 23499/23499 co-relation queries the response was YES. [2024-05-12 12:49:25,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12837 conditions, 3039 events. 1756/3039 cut-off events. For 23499/23499 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19162 event pairs, 478 based on Foata normal form. 2/3031 useless extension candidates. Maximal degree in co-relation 12793. Up to 2436 conditions per place. [2024-05-12 12:49:25,366 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 98 selfloop transitions, 27 changer transitions 0/140 dead transitions. [2024-05-12 12:49:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 1306 flow [2024-05-12 12:49:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-05-12 12:49:25,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-05-12 12:49:25,368 INFO L175 Difference]: Start difference. First operand has 103 places, 125 transitions, 1022 flow. Second operand 5 states and 153 transitions. [2024-05-12 12:49:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 1306 flow [2024-05-12 12:49:25,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 140 transitions, 1268 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:25,427 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1045 flow [2024-05-12 12:49:25,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1045, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-05-12 12:49:25,428 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 53 predicate places. [2024-05-12 12:49:25,428 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1045 flow [2024-05-12 12:49:25,428 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 12:49:25,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:25,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:49:25,429 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:25,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash 680204149, now seen corresponding path program 1 times [2024-05-12 12:49:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:25,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534488523] [2024-05-12 12:49:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534488523] [2024-05-12 12:49:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534488523] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:25,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:25,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:49:25,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376706485] [2024-05-12 12:49:25,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:25,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:49:25,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:49:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:49:25,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:49:25,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1045 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 12:49:25,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:25,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:49:25,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:25,896 INFO L124 PetriNetUnfolderBase]: 1669/2961 cut-off events. [2024-05-12 12:49:25,896 INFO L125 PetriNetUnfolderBase]: For 24599/24599 co-relation queries the response was YES. [2024-05-12 12:49:25,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12459 conditions, 2961 events. 1669/2961 cut-off events. For 24599/24599 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19162 event pairs, 693 based on Foata normal form. 3/2938 useless extension candidates. Maximal degree in co-relation 12414. Up to 2269 conditions per place. [2024-05-12 12:49:25,926 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 99 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-05-12 12:49:25,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1403 flow [2024-05-12 12:49:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-05-12 12:49:25,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6408163265306123 [2024-05-12 12:49:25,928 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1045 flow. Second operand 5 states and 157 transitions. [2024-05-12 12:49:25,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1403 flow [2024-05-12 12:49:25,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 148 transitions, 1305 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:25,962 INFO L231 Difference]: Finished difference. Result has 105 places, 132 transitions, 1055 flow [2024-05-12 12:49:25,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1055, PETRI_PLACES=105, PETRI_TRANSITIONS=132} [2024-05-12 12:49:25,962 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 52 predicate places. [2024-05-12 12:49:25,963 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 132 transitions, 1055 flow [2024-05-12 12:49:25,963 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 12:49:25,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:25,963 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 12:49:25,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:49:25,963 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:25,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2080200201, now seen corresponding path program 1 times [2024-05-12 12:49:25,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:25,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407633976] [2024-05-12 12:49:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:25,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:26,132 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 12:49:26,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:26,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407633976] [2024-05-12 12:49:26,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407633976] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:26,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:26,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:26,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867234637] [2024-05-12 12:49:26,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:26,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:26,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:26,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:26,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:26,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:26,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 132 transitions, 1055 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:26,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:26,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:26,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:26,613 INFO L124 PetriNetUnfolderBase]: 1878/3284 cut-off events. [2024-05-12 12:49:26,613 INFO L125 PetriNetUnfolderBase]: For 29560/29560 co-relation queries the response was YES. [2024-05-12 12:49:26,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14352 conditions, 3284 events. 1878/3284 cut-off events. For 29560/29560 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20963 event pairs, 511 based on Foata normal form. 6/3259 useless extension candidates. Maximal degree in co-relation 14308. Up to 2495 conditions per place. [2024-05-12 12:49:26,635 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 142 selfloop transitions, 30 changer transitions 0/187 dead transitions. [2024-05-12 12:49:26,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 187 transitions, 1659 flow [2024-05-12 12:49:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 255 transitions. [2024-05-12 12:49:26,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6505102040816326 [2024-05-12 12:49:26,637 INFO L175 Difference]: Start difference. First operand has 105 places, 132 transitions, 1055 flow. Second operand 8 states and 255 transitions. [2024-05-12 12:49:26,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 187 transitions, 1659 flow [2024-05-12 12:49:26,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 187 transitions, 1626 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:26,669 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1180 flow [2024-05-12 12:49:26,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1180, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-05-12 12:49:26,670 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-05-12 12:49:26,670 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1180 flow [2024-05-12 12:49:26,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:26,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:26,670 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 12:49:26,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:49:26,671 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:26,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1315622035, now seen corresponding path program 2 times [2024-05-12 12:49:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:26,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790453540] [2024-05-12 12:49:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:26,830 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 12:49:26,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:26,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790453540] [2024-05-12 12:49:26,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790453540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:26,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:26,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:26,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430177252] [2024-05-12 12:49:26,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:26,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:26,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:26,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1180 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:26,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:26,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:26,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:27,233 INFO L124 PetriNetUnfolderBase]: 1865/3143 cut-off events. [2024-05-12 12:49:27,233 INFO L125 PetriNetUnfolderBase]: For 31693/31693 co-relation queries the response was YES. [2024-05-12 12:49:27,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14642 conditions, 3143 events. 1865/3143 cut-off events. For 31693/31693 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19538 event pairs, 412 based on Foata normal form. 6/3144 useless extension candidates. Maximal degree in co-relation 14595. Up to 2588 conditions per place. [2024-05-12 12:49:27,256 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 139 selfloop transitions, 24 changer transitions 0/178 dead transitions. [2024-05-12 12:49:27,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 178 transitions, 1602 flow [2024-05-12 12:49:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-05-12 12:49:27,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501457725947521 [2024-05-12 12:49:27,258 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1180 flow. Second operand 7 states and 223 transitions. [2024-05-12 12:49:27,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 178 transitions, 1602 flow [2024-05-12 12:49:27,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 178 transitions, 1507 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:27,295 INFO L231 Difference]: Finished difference. Result has 115 places, 138 transitions, 1141 flow [2024-05-12 12:49:27,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1141, PETRI_PLACES=115, PETRI_TRANSITIONS=138} [2024-05-12 12:49:27,296 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 62 predicate places. [2024-05-12 12:49:27,296 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 138 transitions, 1141 flow [2024-05-12 12:49:27,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:27,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:27,297 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 12:49:27,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:49:27,297 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:27,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:27,297 INFO L85 PathProgramCache]: Analyzing trace with hash -16819671, now seen corresponding path program 1 times [2024-05-12 12:49:27,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:27,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962573116] [2024-05-12 12:49:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:27,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:27,427 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 12:49:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962573116] [2024-05-12 12:49:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962573116] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:27,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:27,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833043963] [2024-05-12 12:49:27,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:27,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:27,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:27,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 138 transitions, 1141 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:27,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:27,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:27,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:27,834 INFO L124 PetriNetUnfolderBase]: 1893/3269 cut-off events. [2024-05-12 12:49:27,834 INFO L125 PetriNetUnfolderBase]: For 33504/33504 co-relation queries the response was YES. [2024-05-12 12:49:27,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14886 conditions, 3269 events. 1893/3269 cut-off events. For 33504/33504 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20745 event pairs, 479 based on Foata normal form. 3/3267 useless extension candidates. Maximal degree in co-relation 14837. Up to 2647 conditions per place. [2024-05-12 12:49:27,857 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 141 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2024-05-12 12:49:27,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 1621 flow [2024-05-12 12:49:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-05-12 12:49:27,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501457725947521 [2024-05-12 12:49:27,860 INFO L175 Difference]: Start difference. First operand has 115 places, 138 transitions, 1141 flow. Second operand 7 states and 223 transitions. [2024-05-12 12:49:27,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 1621 flow [2024-05-12 12:49:27,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 181 transitions, 1565 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:27,903 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1206 flow [2024-05-12 12:49:27,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1206, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2024-05-12 12:49:27,904 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 63 predicate places. [2024-05-12 12:49:27,904 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1206 flow [2024-05-12 12:49:27,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:27,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:27,904 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 12:49:27,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:49:27,904 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:27,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash 264105673, now seen corresponding path program 3 times [2024-05-12 12:49:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865566333] [2024-05-12 12:49:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:28,034 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 12:49:28,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:28,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865566333] [2024-05-12 12:49:28,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865566333] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:28,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:28,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:28,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172015209] [2024-05-12 12:49:28,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:28,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:28,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:28,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:28,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1206 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:28,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:28,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:28,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:28,431 INFO L124 PetriNetUnfolderBase]: 1938/3284 cut-off events. [2024-05-12 12:49:28,432 INFO L125 PetriNetUnfolderBase]: For 38307/38307 co-relation queries the response was YES. [2024-05-12 12:49:28,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15707 conditions, 3284 events. 1938/3284 cut-off events. For 38307/38307 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20652 event pairs, 408 based on Foata normal form. 6/3278 useless extension candidates. Maximal degree in co-relation 15657. Up to 2537 conditions per place. [2024-05-12 12:49:28,457 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 122 selfloop transitions, 46 changer transitions 0/183 dead transitions. [2024-05-12 12:49:28,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 183 transitions, 1724 flow [2024-05-12 12:49:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-05-12 12:49:28,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559766763848397 [2024-05-12 12:49:28,459 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1206 flow. Second operand 7 states and 225 transitions. [2024-05-12 12:49:28,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 183 transitions, 1724 flow [2024-05-12 12:49:28,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 183 transitions, 1633 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:28,509 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1273 flow [2024-05-12 12:49:28,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1273, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-05-12 12:49:28,510 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 65 predicate places. [2024-05-12 12:49:28,510 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1273 flow [2024-05-12 12:49:28,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:28,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:28,511 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 12:49:28,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:49:28,511 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:28,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash -701733005, now seen corresponding path program 2 times [2024-05-12 12:49:28,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:28,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846019333] [2024-05-12 12:49:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:28,641 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 12:49:28,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:28,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846019333] [2024-05-12 12:49:28,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846019333] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:28,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:28,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069975859] [2024-05-12 12:49:28,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:28,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:28,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:28,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:28,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1273 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:28,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:28,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:28,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:29,042 INFO L124 PetriNetUnfolderBase]: 2016/3431 cut-off events. [2024-05-12 12:49:29,043 INFO L125 PetriNetUnfolderBase]: For 44328/44328 co-relation queries the response was YES. [2024-05-12 12:49:29,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16965 conditions, 3431 events. 2016/3431 cut-off events. For 44328/44328 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21827 event pairs, 427 based on Foata normal form. 3/3414 useless extension candidates. Maximal degree in co-relation 16914. Up to 2403 conditions per place. [2024-05-12 12:49:29,068 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 112 selfloop transitions, 74 changer transitions 0/201 dead transitions. [2024-05-12 12:49:29,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 201 transitions, 2173 flow [2024-05-12 12:49:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-05-12 12:49:29,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793002915451894 [2024-05-12 12:49:29,070 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1273 flow. Second operand 7 states and 233 transitions. [2024-05-12 12:49:29,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 201 transitions, 2173 flow [2024-05-12 12:49:29,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 2039 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:29,123 INFO L231 Difference]: Finished difference. Result has 120 places, 160 transitions, 1542 flow [2024-05-12 12:49:29,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1542, PETRI_PLACES=120, PETRI_TRANSITIONS=160} [2024-05-12 12:49:29,123 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 67 predicate places. [2024-05-12 12:49:29,124 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 160 transitions, 1542 flow [2024-05-12 12:49:29,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:29,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:29,124 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 12:49:29,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:49:29,124 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:29,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:29,125 INFO L85 PathProgramCache]: Analyzing trace with hash -695066765, now seen corresponding path program 3 times [2024-05-12 12:49:29,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:29,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686241125] [2024-05-12 12:49:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:29,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:29,245 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 12:49:29,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686241125] [2024-05-12 12:49:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686241125] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:29,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:29,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:29,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167178528] [2024-05-12 12:49:29,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:29,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:29,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:29,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:29,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 160 transitions, 1542 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:29,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:29,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:29,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:29,609 INFO L124 PetriNetUnfolderBase]: 2008/3403 cut-off events. [2024-05-12 12:49:29,609 INFO L125 PetriNetUnfolderBase]: For 47438/47438 co-relation queries the response was YES. [2024-05-12 12:49:29,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17266 conditions, 3403 events. 2008/3403 cut-off events. For 47438/47438 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21563 event pairs, 426 based on Foata normal form. 3/3389 useless extension candidates. Maximal degree in co-relation 17214. Up to 2396 conditions per place. [2024-05-12 12:49:29,632 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 109 selfloop transitions, 75 changer transitions 0/199 dead transitions. [2024-05-12 12:49:29,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 199 transitions, 2126 flow [2024-05-12 12:49:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-05-12 12:49:29,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705539358600583 [2024-05-12 12:49:29,634 INFO L175 Difference]: Start difference. First operand has 120 places, 160 transitions, 1542 flow. Second operand 7 states and 230 transitions. [2024-05-12 12:49:29,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 199 transitions, 2126 flow [2024-05-12 12:49:29,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 199 transitions, 2000 flow, removed 55 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:29,697 INFO L231 Difference]: Finished difference. Result has 126 places, 160 transitions, 1575 flow [2024-05-12 12:49:29,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1575, PETRI_PLACES=126, PETRI_TRANSITIONS=160} [2024-05-12 12:49:29,698 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 73 predicate places. [2024-05-12 12:49:29,698 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 160 transitions, 1575 flow [2024-05-12 12:49:29,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:29,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:29,698 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 12:49:29,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:49:29,699 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:29,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2025608619, now seen corresponding path program 1 times [2024-05-12 12:49:29,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:29,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692603462] [2024-05-12 12:49:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:29,821 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 12:49:29,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:29,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692603462] [2024-05-12 12:49:29,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692603462] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:29,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:29,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:29,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010702086] [2024-05-12 12:49:29,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:29,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:29,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:29,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:29,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:29,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 160 transitions, 1575 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:29,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:29,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:29,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:30,271 INFO L124 PetriNetUnfolderBase]: 2053/3448 cut-off events. [2024-05-12 12:49:30,271 INFO L125 PetriNetUnfolderBase]: For 52283/52283 co-relation queries the response was YES. [2024-05-12 12:49:30,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17936 conditions, 3448 events. 2053/3448 cut-off events. For 52283/52283 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21675 event pairs, 413 based on Foata normal form. 6/3436 useless extension candidates. Maximal degree in co-relation 17881. Up to 2695 conditions per place. [2024-05-12 12:49:30,299 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 136 selfloop transitions, 51 changer transitions 0/202 dead transitions. [2024-05-12 12:49:30,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 2189 flow [2024-05-12 12:49:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-05-12 12:49:30,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559766763848397 [2024-05-12 12:49:30,300 INFO L175 Difference]: Start difference. First operand has 126 places, 160 transitions, 1575 flow. Second operand 7 states and 225 transitions. [2024-05-12 12:49:30,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 2189 flow [2024-05-12 12:49:30,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 202 transitions, 2060 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:30,369 INFO L231 Difference]: Finished difference. Result has 128 places, 163 transitions, 1618 flow [2024-05-12 12:49:30,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1618, PETRI_PLACES=128, PETRI_TRANSITIONS=163} [2024-05-12 12:49:30,369 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-05-12 12:49:30,369 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 163 transitions, 1618 flow [2024-05-12 12:49:30,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:30,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:30,370 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 12:49:30,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:49:30,370 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:30,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1003069397, now seen corresponding path program 4 times [2024-05-12 12:49:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:30,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177821356] [2024-05-12 12:49:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:30,505 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 12:49:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:30,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177821356] [2024-05-12 12:49:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177821356] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:30,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:30,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:30,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103737492] [2024-05-12 12:49:30,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:30,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:30,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:30,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:30,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:30,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 163 transitions, 1618 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:30,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:30,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:30,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:30,929 INFO L124 PetriNetUnfolderBase]: 2063/3492 cut-off events. [2024-05-12 12:49:30,930 INFO L125 PetriNetUnfolderBase]: For 55170/55170 co-relation queries the response was YES. [2024-05-12 12:49:30,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18263 conditions, 3492 events. 2063/3492 cut-off events. For 55170/55170 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22061 event pairs, 399 based on Foata normal form. 6/3491 useless extension candidates. Maximal degree in co-relation 18207. Up to 2715 conditions per place. [2024-05-12 12:49:30,958 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 144 selfloop transitions, 42 changer transitions 0/201 dead transitions. [2024-05-12 12:49:30,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 201 transitions, 2186 flow [2024-05-12 12:49:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-05-12 12:49:30,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641399416909621 [2024-05-12 12:49:30,960 INFO L175 Difference]: Start difference. First operand has 128 places, 163 transitions, 1618 flow. Second operand 7 states and 220 transitions. [2024-05-12 12:49:30,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 201 transitions, 2186 flow [2024-05-12 12:49:31,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 201 transitions, 2038 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:31,035 INFO L231 Difference]: Finished difference. Result has 130 places, 166 transitions, 1634 flow [2024-05-12 12:49:31,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1634, PETRI_PLACES=130, PETRI_TRANSITIONS=166} [2024-05-12 12:49:31,035 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 77 predicate places. [2024-05-12 12:49:31,035 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 166 transitions, 1634 flow [2024-05-12 12:49:31,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:31,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:31,036 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 12:49:31,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:49:31,036 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:31,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1462668719, now seen corresponding path program 4 times [2024-05-12 12:49:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:31,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22390327] [2024-05-12 12:49:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:31,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:31,152 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 12:49:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22390327] [2024-05-12 12:49:31,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22390327] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:31,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:31,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:31,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80672542] [2024-05-12 12:49:31,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:31,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:31,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:31,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:31,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:31,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:31,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 166 transitions, 1634 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:31,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:31,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:31,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:31,597 INFO L124 PetriNetUnfolderBase]: 2127/3645 cut-off events. [2024-05-12 12:49:31,597 INFO L125 PetriNetUnfolderBase]: For 61216/61216 co-relation queries the response was YES. [2024-05-12 12:49:31,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19140 conditions, 3645 events. 2127/3645 cut-off events. For 61216/61216 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23455 event pairs, 435 based on Foata normal form. 3/3634 useless extension candidates. Maximal degree in co-relation 19083. Up to 2536 conditions per place. [2024-05-12 12:49:31,621 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 123 selfloop transitions, 74 changer transitions 0/212 dead transitions. [2024-05-12 12:49:31,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 212 transitions, 2506 flow [2024-05-12 12:49:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-05-12 12:49:31,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647230320699709 [2024-05-12 12:49:31,623 INFO L175 Difference]: Start difference. First operand has 130 places, 166 transitions, 1634 flow. Second operand 7 states and 228 transitions. [2024-05-12 12:49:31,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 212 transitions, 2506 flow [2024-05-12 12:49:31,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 212 transitions, 2366 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:31,684 INFO L231 Difference]: Finished difference. Result has 132 places, 174 transitions, 1807 flow [2024-05-12 12:49:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1807, PETRI_PLACES=132, PETRI_TRANSITIONS=174} [2024-05-12 12:49:31,684 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-05-12 12:49:31,684 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 174 transitions, 1807 flow [2024-05-12 12:49:31,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:31,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:31,685 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 12:49:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:49:31,685 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:31,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1988606505, now seen corresponding path program 5 times [2024-05-12 12:49:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:31,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376350878] [2024-05-12 12:49:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:31,792 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 12:49:31,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:31,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376350878] [2024-05-12 12:49:31,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376350878] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:31,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:31,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:31,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028116004] [2024-05-12 12:49:31,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:31,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:31,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:31,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:31,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 1807 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:31,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:31,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:31,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:32,196 INFO L124 PetriNetUnfolderBase]: 2119/3594 cut-off events. [2024-05-12 12:49:32,197 INFO L125 PetriNetUnfolderBase]: For 61902/61902 co-relation queries the response was YES. [2024-05-12 12:49:32,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19027 conditions, 3594 events. 2119/3594 cut-off events. For 61902/61902 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22909 event pairs, 394 based on Foata normal form. 3/3590 useless extension candidates. Maximal degree in co-relation 18969. Up to 2529 conditions per place. [2024-05-12 12:49:32,225 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 120 selfloop transitions, 76 changer transitions 0/211 dead transitions. [2024-05-12 12:49:32,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 211 transitions, 2485 flow [2024-05-12 12:49:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-05-12 12:49:32,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-05-12 12:49:32,226 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 1807 flow. Second operand 7 states and 226 transitions. [2024-05-12 12:49:32,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 211 transitions, 2485 flow [2024-05-12 12:49:32,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 211 transitions, 2214 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:32,315 INFO L231 Difference]: Finished difference. Result has 135 places, 174 transitions, 1697 flow [2024-05-12 12:49:32,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1697, PETRI_PLACES=135, PETRI_TRANSITIONS=174} [2024-05-12 12:49:32,315 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 82 predicate places. [2024-05-12 12:49:32,315 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 174 transitions, 1697 flow [2024-05-12 12:49:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:32,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:32,316 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 12:49:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 12:49:32,316 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:32,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1641953833, now seen corresponding path program 6 times [2024-05-12 12:49:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:32,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106773637] [2024-05-12 12:49:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:32,448 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 12:49:32,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:32,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106773637] [2024-05-12 12:49:32,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106773637] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:32,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:32,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:32,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016062088] [2024-05-12 12:49:32,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:32,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:32,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:32,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:32,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:32,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:32,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 174 transitions, 1697 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:32,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:32,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:32,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:32,859 INFO L124 PetriNetUnfolderBase]: 2141/3624 cut-off events. [2024-05-12 12:49:32,859 INFO L125 PetriNetUnfolderBase]: For 62332/62332 co-relation queries the response was YES. [2024-05-12 12:49:32,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19053 conditions, 3624 events. 2141/3624 cut-off events. For 62332/62332 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23038 event pairs, 366 based on Foata normal form. 3/3625 useless extension candidates. Maximal degree in co-relation 18994. Up to 3020 conditions per place. [2024-05-12 12:49:32,886 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 178 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2024-05-12 12:49:32,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 217 transitions, 2334 flow [2024-05-12 12:49:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-05-12 12:49:32,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-05-12 12:49:32,887 INFO L175 Difference]: Start difference. First operand has 135 places, 174 transitions, 1697 flow. Second operand 8 states and 240 transitions. [2024-05-12 12:49:32,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 217 transitions, 2334 flow [2024-05-12 12:49:32,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 217 transitions, 2162 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:32,980 INFO L231 Difference]: Finished difference. Result has 139 places, 180 transitions, 1696 flow [2024-05-12 12:49:32,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1696, PETRI_PLACES=139, PETRI_TRANSITIONS=180} [2024-05-12 12:49:32,981 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 86 predicate places. [2024-05-12 12:49:32,981 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 180 transitions, 1696 flow [2024-05-12 12:49:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:32,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:32,981 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 12:49:32,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 12:49:32,981 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:32,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1462677647, now seen corresponding path program 2 times [2024-05-12 12:49:32,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:32,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293629105] [2024-05-12 12:49:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:32,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:33,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293629105] [2024-05-12 12:49:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293629105] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:33,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915550832] [2024-05-12 12:49:33,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:33,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:33,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:33,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:33,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:33,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 180 transitions, 1696 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:33,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:33,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:33,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:33,572 INFO L124 PetriNetUnfolderBase]: 2186/3778 cut-off events. [2024-05-12 12:49:33,573 INFO L125 PetriNetUnfolderBase]: For 67982/67982 co-relation queries the response was YES. [2024-05-12 12:49:33,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19335 conditions, 3778 events. 2186/3778 cut-off events. For 67982/67982 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 24562 event pairs, 439 based on Foata normal form. 6/3773 useless extension candidates. Maximal degree in co-relation 19274. Up to 2884 conditions per place. [2024-05-12 12:49:33,604 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 156 selfloop transitions, 48 changer transitions 0/219 dead transitions. [2024-05-12 12:49:33,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 219 transitions, 2366 flow [2024-05-12 12:49:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-05-12 12:49:33,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6443148688046647 [2024-05-12 12:49:33,605 INFO L175 Difference]: Start difference. First operand has 139 places, 180 transitions, 1696 flow. Second operand 7 states and 221 transitions. [2024-05-12 12:49:33,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 219 transitions, 2366 flow [2024-05-12 12:49:33,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 219 transitions, 2286 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:33,702 INFO L231 Difference]: Finished difference. Result has 141 places, 183 transitions, 1792 flow [2024-05-12 12:49:33,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1792, PETRI_PLACES=141, PETRI_TRANSITIONS=183} [2024-05-12 12:49:33,703 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 88 predicate places. [2024-05-12 12:49:33,703 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 183 transitions, 1792 flow [2024-05-12 12:49:33,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:33,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:33,704 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 12:49:33,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 12:49:33,704 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:33,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:33,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1109358735, now seen corresponding path program 3 times [2024-05-12 12:49:33,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:33,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390926063] [2024-05-12 12:49:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:33,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:33,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390926063] [2024-05-12 12:49:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390926063] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:33,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:33,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:33,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620874846] [2024-05-12 12:49:33,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:33,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:33,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:33,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:33,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 183 transitions, 1792 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:33,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:33,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:33,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:34,298 INFO L124 PetriNetUnfolderBase]: 2234/3897 cut-off events. [2024-05-12 12:49:34,299 INFO L125 PetriNetUnfolderBase]: For 75086/75086 co-relation queries the response was YES. [2024-05-12 12:49:34,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20355 conditions, 3897 events. 2234/3897 cut-off events. For 75086/75086 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25554 event pairs, 711 based on Foata normal form. 6/3875 useless extension candidates. Maximal degree in co-relation 20293. Up to 3151 conditions per place. [2024-05-12 12:49:34,331 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 188 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-05-12 12:49:34,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 224 transitions, 2428 flow [2024-05-12 12:49:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:34,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-05-12 12:49:34,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096938775510204 [2024-05-12 12:49:34,333 INFO L175 Difference]: Start difference. First operand has 141 places, 183 transitions, 1792 flow. Second operand 8 states and 239 transitions. [2024-05-12 12:49:34,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 224 transitions, 2428 flow [2024-05-12 12:49:34,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 224 transitions, 2276 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:34,451 INFO L231 Difference]: Finished difference. Result has 144 places, 186 transitions, 1768 flow [2024-05-12 12:49:34,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1768, PETRI_PLACES=144, PETRI_TRANSITIONS=186} [2024-05-12 12:49:34,453 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 91 predicate places. [2024-05-12 12:49:34,453 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 186 transitions, 1768 flow [2024-05-12 12:49:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:34,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:34,453 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 12:49:34,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 12:49:34,454 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:34,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1119834255, now seen corresponding path program 4 times [2024-05-12 12:49:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:34,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34324142] [2024-05-12 12:49:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:34,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:34,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:34,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34324142] [2024-05-12 12:49:34,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34324142] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:34,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:34,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:49:34,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359923542] [2024-05-12 12:49:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:34,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:49:34,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:49:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:49:34,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:34,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 186 transitions, 1768 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:34,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:34,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:34,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:35,141 INFO L124 PetriNetUnfolderBase]: 2293/3984 cut-off events. [2024-05-12 12:49:35,141 INFO L125 PetriNetUnfolderBase]: For 80174/80174 co-relation queries the response was YES. [2024-05-12 12:49:35,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21005 conditions, 3984 events. 2293/3984 cut-off events. For 80174/80174 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26184 event pairs, 682 based on Foata normal form. 6/3961 useless extension candidates. Maximal degree in co-relation 20942. Up to 3096 conditions per place. [2024-05-12 12:49:35,171 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 195 selfloop transitions, 25 changer transitions 0/235 dead transitions. [2024-05-12 12:49:35,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 235 transitions, 2564 flow [2024-05-12 12:49:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-05-12 12:49:35,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 12:49:35,173 INFO L175 Difference]: Start difference. First operand has 144 places, 186 transitions, 1768 flow. Second operand 8 states and 245 transitions. [2024-05-12 12:49:35,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 235 transitions, 2564 flow [2024-05-12 12:49:35,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 235 transitions, 2460 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:35,309 INFO L231 Difference]: Finished difference. Result has 147 places, 192 transitions, 1877 flow [2024-05-12 12:49:35,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1877, PETRI_PLACES=147, PETRI_TRANSITIONS=192} [2024-05-12 12:49:35,310 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 94 predicate places. [2024-05-12 12:49:35,310 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 192 transitions, 1877 flow [2024-05-12 12:49:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 12:49:35,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:35,310 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 12:49:35,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 12:49:35,310 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:35,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash -232109848, now seen corresponding path program 1 times [2024-05-12 12:49:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:35,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036026220] [2024-05-12 12:49:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:35,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:35,434 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 12:49:35,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:35,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036026220] [2024-05-12 12:49:35,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036026220] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:35,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:35,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:49:35,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733193464] [2024-05-12 12:49:35,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:35,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:49:35,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:49:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:49:35,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:49:35,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 192 transitions, 1877 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 12:49:35,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:35,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:49:35,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:35,835 INFO L124 PetriNetUnfolderBase]: 2152/3906 cut-off events. [2024-05-12 12:49:35,835 INFO L125 PetriNetUnfolderBase]: For 83709/83715 co-relation queries the response was YES. [2024-05-12 12:49:35,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20475 conditions, 3906 events. 2152/3906 cut-off events. For 83709/83715 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26763 event pairs, 713 based on Foata normal form. 8/3879 useless extension candidates. Maximal degree in co-relation 20410. Up to 2917 conditions per place. [2024-05-12 12:49:35,867 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 160 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2024-05-12 12:49:35,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 217 transitions, 2383 flow [2024-05-12 12:49:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:49:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:49:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-05-12 12:49:35,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2024-05-12 12:49:35,869 INFO L175 Difference]: Start difference. First operand has 147 places, 192 transitions, 1877 flow. Second operand 5 states and 163 transitions. [2024-05-12 12:49:35,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 217 transitions, 2383 flow [2024-05-12 12:49:36,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 217 transitions, 2269 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:36,018 INFO L231 Difference]: Finished difference. Result has 148 places, 195 transitions, 1842 flow [2024-05-12 12:49:36,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1842, PETRI_PLACES=148, PETRI_TRANSITIONS=195} [2024-05-12 12:49:36,018 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 95 predicate places. [2024-05-12 12:49:36,018 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 195 transitions, 1842 flow [2024-05-12 12:49:36,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 12:49:36,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:36,019 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 12:49:36,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 12:49:36,019 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:36,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:36,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1379044056, now seen corresponding path program 2 times [2024-05-12 12:49:36,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:36,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711374543] [2024-05-12 12:49:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:36,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:36,146 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 12:49:36,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:36,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711374543] [2024-05-12 12:49:36,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711374543] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:36,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:36,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189158651] [2024-05-12 12:49:36,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:36,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:36,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:36,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:49:36,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 195 transitions, 1842 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 12:49:36,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:36,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:49:36,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:36,604 INFO L124 PetriNetUnfolderBase]: 2147/3836 cut-off events. [2024-05-12 12:49:36,605 INFO L125 PetriNetUnfolderBase]: For 81526/81532 co-relation queries the response was YES. [2024-05-12 12:49:36,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20019 conditions, 3836 events. 2147/3836 cut-off events. For 81526/81532 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26060 event pairs, 714 based on Foata normal form. 8/3816 useless extension candidates. Maximal degree in co-relation 19952. Up to 2912 conditions per place. [2024-05-12 12:49:36,634 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 156 selfloop transitions, 24 changer transitions 0/213 dead transitions. [2024-05-12 12:49:36,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 213 transitions, 2242 flow [2024-05-12 12:49:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-05-12 12:49:36,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 12:49:36,646 INFO L175 Difference]: Start difference. First operand has 148 places, 195 transitions, 1842 flow. Second operand 6 states and 182 transitions. [2024-05-12 12:49:36,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 213 transitions, 2242 flow [2024-05-12 12:49:36,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 213 transitions, 2178 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:36,738 INFO L231 Difference]: Finished difference. Result has 151 places, 195 transitions, 1832 flow [2024-05-12 12:49:36,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1832, PETRI_PLACES=151, PETRI_TRANSITIONS=195} [2024-05-12 12:49:36,740 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 98 predicate places. [2024-05-12 12:49:36,740 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 195 transitions, 1832 flow [2024-05-12 12:49:36,740 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 12:49:36,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:36,740 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 12:49:36,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 12:49:36,740 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:36,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1283413612, now seen corresponding path program 1 times [2024-05-12 12:49:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:36,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293423286] [2024-05-12 12:49:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:36,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:36,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:36,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293423286] [2024-05-12 12:49:36,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293423286] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:36,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:36,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:36,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560717592] [2024-05-12 12:49:36,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:36,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:36,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:36,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 195 transitions, 1832 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 12:49:36,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:36,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:36,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:37,342 INFO L124 PetriNetUnfolderBase]: 2296/3889 cut-off events. [2024-05-12 12:49:37,342 INFO L125 PetriNetUnfolderBase]: For 83410/83410 co-relation queries the response was YES. [2024-05-12 12:49:37,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20838 conditions, 3889 events. 2296/3889 cut-off events. For 83410/83410 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24993 event pairs, 383 based on Foata normal form. 2/3889 useless extension candidates. Maximal degree in co-relation 20771. Up to 3284 conditions per place. [2024-05-12 12:49:37,375 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 192 selfloop transitions, 18 changer transitions 0/225 dead transitions. [2024-05-12 12:49:37,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 225 transitions, 2322 flow [2024-05-12 12:49:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:49:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:49:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 12:49:37,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064139941690962 [2024-05-12 12:49:37,376 INFO L175 Difference]: Start difference. First operand has 151 places, 195 transitions, 1832 flow. Second operand 7 states and 208 transitions. [2024-05-12 12:49:37,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 225 transitions, 2322 flow [2024-05-12 12:49:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 225 transitions, 2249 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:37,525 INFO L231 Difference]: Finished difference. Result has 153 places, 195 transitions, 1803 flow [2024-05-12 12:49:37,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1803, PETRI_PLACES=153, PETRI_TRANSITIONS=195} [2024-05-12 12:49:37,526 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 100 predicate places. [2024-05-12 12:49:37,526 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 195 transitions, 1803 flow [2024-05-12 12:49:37,526 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 12:49:37,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:37,526 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 12:49:37,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 12:49:37,526 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:37,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash 604736182, now seen corresponding path program 2 times [2024-05-12 12:49:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:37,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199008383] [2024-05-12 12:49:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:37,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:37,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199008383] [2024-05-12 12:49:37,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199008383] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:37,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:37,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:37,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479164355] [2024-05-12 12:49:37,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:37,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:37,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:37,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:37,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:37,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 195 transitions, 1803 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 12:49:37,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:37,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:37,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:38,090 INFO L124 PetriNetUnfolderBase]: 2332/3955 cut-off events. [2024-05-12 12:49:38,091 INFO L125 PetriNetUnfolderBase]: For 88093/88093 co-relation queries the response was YES. [2024-05-12 12:49:38,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21242 conditions, 3955 events. 2332/3955 cut-off events. For 88093/88093 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 25534 event pairs, 397 based on Foata normal form. 2/3952 useless extension candidates. Maximal degree in co-relation 21174. Up to 3122 conditions per place. [2024-05-12 12:49:38,123 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 158 selfloop transitions, 52 changer transitions 0/225 dead transitions. [2024-05-12 12:49:38,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 225 transitions, 2512 flow [2024-05-12 12:49:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 12:49:38,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-05-12 12:49:38,124 INFO L175 Difference]: Start difference. First operand has 153 places, 195 transitions, 1803 flow. Second operand 6 states and 185 transitions. [2024-05-12 12:49:38,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 225 transitions, 2512 flow [2024-05-12 12:49:38,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 225 transitions, 2476 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:38,273 INFO L231 Difference]: Finished difference. Result has 153 places, 202 transitions, 1981 flow [2024-05-12 12:49:38,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1981, PETRI_PLACES=153, PETRI_TRANSITIONS=202} [2024-05-12 12:49:38,274 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 100 predicate places. [2024-05-12 12:49:38,274 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 202 transitions, 1981 flow [2024-05-12 12:49:38,274 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 12:49:38,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:38,275 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 12:49:38,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 12:49:38,275 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:38,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1278645068, now seen corresponding path program 1 times [2024-05-12 12:49:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:38,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677626145] [2024-05-12 12:49:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:38,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:38,403 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 12:49:38,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:38,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677626145] [2024-05-12 12:49:38,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677626145] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:38,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:38,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:38,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370735900] [2024-05-12 12:49:38,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:38,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:38,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:38,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:38,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:38,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:38,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 202 transitions, 1981 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 12:49:38,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:38,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:38,840 INFO L124 PetriNetUnfolderBase]: 2354/4102 cut-off events. [2024-05-12 12:49:38,841 INFO L125 PetriNetUnfolderBase]: For 93438/93438 co-relation queries the response was YES. [2024-05-12 12:49:38,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21896 conditions, 4102 events. 2354/4102 cut-off events. For 93438/93438 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27180 event pairs, 489 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 21827. Up to 3203 conditions per place. [2024-05-12 12:49:38,875 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 190 selfloop transitions, 34 changer transitions 0/239 dead transitions. [2024-05-12 12:49:38,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 239 transitions, 2693 flow [2024-05-12 12:49:38,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-05-12 12:49:38,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-05-12 12:49:38,877 INFO L175 Difference]: Start difference. First operand has 153 places, 202 transitions, 1981 flow. Second operand 6 states and 184 transitions. [2024-05-12 12:49:38,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 239 transitions, 2693 flow [2024-05-12 12:49:39,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 239 transitions, 2621 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-05-12 12:49:39,027 INFO L231 Difference]: Finished difference. Result has 158 places, 216 transitions, 2143 flow [2024-05-12 12:49:39,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2143, PETRI_PLACES=158, PETRI_TRANSITIONS=216} [2024-05-12 12:49:39,028 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-05-12 12:49:39,028 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 216 transitions, 2143 flow [2024-05-12 12:49:39,028 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 12:49:39,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:39,028 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 12:49:39,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 12:49:39,029 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:39,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1070179896, now seen corresponding path program 3 times [2024-05-12 12:49:39,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:39,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010977696] [2024-05-12 12:49:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:39,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:39,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:39,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010977696] [2024-05-12 12:49:39,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010977696] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:39,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:39,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104727337] [2024-05-12 12:49:39,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:39,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:39,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:39,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:39,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 216 transitions, 2143 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 12:49:39,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:39,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:39,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:39,601 INFO L124 PetriNetUnfolderBase]: 2348/4035 cut-off events. [2024-05-12 12:49:39,601 INFO L125 PetriNetUnfolderBase]: For 98152/98152 co-relation queries the response was YES. [2024-05-12 12:49:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22179 conditions, 4035 events. 2348/4035 cut-off events. For 98152/98152 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26537 event pairs, 464 based on Foata normal form. 2/4019 useless extension candidates. Maximal degree in co-relation 22108. Up to 3147 conditions per place. [2024-05-12 12:49:39,634 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 166 selfloop transitions, 55 changer transitions 0/236 dead transitions. [2024-05-12 12:49:39,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 236 transitions, 2773 flow [2024-05-12 12:49:39,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 12:49:39,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-05-12 12:49:39,636 INFO L175 Difference]: Start difference. First operand has 158 places, 216 transitions, 2143 flow. Second operand 6 states and 183 transitions. [2024-05-12 12:49:39,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 236 transitions, 2773 flow [2024-05-12 12:49:39,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 236 transitions, 2714 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-05-12 12:49:39,793 INFO L231 Difference]: Finished difference. Result has 163 places, 216 transitions, 2201 flow [2024-05-12 12:49:39,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2201, PETRI_PLACES=163, PETRI_TRANSITIONS=216} [2024-05-12 12:49:39,793 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 110 predicate places. [2024-05-12 12:49:39,793 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 216 transitions, 2201 flow [2024-05-12 12:49:39,794 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 12:49:39,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:39,794 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 12:49:39,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 12:49:39,794 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:39,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:39,795 INFO L85 PathProgramCache]: Analyzing trace with hash 832644276, now seen corresponding path program 2 times [2024-05-12 12:49:39,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:39,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223987297] [2024-05-12 12:49:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:39,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:39,901 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 12:49:39,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:39,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223987297] [2024-05-12 12:49:39,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223987297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:39,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:39,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:39,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752122973] [2024-05-12 12:49:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:39,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:39,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:39,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:39,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:39,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:39,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 216 transitions, 2201 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 12:49:39,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:39,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:39,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:40,361 INFO L124 PetriNetUnfolderBase]: 2384/4057 cut-off events. [2024-05-12 12:49:40,361 INFO L125 PetriNetUnfolderBase]: For 102730/102730 co-relation queries the response was YES. [2024-05-12 12:49:40,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22765 conditions, 4057 events. 2384/4057 cut-off events. For 102730/102730 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26493 event pairs, 424 based on Foata normal form. 2/4046 useless extension candidates. Maximal degree in co-relation 22691. Up to 3230 conditions per place. [2024-05-12 12:49:40,397 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 186 selfloop transitions, 44 changer transitions 0/245 dead transitions. [2024-05-12 12:49:40,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 245 transitions, 2972 flow [2024-05-12 12:49:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-05-12 12:49:40,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-05-12 12:49:40,399 INFO L175 Difference]: Start difference. First operand has 163 places, 216 transitions, 2201 flow. Second operand 6 states and 184 transitions. [2024-05-12 12:49:40,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 245 transitions, 2972 flow [2024-05-12 12:49:40,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 245 transitions, 2734 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:40,591 INFO L231 Difference]: Finished difference. Result has 162 places, 225 transitions, 2179 flow [2024-05-12 12:49:40,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2179, PETRI_PLACES=162, PETRI_TRANSITIONS=225} [2024-05-12 12:49:40,591 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 109 predicate places. [2024-05-12 12:49:40,591 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 225 transitions, 2179 flow [2024-05-12 12:49:40,592 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 12:49:40,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:40,592 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 12:49:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 12:49:40,592 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:40,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -216865784, now seen corresponding path program 3 times [2024-05-12 12:49:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286267682] [2024-05-12 12:49:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:40,708 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 12:49:40,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:40,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286267682] [2024-05-12 12:49:40,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286267682] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:40,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:40,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:40,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101189568] [2024-05-12 12:49:40,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:40,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:40,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:40,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:40,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:40,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:40,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 225 transitions, 2179 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 12:49:40,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:40,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:40,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:41,221 INFO L124 PetriNetUnfolderBase]: 2378/4076 cut-off events. [2024-05-12 12:49:41,221 INFO L125 PetriNetUnfolderBase]: For 103125/103125 co-relation queries the response was YES. [2024-05-12 12:49:41,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22633 conditions, 4076 events. 2378/4076 cut-off events. For 103125/103125 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26782 event pairs, 427 based on Foata normal form. 2/4067 useless extension candidates. Maximal degree in co-relation 22559. Up to 3225 conditions per place. [2024-05-12 12:49:41,260 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 184 selfloop transitions, 45 changer transitions 0/244 dead transitions. [2024-05-12 12:49:41,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 244 transitions, 2755 flow [2024-05-12 12:49:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-05-12 12:49:41,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-05-12 12:49:41,261 INFO L175 Difference]: Start difference. First operand has 162 places, 225 transitions, 2179 flow. Second operand 6 states and 182 transitions. [2024-05-12 12:49:41,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 244 transitions, 2755 flow [2024-05-12 12:49:41,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 244 transitions, 2685 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-05-12 12:49:41,482 INFO L231 Difference]: Finished difference. Result has 168 places, 225 transitions, 2206 flow [2024-05-12 12:49:41,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2206, PETRI_PLACES=168, PETRI_TRANSITIONS=225} [2024-05-12 12:49:41,483 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-05-12 12:49:41,483 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 225 transitions, 2206 flow [2024-05-12 12:49:41,483 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 12:49:41,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:41,483 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 12:49:41,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 12:49:41,484 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:41,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 841226068, now seen corresponding path program 1 times [2024-05-12 12:49:41,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:41,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331530381] [2024-05-12 12:49:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:41,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:41,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:41,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331530381] [2024-05-12 12:49:41,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331530381] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:41,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:41,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:49:41,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190233185] [2024-05-12 12:49:41,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:41,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:49:41,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:41,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:49:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:49:41,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:49:41,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 225 transitions, 2206 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 12:49:41,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:41,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:49:41,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:42,087 INFO L124 PetriNetUnfolderBase]: 2334/4005 cut-off events. [2024-05-12 12:49:42,087 INFO L125 PetriNetUnfolderBase]: For 112567/112567 co-relation queries the response was YES. [2024-05-12 12:49:42,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22351 conditions, 4005 events. 2334/4005 cut-off events. For 112567/112567 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26502 event pairs, 407 based on Foata normal form. 12/4006 useless extension candidates. Maximal degree in co-relation 22274. Up to 3004 conditions per place. [2024-05-12 12:49:42,125 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 176 selfloop transitions, 32 changer transitions 0/249 dead transitions. [2024-05-12 12:49:42,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 249 transitions, 2718 flow [2024-05-12 12:49:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:49:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:49:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 12:49:42,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-05-12 12:49:42,127 INFO L175 Difference]: Start difference. First operand has 168 places, 225 transitions, 2206 flow. Second operand 6 states and 185 transitions. [2024-05-12 12:49:42,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 249 transitions, 2718 flow [2024-05-12 12:49:42,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 249 transitions, 2622 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:42,310 INFO L231 Difference]: Finished difference. Result has 170 places, 227 transitions, 2217 flow [2024-05-12 12:49:42,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2217, PETRI_PLACES=170, PETRI_TRANSITIONS=227} [2024-05-12 12:49:42,311 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 117 predicate places. [2024-05-12 12:49:42,311 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 227 transitions, 2217 flow [2024-05-12 12:49:42,311 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 12:49:42,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:42,312 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 12:49:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 12:49:42,312 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:42,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1912635464, now seen corresponding path program 1 times [2024-05-12 12:49:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:42,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089734027] [2024-05-12 12:49:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:42,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089734027] [2024-05-12 12:49:42,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089734027] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:42,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:42,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:42,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628390156] [2024-05-12 12:49:42,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:42,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:42,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:42,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:42,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:42,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:42,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 227 transitions, 2217 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:42,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:42,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:42,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:43,267 INFO L124 PetriNetUnfolderBase]: 2772/4812 cut-off events. [2024-05-12 12:49:43,268 INFO L125 PetriNetUnfolderBase]: For 154017/154017 co-relation queries the response was YES. [2024-05-12 12:49:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27953 conditions, 4812 events. 2772/4812 cut-off events. For 154017/154017 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32648 event pairs, 648 based on Foata normal form. 18/4780 useless extension candidates. Maximal degree in co-relation 27875. Up to 3373 conditions per place. [2024-05-12 12:49:43,309 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 241 selfloop transitions, 36 changer transitions 0/292 dead transitions. [2024-05-12 12:49:43,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 292 transitions, 3215 flow [2024-05-12 12:49:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:49:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:49:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 289 transitions. [2024-05-12 12:49:43,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655328798185941 [2024-05-12 12:49:43,310 INFO L175 Difference]: Start difference. First operand has 170 places, 227 transitions, 2217 flow. Second operand 9 states and 289 transitions. [2024-05-12 12:49:43,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 292 transitions, 3215 flow [2024-05-12 12:49:43,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 292 transitions, 3132 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:43,538 INFO L231 Difference]: Finished difference. Result has 175 places, 231 transitions, 2357 flow [2024-05-12 12:49:43,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2357, PETRI_PLACES=175, PETRI_TRANSITIONS=231} [2024-05-12 12:49:43,539 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 122 predicate places. [2024-05-12 12:49:43,539 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 231 transitions, 2357 flow [2024-05-12 12:49:43,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:43,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:43,540 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 12:49:43,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 12:49:43,540 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:43,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:43,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1011433736, now seen corresponding path program 2 times [2024-05-12 12:49:43,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:43,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395654394] [2024-05-12 12:49:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:43,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:43,677 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 12:49:43,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:43,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395654394] [2024-05-12 12:49:43,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395654394] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:43,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:43,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70061887] [2024-05-12 12:49:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:43,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:43,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:43,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:43,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 231 transitions, 2357 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:43,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:43,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:43,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:44,375 INFO L124 PetriNetUnfolderBase]: 2885/5051 cut-off events. [2024-05-12 12:49:44,377 INFO L125 PetriNetUnfolderBase]: For 167524/167524 co-relation queries the response was YES. [2024-05-12 12:49:44,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29624 conditions, 5051 events. 2885/5051 cut-off events. For 167524/167524 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 34725 event pairs, 841 based on Foata normal form. 18/5023 useless extension candidates. Maximal degree in co-relation 29545. Up to 3677 conditions per place. [2024-05-12 12:49:44,425 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 241 selfloop transitions, 31 changer transitions 0/287 dead transitions. [2024-05-12 12:49:44,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 287 transitions, 3267 flow [2024-05-12 12:49:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 259 transitions. [2024-05-12 12:49:44,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-05-12 12:49:44,426 INFO L175 Difference]: Start difference. First operand has 175 places, 231 transitions, 2357 flow. Second operand 8 states and 259 transitions. [2024-05-12 12:49:44,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 287 transitions, 3267 flow [2024-05-12 12:49:44,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 287 transitions, 3169 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-05-12 12:49:44,739 INFO L231 Difference]: Finished difference. Result has 178 places, 233 transitions, 2402 flow [2024-05-12 12:49:44,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2402, PETRI_PLACES=178, PETRI_TRANSITIONS=233} [2024-05-12 12:49:44,739 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 125 predicate places. [2024-05-12 12:49:44,739 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 233 transitions, 2402 flow [2024-05-12 12:49:44,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:44,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:44,740 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 12:49:44,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 12:49:44,740 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:44,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1011553706, now seen corresponding path program 3 times [2024-05-12 12:49:44,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:44,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275299660] [2024-05-12 12:49:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275299660] [2024-05-12 12:49:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275299660] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:44,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:44,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:44,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106559159] [2024-05-12 12:49:44,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:44,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:44,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:44,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:44,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:44,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:44,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 233 transitions, 2402 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:44,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:44,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:44,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:45,547 INFO L124 PetriNetUnfolderBase]: 2839/4893 cut-off events. [2024-05-12 12:49:45,547 INFO L125 PetriNetUnfolderBase]: For 154717/154717 co-relation queries the response was YES. [2024-05-12 12:49:45,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27790 conditions, 4893 events. 2839/4893 cut-off events. For 154717/154717 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33077 event pairs, 590 based on Foata normal form. 24/4909 useless extension candidates. Maximal degree in co-relation 27709. Up to 3854 conditions per place. [2024-05-12 12:49:45,591 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 240 selfloop transitions, 27 changer transitions 0/282 dead transitions. [2024-05-12 12:49:45,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 282 transitions, 3072 flow [2024-05-12 12:49:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 254 transitions. [2024-05-12 12:49:45,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-05-12 12:49:45,593 INFO L175 Difference]: Start difference. First operand has 178 places, 233 transitions, 2402 flow. Second operand 8 states and 254 transitions. [2024-05-12 12:49:45,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 282 transitions, 3072 flow [2024-05-12 12:49:45,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 282 transitions, 2930 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:45,858 INFO L231 Difference]: Finished difference. Result has 180 places, 233 transitions, 2322 flow [2024-05-12 12:49:45,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2322, PETRI_PLACES=180, PETRI_TRANSITIONS=233} [2024-05-12 12:49:45,858 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 127 predicate places. [2024-05-12 12:49:45,859 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 233 transitions, 2322 flow [2024-05-12 12:49:45,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:45,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:45,859 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 12:49:45,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 12:49:45,859 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:45,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2004301270, now seen corresponding path program 4 times [2024-05-12 12:49:45,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:45,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464032861] [2024-05-12 12:49:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:45,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:45,985 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 12:49:45,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:45,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464032861] [2024-05-12 12:49:45,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464032861] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:45,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:45,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:45,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870428495] [2024-05-12 12:49:45,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:45,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:45,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:45,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:46,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:46,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 233 transitions, 2322 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:46,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:46,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:46,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:46,634 INFO L124 PetriNetUnfolderBase]: 2997/5083 cut-off events. [2024-05-12 12:49:46,634 INFO L125 PetriNetUnfolderBase]: For 158105/158105 co-relation queries the response was YES. [2024-05-12 12:49:46,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28627 conditions, 5083 events. 2997/5083 cut-off events. For 158105/158105 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 34502 event pairs, 549 based on Foata normal form. 24/5085 useless extension candidates. Maximal degree in co-relation 28545. Up to 3641 conditions per place. [2024-05-12 12:49:46,681 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 173 selfloop transitions, 95 changer transitions 0/283 dead transitions. [2024-05-12 12:49:46,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 283 transitions, 3236 flow [2024-05-12 12:49:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 261 transitions. [2024-05-12 12:49:46,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6658163265306123 [2024-05-12 12:49:46,685 INFO L175 Difference]: Start difference. First operand has 180 places, 233 transitions, 2322 flow. Second operand 8 states and 261 transitions. [2024-05-12 12:49:46,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 283 transitions, 3236 flow [2024-05-12 12:49:46,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 283 transitions, 3174 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:46,954 INFO L231 Difference]: Finished difference. Result has 181 places, 235 transitions, 2536 flow [2024-05-12 12:49:46,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2536, PETRI_PLACES=181, PETRI_TRANSITIONS=235} [2024-05-12 12:49:46,955 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 128 predicate places. [2024-05-12 12:49:46,955 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 235 transitions, 2536 flow [2024-05-12 12:49:46,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:46,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:46,958 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 12:49:46,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 12:49:46,959 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:46,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:46,959 INFO L85 PathProgramCache]: Analyzing trace with hash 402516232, now seen corresponding path program 5 times [2024-05-12 12:49:46,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:46,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408476038] [2024-05-12 12:49:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:46,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:47,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:47,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408476038] [2024-05-12 12:49:47,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408476038] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:47,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:47,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:47,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286648953] [2024-05-12 12:49:47,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:47,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:47,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:47,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:47,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 235 transitions, 2536 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:47,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:47,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:47,851 INFO L124 PetriNetUnfolderBase]: 3314/5575 cut-off events. [2024-05-12 12:49:47,852 INFO L125 PetriNetUnfolderBase]: For 198067/198067 co-relation queries the response was YES. [2024-05-12 12:49:47,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33981 conditions, 5575 events. 3314/5575 cut-off events. For 198067/198067 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 38361 event pairs, 588 based on Foata normal form. 18/5574 useless extension candidates. Maximal degree in co-relation 33898. Up to 3685 conditions per place. [2024-05-12 12:49:47,906 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 176 selfloop transitions, 101 changer transitions 0/292 dead transitions. [2024-05-12 12:49:47,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 292 transitions, 3722 flow [2024-05-12 12:49:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 265 transitions. [2024-05-12 12:49:47,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6760204081632653 [2024-05-12 12:49:47,907 INFO L175 Difference]: Start difference. First operand has 181 places, 235 transitions, 2536 flow. Second operand 8 states and 265 transitions. [2024-05-12 12:49:47,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 292 transitions, 3722 flow [2024-05-12 12:49:48,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 292 transitions, 3490 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:48,276 INFO L231 Difference]: Finished difference. Result has 183 places, 239 transitions, 2673 flow [2024-05-12 12:49:48,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2304, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2673, PETRI_PLACES=183, PETRI_TRANSITIONS=239} [2024-05-12 12:49:48,277 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 130 predicate places. [2024-05-12 12:49:48,277 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 239 transitions, 2673 flow [2024-05-12 12:49:48,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:48,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:48,277 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 12:49:48,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 12:49:48,277 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:48,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2055766994, now seen corresponding path program 6 times [2024-05-12 12:49:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584518279] [2024-05-12 12:49:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:48,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:48,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584518279] [2024-05-12 12:49:48,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584518279] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:48,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:48,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:48,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595518403] [2024-05-12 12:49:48,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:48,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:48,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:48,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:48,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:48,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:48,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 239 transitions, 2673 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:48,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:48,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:48,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:49,084 INFO L124 PetriNetUnfolderBase]: 3268/5530 cut-off events. [2024-05-12 12:49:49,084 INFO L125 PetriNetUnfolderBase]: For 184477/184477 co-relation queries the response was YES. [2024-05-12 12:49:49,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32263 conditions, 5530 events. 3268/5530 cut-off events. For 184477/184477 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38141 event pairs, 604 based on Foata normal form. 24/5532 useless extension candidates. Maximal degree in co-relation 32179. Up to 4066 conditions per place. [2024-05-12 12:49:49,137 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 176 selfloop transitions, 96 changer transitions 0/287 dead transitions. [2024-05-12 12:49:49,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 287 transitions, 3529 flow [2024-05-12 12:49:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 260 transitions. [2024-05-12 12:49:49,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-05-12 12:49:49,139 INFO L175 Difference]: Start difference. First operand has 183 places, 239 transitions, 2673 flow. Second operand 8 states and 260 transitions. [2024-05-12 12:49:49,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 287 transitions, 3529 flow [2024-05-12 12:49:49,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 287 transitions, 3354 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-05-12 12:49:49,613 INFO L231 Difference]: Finished difference. Result has 188 places, 239 transitions, 2698 flow [2024-05-12 12:49:49,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2698, PETRI_PLACES=188, PETRI_TRANSITIONS=239} [2024-05-12 12:49:49,613 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 135 predicate places. [2024-05-12 12:49:49,613 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 239 transitions, 2698 flow [2024-05-12 12:49:49,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:49,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:49,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:49,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 12:49:49,614 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:49,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:49,614 INFO L85 PathProgramCache]: Analyzing trace with hash 989725770, now seen corresponding path program 1 times [2024-05-12 12:49:49,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:49,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94948829] [2024-05-12 12:49:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:49,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:49,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:49,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94948829] [2024-05-12 12:49:49,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94948829] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:49,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:49,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733449569] [2024-05-12 12:49:49,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:49,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:49,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:49,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:49,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:49,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 239 transitions, 2698 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:49,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:49,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:49,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:50,491 INFO L124 PetriNetUnfolderBase]: 3381/5701 cut-off events. [2024-05-12 12:49:50,491 INFO L125 PetriNetUnfolderBase]: For 180103/180103 co-relation queries the response was YES. [2024-05-12 12:49:50,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33067 conditions, 5701 events. 3381/5701 cut-off events. For 180103/180103 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39452 event pairs, 589 based on Foata normal form. 18/5689 useless extension candidates. Maximal degree in co-relation 32980. Up to 3644 conditions per place. [2024-05-12 12:49:50,546 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 173 selfloop transitions, 104 changer transitions 0/292 dead transitions. [2024-05-12 12:49:50,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 292 transitions, 3668 flow [2024-05-12 12:49:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 262 transitions. [2024-05-12 12:49:50,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-05-12 12:49:50,548 INFO L175 Difference]: Start difference. First operand has 188 places, 239 transitions, 2698 flow. Second operand 8 states and 262 transitions. [2024-05-12 12:49:50,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 292 transitions, 3668 flow [2024-05-12 12:49:50,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 292 transitions, 3460 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:50,918 INFO L231 Difference]: Finished difference. Result has 189 places, 241 transitions, 2791 flow [2024-05-12 12:49:50,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2791, PETRI_PLACES=189, PETRI_TRANSITIONS=241} [2024-05-12 12:49:50,919 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-05-12 12:49:50,919 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 241 transitions, 2791 flow [2024-05-12 12:49:50,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:50,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:50,920 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 12:49:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 12:49:50,920 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:50,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:50,920 INFO L85 PathProgramCache]: Analyzing trace with hash 239069674, now seen corresponding path program 7 times [2024-05-12 12:49:50,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:50,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682917837] [2024-05-12 12:49:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:50,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:51,062 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 12:49:51,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:51,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682917837] [2024-05-12 12:49:51,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682917837] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:51,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:51,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:51,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58224809] [2024-05-12 12:49:51,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:51,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:51,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:51,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:51,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:51,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 241 transitions, 2791 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:51,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:51,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:51,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:51,918 INFO L124 PetriNetUnfolderBase]: 3539/5964 cut-off events. [2024-05-12 12:49:51,918 INFO L125 PetriNetUnfolderBase]: For 203264/203264 co-relation queries the response was YES. [2024-05-12 12:49:51,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35446 conditions, 5964 events. 3539/5964 cut-off events. For 203264/203264 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41733 event pairs, 668 based on Foata normal form. 24/5968 useless extension candidates. Maximal degree in co-relation 35358. Up to 4491 conditions per place. [2024-05-12 12:49:51,984 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 186 selfloop transitions, 87 changer transitions 0/288 dead transitions. [2024-05-12 12:49:51,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 288 transitions, 3735 flow [2024-05-12 12:49:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 256 transitions. [2024-05-12 12:49:51,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 12:49:51,985 INFO L175 Difference]: Start difference. First operand has 189 places, 241 transitions, 2791 flow. Second operand 8 states and 256 transitions. [2024-05-12 12:49:51,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 288 transitions, 3735 flow [2024-05-12 12:49:52,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 288 transitions, 3470 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:52,456 INFO L231 Difference]: Finished difference. Result has 191 places, 243 transitions, 2798 flow [2024-05-12 12:49:52,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2798, PETRI_PLACES=191, PETRI_TRANSITIONS=243} [2024-05-12 12:49:52,456 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 138 predicate places. [2024-05-12 12:49:52,457 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 243 transitions, 2798 flow [2024-05-12 12:49:52,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:52,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:52,457 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 12:49:52,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 12:49:52,457 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:52,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash -940926194, now seen corresponding path program 8 times [2024-05-12 12:49:52,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:52,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814614558] [2024-05-12 12:49:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:52,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:52,619 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 12:49:52,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:52,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814614558] [2024-05-12 12:49:52,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814614558] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:52,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:52,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766429443] [2024-05-12 12:49:52,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:52,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:52,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:52,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 243 transitions, 2798 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:52,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:52,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:53,422 INFO L124 PetriNetUnfolderBase]: 3697/6225 cut-off events. [2024-05-12 12:49:53,422 INFO L125 PetriNetUnfolderBase]: For 217569/217569 co-relation queries the response was YES. [2024-05-12 12:49:53,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36918 conditions, 6225 events. 3697/6225 cut-off events. For 217569/217569 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 43958 event pairs, 696 based on Foata normal form. 24/6229 useless extension candidates. Maximal degree in co-relation 36829. Up to 4737 conditions per place. [2024-05-12 12:49:53,485 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 187 selfloop transitions, 89 changer transitions 0/291 dead transitions. [2024-05-12 12:49:53,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 291 transitions, 3854 flow [2024-05-12 12:49:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 256 transitions. [2024-05-12 12:49:53,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 12:49:53,487 INFO L175 Difference]: Start difference. First operand has 191 places, 243 transitions, 2798 flow. Second operand 8 states and 256 transitions. [2024-05-12 12:49:53,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 291 transitions, 3854 flow [2024-05-12 12:49:53,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 291 transitions, 3626 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:53,966 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 2850 flow [2024-05-12 12:49:53,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-05-12 12:49:53,967 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-05-12 12:49:53,967 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 2850 flow [2024-05-12 12:49:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:53,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:53,967 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 12:49:53,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 12:49:53,968 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:53,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -945687794, now seen corresponding path program 9 times [2024-05-12 12:49:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101078625] [2024-05-12 12:49:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:49:54,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:54,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101078625] [2024-05-12 12:49:54,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101078625] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:54,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752463622] [2024-05-12 12:49:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:54,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:54,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:54,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 2850 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:54,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:54,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:54,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:54,949 INFO L124 PetriNetUnfolderBase]: 3979/6675 cut-off events. [2024-05-12 12:49:54,949 INFO L125 PetriNetUnfolderBase]: For 252843/252843 co-relation queries the response was YES. [2024-05-12 12:49:54,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41078 conditions, 6675 events. 3979/6675 cut-off events. For 252843/252843 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 47432 event pairs, 733 based on Foata normal form. 18/6673 useless extension candidates. Maximal degree in co-relation 40988. Up to 4514 conditions per place. [2024-05-12 12:49:55,019 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 188 selfloop transitions, 97 changer transitions 0/300 dead transitions. [2024-05-12 12:49:55,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 300 transitions, 4216 flow [2024-05-12 12:49:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 260 transitions. [2024-05-12 12:49:55,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-05-12 12:49:55,020 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 2850 flow. Second operand 8 states and 260 transitions. [2024-05-12 12:49:55,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 300 transitions, 4216 flow [2024-05-12 12:49:55,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 300 transitions, 3980 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-05-12 12:49:55,609 INFO L231 Difference]: Finished difference. Result has 195 places, 249 transitions, 3007 flow [2024-05-12 12:49:55,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2614, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3007, PETRI_PLACES=195, PETRI_TRANSITIONS=249} [2024-05-12 12:49:55,610 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 142 predicate places. [2024-05-12 12:49:55,610 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 249 transitions, 3007 flow [2024-05-12 12:49:55,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:55,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:55,610 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 12:49:55,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 12:49:55,610 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:55,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 933305102, now seen corresponding path program 10 times [2024-05-12 12:49:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917253520] [2024-05-12 12:49:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:55,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:55,740 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 12:49:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917253520] [2024-05-12 12:49:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917253520] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758204457] [2024-05-12 12:49:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:55,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:55,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:55,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 249 transitions, 3007 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:55,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:55,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:55,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:56,645 INFO L124 PetriNetUnfolderBase]: 4015/6830 cut-off events. [2024-05-12 12:49:56,646 INFO L125 PetriNetUnfolderBase]: For 248713/248713 co-relation queries the response was YES. [2024-05-12 12:49:56,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40672 conditions, 6830 events. 4015/6830 cut-off events. For 248713/248713 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 49169 event pairs, 1375 based on Foata normal form. 24/6814 useless extension candidates. Maximal degree in co-relation 40581. Up to 5715 conditions per place. [2024-05-12 12:49:56,716 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 256 selfloop transitions, 26 changer transitions 0/297 dead transitions. [2024-05-12 12:49:56,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 297 transitions, 3845 flow [2024-05-12 12:49:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:49:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:49:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-05-12 12:49:56,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145124716553289 [2024-05-12 12:49:56,717 INFO L175 Difference]: Start difference. First operand has 195 places, 249 transitions, 3007 flow. Second operand 9 states and 271 transitions. [2024-05-12 12:49:56,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 297 transitions, 3845 flow [2024-05-12 12:49:57,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 297 transitions, 3632 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-05-12 12:49:57,300 INFO L231 Difference]: Finished difference. Result has 200 places, 250 transitions, 2902 flow [2024-05-12 12:49:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2902, PETRI_PLACES=200, PETRI_TRANSITIONS=250} [2024-05-12 12:49:57,301 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 147 predicate places. [2024-05-12 12:49:57,301 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 250 transitions, 2902 flow [2024-05-12 12:49:57,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:57,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:57,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 12:49:57,302 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:57,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1178940974, now seen corresponding path program 2 times [2024-05-12 12:49:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651475803] [2024-05-12 12:49:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:57,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:57,425 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 12:49:57,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:57,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651475803] [2024-05-12 12:49:57,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651475803] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:57,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:57,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:57,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580907422] [2024-05-12 12:49:57,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:57,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:57,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:57,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:57,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:57,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 250 transitions, 2902 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:57,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:57,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:57,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:49:58,323 INFO L124 PetriNetUnfolderBase]: 4128/6893 cut-off events. [2024-05-12 12:49:58,323 INFO L125 PetriNetUnfolderBase]: For 240280/240280 co-relation queries the response was YES. [2024-05-12 12:49:58,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41082 conditions, 6893 events. 4128/6893 cut-off events. For 240280/240280 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 49203 event pairs, 713 based on Foata normal form. 18/6904 useless extension candidates. Maximal degree in co-relation 40989. Up to 5013 conditions per place. [2024-05-12 12:49:58,395 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 192 selfloop transitions, 93 changer transitions 0/300 dead transitions. [2024-05-12 12:49:58,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 300 transitions, 3916 flow [2024-05-12 12:49:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:49:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:49:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 258 transitions. [2024-05-12 12:49:58,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6581632653061225 [2024-05-12 12:49:58,397 INFO L175 Difference]: Start difference. First operand has 200 places, 250 transitions, 2902 flow. Second operand 8 states and 258 transitions. [2024-05-12 12:49:58,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 300 transitions, 3916 flow [2024-05-12 12:49:58,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 300 transitions, 3820 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-05-12 12:49:58,995 INFO L231 Difference]: Finished difference. Result has 201 places, 252 transitions, 3101 flow [2024-05-12 12:49:58,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3101, PETRI_PLACES=201, PETRI_TRANSITIONS=252} [2024-05-12 12:49:58,996 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 148 predicate places. [2024-05-12 12:49:58,996 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 252 transitions, 3101 flow [2024-05-12 12:49:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:58,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:49:58,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:49:58,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 12:49:58,996 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:49:58,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:49:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash 941882926, now seen corresponding path program 3 times [2024-05-12 12:49:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:49:58,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65619160] [2024-05-12 12:49:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:49:58,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:49:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:49:59,125 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 12:49:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:49:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65619160] [2024-05-12 12:49:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65619160] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:49:59,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:49:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:49:59,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519536599] [2024-05-12 12:49:59,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:49:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:49:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:49:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:49:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:49:59,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:49:59,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 252 transitions, 3101 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:49:59,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:49:59,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:49:59,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:00,073 INFO L124 PetriNetUnfolderBase]: 4241/7238 cut-off events. [2024-05-12 12:50:00,074 INFO L125 PetriNetUnfolderBase]: For 255941/255941 co-relation queries the response was YES. [2024-05-12 12:50:00,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43015 conditions, 7238 events. 4241/7238 cut-off events. For 255941/255941 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 52900 event pairs, 1422 based on Foata normal form. 18/7218 useless extension candidates. Maximal degree in co-relation 42921. Up to 5880 conditions per place. [2024-05-12 12:50:00,261 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 259 selfloop transitions, 30 changer transitions 0/304 dead transitions. [2024-05-12 12:50:00,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 304 transitions, 4031 flow [2024-05-12 12:50:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:50:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:50:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 274 transitions. [2024-05-12 12:50:00,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6213151927437641 [2024-05-12 12:50:00,263 INFO L175 Difference]: Start difference. First operand has 201 places, 252 transitions, 3101 flow. Second operand 9 states and 274 transitions. [2024-05-12 12:50:00,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 304 transitions, 4031 flow [2024-05-12 12:50:00,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 304 transitions, 3772 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:00,768 INFO L231 Difference]: Finished difference. Result has 204 places, 254 transitions, 3015 flow [2024-05-12 12:50:00,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2842, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3015, PETRI_PLACES=204, PETRI_TRANSITIONS=254} [2024-05-12 12:50:00,768 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 151 predicate places. [2024-05-12 12:50:00,768 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 254 transitions, 3015 flow [2024-05-12 12:50:00,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:50:00,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:00,769 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 12:50:00,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 12:50:00,769 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:00,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:00,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1876044242, now seen corresponding path program 4 times [2024-05-12 12:50:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494713196] [2024-05-12 12:50:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494713196] [2024-05-12 12:50:00,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494713196] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:00,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:00,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:50:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269334668] [2024-05-12 12:50:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:00,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:50:00,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:00,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:50:00,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:50:00,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:00,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 254 transitions, 3015 flow. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:50:00,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:00,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:00,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:01,913 INFO L124 PetriNetUnfolderBase]: 4356/7413 cut-off events. [2024-05-12 12:50:01,913 INFO L125 PetriNetUnfolderBase]: For 261072/261072 co-relation queries the response was YES. [2024-05-12 12:50:01,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43781 conditions, 7413 events. 4356/7413 cut-off events. For 261072/261072 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54147 event pairs, 1403 based on Foata normal form. 18/7392 useless extension candidates. Maximal degree in co-relation 43686. Up to 5571 conditions per place. [2024-05-12 12:50:01,992 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 263 selfloop transitions, 32 changer transitions 0/310 dead transitions. [2024-05-12 12:50:01,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 310 transitions, 3993 flow [2024-05-12 12:50:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:50:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:50:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-05-12 12:50:01,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-05-12 12:50:01,993 INFO L175 Difference]: Start difference. First operand has 204 places, 254 transitions, 3015 flow. Second operand 9 states and 278 transitions. [2024-05-12 12:50:01,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 310 transitions, 3993 flow [2024-05-12 12:50:02,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 310 transitions, 3856 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:02,427 INFO L231 Difference]: Finished difference. Result has 205 places, 255 transitions, 2967 flow [2024-05-12 12:50:02,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2967, PETRI_PLACES=205, PETRI_TRANSITIONS=255} [2024-05-12 12:50:02,427 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 152 predicate places. [2024-05-12 12:50:02,427 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 255 transitions, 2967 flow [2024-05-12 12:50:02,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 12:50:02,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:02,428 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 12:50:02,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 12:50:02,428 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:02,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1758553910, now seen corresponding path program 1 times [2024-05-12 12:50:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762467234] [2024-05-12 12:50:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:02,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:02,527 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 12:50:02,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:02,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762467234] [2024-05-12 12:50:02,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762467234] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:02,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:02,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:50:02,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950978885] [2024-05-12 12:50:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:02,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:50:02,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:02,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:50:02,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:50:02,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 49 [2024-05-12 12:50:02,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 255 transitions, 2967 flow. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:02,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:02,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 49 [2024-05-12 12:50:02,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:03,278 INFO L124 PetriNetUnfolderBase]: 2916/6590 cut-off events. [2024-05-12 12:50:03,279 INFO L125 PetriNetUnfolderBase]: For 106900/107039 co-relation queries the response was YES. [2024-05-12 12:50:03,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26143 conditions, 6590 events. 2916/6590 cut-off events. For 106900/107039 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 60880 event pairs, 423 based on Foata normal form. 305/6526 useless extension candidates. Maximal degree in co-relation 26047. Up to 2461 conditions per place. [2024-05-12 12:50:03,345 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 32 selfloop transitions, 51 changer transitions 0/272 dead transitions. [2024-05-12 12:50:03,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 272 transitions, 3219 flow [2024-05-12 12:50:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:50:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:50:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-05-12 12:50:03,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-05-12 12:50:03,346 INFO L175 Difference]: Start difference. First operand has 205 places, 255 transitions, 2967 flow. Second operand 4 states and 147 transitions. [2024-05-12 12:50:03,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 272 transitions, 3219 flow [2024-05-12 12:50:03,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 272 transitions, 3098 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:03,605 INFO L231 Difference]: Finished difference. Result has 205 places, 259 transitions, 3092 flow [2024-05-12 12:50:03,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3092, PETRI_PLACES=205, PETRI_TRANSITIONS=259} [2024-05-12 12:50:03,605 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 152 predicate places. [2024-05-12 12:50:03,606 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 259 transitions, 3092 flow [2024-05-12 12:50:03,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:03,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:03,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:03,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 12:50:03,606 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:03,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1918037203, now seen corresponding path program 1 times [2024-05-12 12:50:03,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:03,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040334628] [2024-05-12 12:50:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:03,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:03,722 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 12:50:03,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:03,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040334628] [2024-05-12 12:50:03,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040334628] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:03,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:03,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:03,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843101205] [2024-05-12 12:50:03,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:03,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:03,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:03,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:03,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 259 transitions, 3092 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:03,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:03,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:03,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:04,710 INFO L124 PetriNetUnfolderBase]: 4447/7800 cut-off events. [2024-05-12 12:50:04,710 INFO L125 PetriNetUnfolderBase]: For 242951/242997 co-relation queries the response was YES. [2024-05-12 12:50:04,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46259 conditions, 7800 events. 4447/7800 cut-off events. For 242951/242997 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 58983 event pairs, 1529 based on Foata normal form. 5/7543 useless extension candidates. Maximal degree in co-relation 46160. Up to 6723 conditions per place. [2024-05-12 12:50:04,796 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 223 selfloop transitions, 39 changer transitions 0/278 dead transitions. [2024-05-12 12:50:04,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 278 transitions, 3842 flow [2024-05-12 12:50:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 12:50:04,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2024-05-12 12:50:04,798 INFO L175 Difference]: Start difference. First operand has 205 places, 259 transitions, 3092 flow. Second operand 5 states and 152 transitions. [2024-05-12 12:50:04,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 278 transitions, 3842 flow [2024-05-12 12:50:05,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 278 transitions, 3840 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:50:05,448 INFO L231 Difference]: Finished difference. Result has 209 places, 265 transitions, 3273 flow [2024-05-12 12:50:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3273, PETRI_PLACES=209, PETRI_TRANSITIONS=265} [2024-05-12 12:50:05,448 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 156 predicate places. [2024-05-12 12:50:05,449 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 265 transitions, 3273 flow [2024-05-12 12:50:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:05,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 12:50:05,449 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:05,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash 583548577, now seen corresponding path program 2 times [2024-05-12 12:50:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440305350] [2024-05-12 12:50:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:05,569 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 12:50:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:05,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440305350] [2024-05-12 12:50:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440305350] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:05,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:05,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191372798] [2024-05-12 12:50:05,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:05,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:05,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:05,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:05,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 265 transitions, 3273 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:05,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:05,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:05,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:06,686 INFO L124 PetriNetUnfolderBase]: 4444/7795 cut-off events. [2024-05-12 12:50:06,686 INFO L125 PetriNetUnfolderBase]: For 247791/247844 co-relation queries the response was YES. [2024-05-12 12:50:06,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46415 conditions, 7795 events. 4444/7795 cut-off events. For 247791/247844 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 59002 event pairs, 1526 based on Foata normal form. 12/7549 useless extension candidates. Maximal degree in co-relation 46314. Up to 6720 conditions per place. [2024-05-12 12:50:06,770 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 219 selfloop transitions, 44 changer transitions 0/279 dead transitions. [2024-05-12 12:50:06,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 279 transitions, 3833 flow [2024-05-12 12:50:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:50:06,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860058309037901 [2024-05-12 12:50:06,772 INFO L175 Difference]: Start difference. First operand has 209 places, 265 transitions, 3273 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:50:06,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 279 transitions, 3833 flow [2024-05-12 12:50:07,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 279 transitions, 3802 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:07,484 INFO L231 Difference]: Finished difference. Result has 214 places, 265 transitions, 3341 flow [2024-05-12 12:50:07,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3341, PETRI_PLACES=214, PETRI_TRANSITIONS=265} [2024-05-12 12:50:07,488 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 161 predicate places. [2024-05-12 12:50:07,488 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 265 transitions, 3341 flow [2024-05-12 12:50:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:07,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:07,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 12:50:07,489 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:07,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:07,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1122320083, now seen corresponding path program 1 times [2024-05-12 12:50:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:07,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528707752] [2024-05-12 12:50:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:07,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:07,662 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 12:50:07,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528707752] [2024-05-12 12:50:07,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528707752] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:07,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:07,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721269293] [2024-05-12 12:50:07,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:07,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:07,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:07,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:07,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:07,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 265 transitions, 3341 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:07,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:07,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:07,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:08,644 INFO L124 PetriNetUnfolderBase]: 4465/7924 cut-off events. [2024-05-12 12:50:08,644 INFO L125 PetriNetUnfolderBase]: For 253067/253113 co-relation queries the response was YES. [2024-05-12 12:50:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47037 conditions, 7924 events. 4465/7924 cut-off events. For 253067/253113 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 60325 event pairs, 1342 based on Foata normal form. 6/7666 useless extension candidates. Maximal degree in co-relation 46935. Up to 6728 conditions per place. [2024-05-12 12:50:08,731 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 253 selfloop transitions, 19 changer transitions 0/288 dead transitions. [2024-05-12 12:50:08,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 288 transitions, 4175 flow [2024-05-12 12:50:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 12:50:08,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2024-05-12 12:50:08,732 INFO L175 Difference]: Start difference. First operand has 214 places, 265 transitions, 3341 flow. Second operand 5 states and 152 transitions. [2024-05-12 12:50:08,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 288 transitions, 4175 flow [2024-05-12 12:50:09,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 288 transitions, 4055 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:09,479 INFO L231 Difference]: Finished difference. Result has 212 places, 269 transitions, 3398 flow [2024-05-12 12:50:09,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3398, PETRI_PLACES=212, PETRI_TRANSITIONS=269} [2024-05-12 12:50:09,480 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 159 predicate places. [2024-05-12 12:50:09,480 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 269 transitions, 3398 flow [2024-05-12 12:50:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:09,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:09,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:09,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 12:50:09,481 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:09,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:09,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1072838503, now seen corresponding path program 2 times [2024-05-12 12:50:09,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:09,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725828646] [2024-05-12 12:50:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:09,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:09,636 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 12:50:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:09,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725828646] [2024-05-12 12:50:09,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725828646] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:09,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:09,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:09,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169706895] [2024-05-12 12:50:09,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:09,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:09,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:09,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 269 transitions, 3398 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:09,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:09,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:09,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:10,635 INFO L124 PetriNetUnfolderBase]: 4460/7824 cut-off events. [2024-05-12 12:50:10,635 INFO L125 PetriNetUnfolderBase]: For 251718/251768 co-relation queries the response was YES. [2024-05-12 12:50:10,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46860 conditions, 7824 events. 4460/7824 cut-off events. For 251718/251768 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59220 event pairs, 1525 based on Foata normal form. 10/7574 useless extension candidates. Maximal degree in co-relation 46758. Up to 6797 conditions per place. [2024-05-12 12:50:10,720 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 247 selfloop transitions, 18 changer transitions 0/281 dead transitions. [2024-05-12 12:50:10,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 281 transitions, 3960 flow [2024-05-12 12:50:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:50:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:50:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-05-12 12:50:10,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 12:50:10,721 INFO L175 Difference]: Start difference. First operand has 212 places, 269 transitions, 3398 flow. Second operand 5 states and 147 transitions. [2024-05-12 12:50:10,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 281 transitions, 3960 flow [2024-05-12 12:50:11,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 281 transitions, 3836 flow, removed 56 selfloop flow, removed 1 redundant places. [2024-05-12 12:50:11,344 INFO L231 Difference]: Finished difference. Result has 216 places, 269 transitions, 3315 flow [2024-05-12 12:50:11,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3315, PETRI_PLACES=216, PETRI_TRANSITIONS=269} [2024-05-12 12:50:11,344 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 163 predicate places. [2024-05-12 12:50:11,344 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 269 transitions, 3315 flow [2024-05-12 12:50:11,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:11,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:11,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:11,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 12:50:11,345 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:11,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1435755445, now seen corresponding path program 3 times [2024-05-12 12:50:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:11,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026954727] [2024-05-12 12:50:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:11,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:11,447 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 12:50:11,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:11,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026954727] [2024-05-12 12:50:11,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026954727] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:11,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:11,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:11,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202310432] [2024-05-12 12:50:11,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:11,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:11,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:11,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:11,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:11,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:11,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 269 transitions, 3315 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:11,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:11,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:11,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:12,458 INFO L124 PetriNetUnfolderBase]: 4466/7835 cut-off events. [2024-05-12 12:50:12,459 INFO L125 PetriNetUnfolderBase]: For 251181/251227 co-relation queries the response was YES. [2024-05-12 12:50:12,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46577 conditions, 7835 events. 4466/7835 cut-off events. For 251181/251227 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59398 event pairs, 1528 based on Foata normal form. 5/7575 useless extension candidates. Maximal degree in co-relation 46473. Up to 6717 conditions per place. [2024-05-12 12:50:12,537 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 225 selfloop transitions, 48 changer transitions 0/289 dead transitions. [2024-05-12 12:50:12,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 289 transitions, 4064 flow [2024-05-12 12:50:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 12:50:12,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-05-12 12:50:12,539 INFO L175 Difference]: Start difference. First operand has 216 places, 269 transitions, 3315 flow. Second operand 6 states and 177 transitions. [2024-05-12 12:50:12,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 289 transitions, 4064 flow [2024-05-12 12:50:13,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 289 transitions, 4016 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:13,144 INFO L231 Difference]: Finished difference. Result has 218 places, 272 transitions, 3419 flow [2024-05-12 12:50:13,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3267, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3419, PETRI_PLACES=218, PETRI_TRANSITIONS=272} [2024-05-12 12:50:13,144 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 165 predicate places. [2024-05-12 12:50:13,144 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 272 transitions, 3419 flow [2024-05-12 12:50:13,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:13,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:13,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:13,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 12:50:13,145 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:13,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1447183285, now seen corresponding path program 4 times [2024-05-12 12:50:13,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:13,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997305318] [2024-05-12 12:50:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:13,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:13,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997305318] [2024-05-12 12:50:13,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997305318] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:13,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:13,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:13,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743023075] [2024-05-12 12:50:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:13,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:13,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:13,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:13,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:13,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 272 transitions, 3419 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:13,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:13,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:13,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:14,218 INFO L124 PetriNetUnfolderBase]: 4472/7845 cut-off events. [2024-05-12 12:50:14,218 INFO L125 PetriNetUnfolderBase]: For 257624/257670 co-relation queries the response was YES. [2024-05-12 12:50:14,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46833 conditions, 7845 events. 4472/7845 cut-off events. For 257624/257670 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59450 event pairs, 1528 based on Foata normal form. 5/7584 useless extension candidates. Maximal degree in co-relation 46728. Up to 6724 conditions per place. [2024-05-12 12:50:14,301 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 220 selfloop transitions, 53 changer transitions 0/289 dead transitions. [2024-05-12 12:50:14,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 289 transitions, 4168 flow [2024-05-12 12:50:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 12:50:14,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-05-12 12:50:14,302 INFO L175 Difference]: Start difference. First operand has 218 places, 272 transitions, 3419 flow. Second operand 6 states and 175 transitions. [2024-05-12 12:50:14,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 289 transitions, 4168 flow [2024-05-12 12:50:14,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 289 transitions, 4022 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:14,799 INFO L231 Difference]: Finished difference. Result has 220 places, 275 transitions, 3440 flow [2024-05-12 12:50:14,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3286, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3440, PETRI_PLACES=220, PETRI_TRANSITIONS=275} [2024-05-12 12:50:14,800 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 167 predicate places. [2024-05-12 12:50:14,800 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 275 transitions, 3440 flow [2024-05-12 12:50:14,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:14,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:14,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 12:50:14,801 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:14,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1805758343, now seen corresponding path program 5 times [2024-05-12 12:50:14,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:14,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997367772] [2024-05-12 12:50:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:14,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:14,901 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 12:50:14,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997367772] [2024-05-12 12:50:14,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997367772] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:14,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:14,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:14,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464136471] [2024-05-12 12:50:14,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:14,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:14,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:14,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:14,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 275 transitions, 3440 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:14,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:14,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:14,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:15,901 INFO L124 PetriNetUnfolderBase]: 4469/7842 cut-off events. [2024-05-12 12:50:15,901 INFO L125 PetriNetUnfolderBase]: For 262637/262703 co-relation queries the response was YES. [2024-05-12 12:50:15,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46728 conditions, 7842 events. 4469/7842 cut-off events. For 262637/262703 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59464 event pairs, 1554 based on Foata normal form. 20/7603 useless extension candidates. Maximal degree in co-relation 46623. Up to 6721 conditions per place. [2024-05-12 12:50:15,987 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 214 selfloop transitions, 55 changer transitions 0/285 dead transitions. [2024-05-12 12:50:15,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 285 transitions, 4002 flow [2024-05-12 12:50:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 12:50:15,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-05-12 12:50:15,989 INFO L175 Difference]: Start difference. First operand has 220 places, 275 transitions, 3440 flow. Second operand 6 states and 172 transitions. [2024-05-12 12:50:15,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 285 transitions, 4002 flow [2024-05-12 12:50:16,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 285 transitions, 3918 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 12:50:16,575 INFO L231 Difference]: Finished difference. Result has 223 places, 275 transitions, 3472 flow [2024-05-12 12:50:16,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3472, PETRI_PLACES=223, PETRI_TRANSITIONS=275} [2024-05-12 12:50:16,575 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 170 predicate places. [2024-05-12 12:50:16,576 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 275 transitions, 3472 flow [2024-05-12 12:50:16,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:16,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:16,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:16,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 12:50:16,576 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:16,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1092149739, now seen corresponding path program 1 times [2024-05-12 12:50:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:16,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799511889] [2024-05-12 12:50:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:16,707 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 12:50:16,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:16,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799511889] [2024-05-12 12:50:16,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799511889] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:16,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:16,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:16,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484516543] [2024-05-12 12:50:16,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:16,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:16,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:16,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:16,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 275 transitions, 3472 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 12:50:16,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:16,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:16,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:17,777 INFO L124 PetriNetUnfolderBase]: 4475/7859 cut-off events. [2024-05-12 12:50:17,778 INFO L125 PetriNetUnfolderBase]: For 269793/269845 co-relation queries the response was YES. [2024-05-12 12:50:17,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46922 conditions, 7859 events. 4475/7859 cut-off events. For 269793/269845 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59473 event pairs, 1520 based on Foata normal form. 11/7601 useless extension candidates. Maximal degree in co-relation 46816. Up to 6729 conditions per place. [2024-05-12 12:50:17,882 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 229 selfloop transitions, 58 changer transitions 0/303 dead transitions. [2024-05-12 12:50:17,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 303 transitions, 4393 flow [2024-05-12 12:50:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:17,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 12:50:17,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60932944606414 [2024-05-12 12:50:17,883 INFO L175 Difference]: Start difference. First operand has 223 places, 275 transitions, 3472 flow. Second operand 7 states and 209 transitions. [2024-05-12 12:50:17,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 303 transitions, 4393 flow [2024-05-12 12:50:18,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 303 transitions, 4161 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 12:50:18,580 INFO L231 Difference]: Finished difference. Result has 222 places, 278 transitions, 3411 flow [2024-05-12 12:50:18,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3240, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3411, PETRI_PLACES=222, PETRI_TRANSITIONS=278} [2024-05-12 12:50:18,581 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 169 predicate places. [2024-05-12 12:50:18,581 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 278 transitions, 3411 flow [2024-05-12 12:50:18,581 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 12:50:18,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:18,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:18,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 12:50:18,582 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:18,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1864127497, now seen corresponding path program 2 times [2024-05-12 12:50:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:18,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203106230] [2024-05-12 12:50:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:18,705 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 12:50:18,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203106230] [2024-05-12 12:50:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203106230] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:18,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:18,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657009542] [2024-05-12 12:50:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:18,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:18,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 278 transitions, 3411 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 12:50:18,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:18,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:18,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:19,710 INFO L124 PetriNetUnfolderBase]: 4472/7850 cut-off events. [2024-05-12 12:50:19,711 INFO L125 PetriNetUnfolderBase]: For 272502/272544 co-relation queries the response was YES. [2024-05-12 12:50:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46889 conditions, 7850 events. 4472/7850 cut-off events. For 272502/272544 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59480 event pairs, 1509 based on Foata normal form. 1/7582 useless extension candidates. Maximal degree in co-relation 46783. Up to 6726 conditions per place. [2024-05-12 12:50:19,796 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 228 selfloop transitions, 55 changer transitions 0/299 dead transitions. [2024-05-12 12:50:19,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 299 transitions, 4149 flow [2024-05-12 12:50:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 12:50:19,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947521865889213 [2024-05-12 12:50:19,797 INFO L175 Difference]: Start difference. First operand has 222 places, 278 transitions, 3411 flow. Second operand 7 states and 204 transitions. [2024-05-12 12:50:19,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 299 transitions, 4149 flow [2024-05-12 12:50:20,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 299 transitions, 4047 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:20,476 INFO L231 Difference]: Finished difference. Result has 225 places, 278 transitions, 3425 flow [2024-05-12 12:50:20,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3425, PETRI_PLACES=225, PETRI_TRANSITIONS=278} [2024-05-12 12:50:20,476 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 172 predicate places. [2024-05-12 12:50:20,477 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 278 transitions, 3425 flow [2024-05-12 12:50:20,477 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 12:50:20,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:20,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 12:50:20,477 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:20,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash -423886861, now seen corresponding path program 3 times [2024-05-12 12:50:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397824199] [2024-05-12 12:50:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:20,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:20,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397824199] [2024-05-12 12:50:20,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397824199] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:20,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:20,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:20,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742706906] [2024-05-12 12:50:20,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:20,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:20,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:20,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:20,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:20,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:20,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 278 transitions, 3425 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 12:50:20,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:20,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:20,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:21,657 INFO L124 PetriNetUnfolderBase]: 4478/7859 cut-off events. [2024-05-12 12:50:21,657 INFO L125 PetriNetUnfolderBase]: For 278472/278514 co-relation queries the response was YES. [2024-05-12 12:50:21,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47057 conditions, 7859 events. 4478/7859 cut-off events. For 278472/278514 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59548 event pairs, 1517 based on Foata normal form. 1/7590 useless extension candidates. Maximal degree in co-relation 46949. Up to 6733 conditions per place. [2024-05-12 12:50:21,882 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 222 selfloop transitions, 58 changer transitions 0/296 dead transitions. [2024-05-12 12:50:21,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 296 transitions, 4192 flow [2024-05-12 12:50:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-05-12 12:50:21,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577259475218659 [2024-05-12 12:50:21,883 INFO L175 Difference]: Start difference. First operand has 225 places, 278 transitions, 3425 flow. Second operand 7 states and 198 transitions. [2024-05-12 12:50:21,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 296 transitions, 4192 flow [2024-05-12 12:50:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 296 transitions, 4007 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 12:50:22,516 INFO L231 Difference]: Finished difference. Result has 224 places, 281 transitions, 3411 flow [2024-05-12 12:50:22,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3411, PETRI_PLACES=224, PETRI_TRANSITIONS=281} [2024-05-12 12:50:22,517 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 171 predicate places. [2024-05-12 12:50:22,517 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 281 transitions, 3411 flow [2024-05-12 12:50:22,517 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 12:50:22,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:22,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:22,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 12:50:22,518 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:22,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash -432450797, now seen corresponding path program 1 times [2024-05-12 12:50:22,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:22,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708952264] [2024-05-12 12:50:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:22,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:22,619 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 12:50:22,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708952264] [2024-05-12 12:50:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708952264] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:22,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:22,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106830652] [2024-05-12 12:50:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:22,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:22,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:22,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 281 transitions, 3411 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:22,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:22,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:22,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:23,632 INFO L124 PetriNetUnfolderBase]: 4493/7885 cut-off events. [2024-05-12 12:50:23,632 INFO L125 PetriNetUnfolderBase]: For 286431/286492 co-relation queries the response was YES. [2024-05-12 12:50:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47325 conditions, 7885 events. 4493/7885 cut-off events. For 286431/286492 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59691 event pairs, 1521 based on Foata normal form. 14/7630 useless extension candidates. Maximal degree in co-relation 47218. Up to 6780 conditions per place. [2024-05-12 12:50:23,721 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 240 selfloop transitions, 49 changer transitions 0/305 dead transitions. [2024-05-12 12:50:23,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 305 transitions, 4369 flow [2024-05-12 12:50:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 12:50:23,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-05-12 12:50:23,722 INFO L175 Difference]: Start difference. First operand has 224 places, 281 transitions, 3411 flow. Second operand 6 states and 179 transitions. [2024-05-12 12:50:23,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 305 transitions, 4369 flow [2024-05-12 12:50:24,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 305 transitions, 4273 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:24,425 INFO L231 Difference]: Finished difference. Result has 226 places, 287 transitions, 3507 flow [2024-05-12 12:50:24,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3507, PETRI_PLACES=226, PETRI_TRANSITIONS=287} [2024-05-12 12:50:24,426 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 173 predicate places. [2024-05-12 12:50:24,426 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 287 transitions, 3507 flow [2024-05-12 12:50:24,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:24,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:24,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:24,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 12:50:24,426 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:24,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash -417213677, now seen corresponding path program 2 times [2024-05-12 12:50:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:24,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709216996] [2024-05-12 12:50:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:24,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:24,543 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 12:50:24,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:24,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709216996] [2024-05-12 12:50:24,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709216996] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:24,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:24,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890896309] [2024-05-12 12:50:24,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:24,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:24,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:24,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:24,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 287 transitions, 3507 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 12:50:24,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:24,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:24,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:25,597 INFO L124 PetriNetUnfolderBase]: 4499/7895 cut-off events. [2024-05-12 12:50:25,597 INFO L125 PetriNetUnfolderBase]: For 293512/293573 co-relation queries the response was YES. [2024-05-12 12:50:25,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47476 conditions, 7895 events. 4499/7895 cut-off events. For 293512/293573 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59843 event pairs, 1521 based on Foata normal form. 14/7639 useless extension candidates. Maximal degree in co-relation 47368. Up to 6787 conditions per place. [2024-05-12 12:50:25,679 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 239 selfloop transitions, 50 changer transitions 0/305 dead transitions. [2024-05-12 12:50:25,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 305 transitions, 4297 flow [2024-05-12 12:50:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-05-12 12:50:25,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577259475218659 [2024-05-12 12:50:25,680 INFO L175 Difference]: Start difference. First operand has 226 places, 287 transitions, 3507 flow. Second operand 7 states and 198 transitions. [2024-05-12 12:50:25,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 305 transitions, 4297 flow [2024-05-12 12:50:26,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 305 transitions, 4219 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:26,433 INFO L231 Difference]: Finished difference. Result has 231 places, 290 transitions, 3585 flow [2024-05-12 12:50:26,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3585, PETRI_PLACES=231, PETRI_TRANSITIONS=290} [2024-05-12 12:50:26,434 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 178 predicate places. [2024-05-12 12:50:26,434 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 290 transitions, 3585 flow [2024-05-12 12:50:26,434 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 12:50:26,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:26,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:26,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 12:50:26,435 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:26,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash 401039253, now seen corresponding path program 4 times [2024-05-12 12:50:26,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:26,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655422023] [2024-05-12 12:50:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:26,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:26,555 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 12:50:26,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655422023] [2024-05-12 12:50:26,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655422023] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:26,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:26,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:26,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567594032] [2024-05-12 12:50:26,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:26,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:26,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:26,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:26,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:26,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 290 transitions, 3585 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 12:50:26,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:26,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:26,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:27,614 INFO L124 PetriNetUnfolderBase]: 4496/7890 cut-off events. [2024-05-12 12:50:27,615 INFO L125 PetriNetUnfolderBase]: For 299311/299382 co-relation queries the response was YES. [2024-05-12 12:50:27,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47516 conditions, 7890 events. 4496/7890 cut-off events. For 299311/299382 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59864 event pairs, 1549 based on Foata normal form. 25/7651 useless extension candidates. Maximal degree in co-relation 47407. Up to 6758 conditions per place. [2024-05-12 12:50:27,705 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 224 selfloop transitions, 61 changer transitions 0/301 dead transitions. [2024-05-12 12:50:27,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 301 transitions, 4181 flow [2024-05-12 12:50:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 12:50:27,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685131195335277 [2024-05-12 12:50:27,706 INFO L175 Difference]: Start difference. First operand has 231 places, 290 transitions, 3585 flow. Second operand 7 states and 195 transitions. [2024-05-12 12:50:27,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 301 transitions, 4181 flow [2024-05-12 12:50:28,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 301 transitions, 4055 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:28,625 INFO L231 Difference]: Finished difference. Result has 233 places, 290 transitions, 3587 flow [2024-05-12 12:50:28,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3587, PETRI_PLACES=233, PETRI_TRANSITIONS=290} [2024-05-12 12:50:28,626 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 180 predicate places. [2024-05-12 12:50:28,626 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 290 transitions, 3587 flow [2024-05-12 12:50:28,626 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 12:50:28,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:28,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:28,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 12:50:28,626 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:28,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 332894777, now seen corresponding path program 3 times [2024-05-12 12:50:28,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:28,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295134555] [2024-05-12 12:50:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:28,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:28,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:28,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295134555] [2024-05-12 12:50:28,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295134555] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:28,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:28,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:28,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051668771] [2024-05-12 12:50:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:28,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:28,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:28,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:28,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 290 transitions, 3587 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:28,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:28,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:28,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:29,753 INFO L124 PetriNetUnfolderBase]: 4502/7907 cut-off events. [2024-05-12 12:50:29,754 INFO L125 PetriNetUnfolderBase]: For 305522/305585 co-relation queries the response was YES. [2024-05-12 12:50:29,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47695 conditions, 7907 events. 4502/7907 cut-off events. For 305522/305585 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59942 event pairs, 1525 based on Foata normal form. 13/7648 useless extension candidates. Maximal degree in co-relation 47585. Up to 6790 conditions per place. [2024-05-12 12:50:29,841 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 241 selfloop transitions, 57 changer transitions 0/314 dead transitions. [2024-05-12 12:50:29,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 314 transitions, 4542 flow [2024-05-12 12:50:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 12:50:29,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-05-12 12:50:29,842 INFO L175 Difference]: Start difference. First operand has 233 places, 290 transitions, 3587 flow. Second operand 6 states and 183 transitions. [2024-05-12 12:50:29,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 314 transitions, 4542 flow [2024-05-12 12:50:30,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 314 transitions, 4357 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 12:50:30,723 INFO L231 Difference]: Finished difference. Result has 232 places, 293 transitions, 3569 flow [2024-05-12 12:50:30,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3569, PETRI_PLACES=232, PETRI_TRANSITIONS=293} [2024-05-12 12:50:30,723 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 179 predicate places. [2024-05-12 12:50:30,723 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 293 transitions, 3569 flow [2024-05-12 12:50:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:30,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:30,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:30,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 12:50:30,724 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:30,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash 407712437, now seen corresponding path program 4 times [2024-05-12 12:50:30,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:30,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011974623] [2024-05-12 12:50:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:30,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:30,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:30,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011974623] [2024-05-12 12:50:30,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011974623] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:30,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:30,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429231330] [2024-05-12 12:50:30,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:30,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:30,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:30,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:30,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:30,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:30,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 293 transitions, 3569 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 12:50:30,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:30,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:30,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:32,181 INFO L124 PetriNetUnfolderBase]: 4508/7912 cut-off events. [2024-05-12 12:50:32,181 INFO L125 PetriNetUnfolderBase]: For 312144/312188 co-relation queries the response was YES. [2024-05-12 12:50:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47808 conditions, 7912 events. 4508/7912 cut-off events. For 312144/312188 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60037 event pairs, 1536 based on Foata normal form. 3/7644 useless extension candidates. Maximal degree in co-relation 47697. Up to 6797 conditions per place. [2024-05-12 12:50:32,259 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 233 selfloop transitions, 59 changer transitions 0/308 dead transitions. [2024-05-12 12:50:32,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 308 transitions, 4364 flow [2024-05-12 12:50:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 12:50:32,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743440233236151 [2024-05-12 12:50:32,260 INFO L175 Difference]: Start difference. First operand has 232 places, 293 transitions, 3569 flow. Second operand 7 states and 197 transitions. [2024-05-12 12:50:32,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 308 transitions, 4364 flow [2024-05-12 12:50:33,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 308 transitions, 4189 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:33,101 INFO L231 Difference]: Finished difference. Result has 235 places, 296 transitions, 3569 flow [2024-05-12 12:50:33,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3569, PETRI_PLACES=235, PETRI_TRANSITIONS=296} [2024-05-12 12:50:33,102 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 182 predicate places. [2024-05-12 12:50:33,102 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 296 transitions, 3569 flow [2024-05-12 12:50:33,102 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 12:50:33,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:33,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:33,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 12:50:33,102 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:33,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash 547917287, now seen corresponding path program 5 times [2024-05-12 12:50:33,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:33,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14436540] [2024-05-12 12:50:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:33,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:33,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:33,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14436540] [2024-05-12 12:50:33,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14436540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:33,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:33,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715057590] [2024-05-12 12:50:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:33,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:33,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:33,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:33,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:33,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 296 transitions, 3569 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:33,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:33,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:33,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:34,294 INFO L124 PetriNetUnfolderBase]: 4514/7927 cut-off events. [2024-05-12 12:50:34,295 INFO L125 PetriNetUnfolderBase]: For 318480/318540 co-relation queries the response was YES. [2024-05-12 12:50:34,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47952 conditions, 7927 events. 4514/7927 cut-off events. For 318480/318540 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60094 event pairs, 1525 based on Foata normal form. 11/7664 useless extension candidates. Maximal degree in co-relation 47841. Up to 6804 conditions per place. [2024-05-12 12:50:34,387 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 237 selfloop transitions, 64 changer transitions 0/317 dead transitions. [2024-05-12 12:50:34,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 317 transitions, 4408 flow [2024-05-12 12:50:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 12:50:34,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-05-12 12:50:34,389 INFO L175 Difference]: Start difference. First operand has 235 places, 296 transitions, 3569 flow. Second operand 6 states and 178 transitions. [2024-05-12 12:50:34,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 317 transitions, 4408 flow [2024-05-12 12:50:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 317 transitions, 4306 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:35,454 INFO L231 Difference]: Finished difference. Result has 237 places, 300 transitions, 3662 flow [2024-05-12 12:50:35,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3662, PETRI_PLACES=237, PETRI_TRANSITIONS=300} [2024-05-12 12:50:35,454 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 184 predicate places. [2024-05-12 12:50:35,455 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 300 transitions, 3662 flow [2024-05-12 12:50:35,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:35,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:35,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:35,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 12:50:35,455 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:35,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1883499689, now seen corresponding path program 6 times [2024-05-12 12:50:35,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:35,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805840915] [2024-05-12 12:50:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:35,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:35,569 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 12:50:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805840915] [2024-05-12 12:50:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805840915] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:35,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:35,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:35,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627430771] [2024-05-12 12:50:35,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:35,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:35,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:35,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 300 transitions, 3662 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 12:50:35,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:35,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:35,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:36,869 INFO L124 PetriNetUnfolderBase]: 4511/7915 cut-off events. [2024-05-12 12:50:36,869 INFO L125 PetriNetUnfolderBase]: For 323728/323770 co-relation queries the response was YES. [2024-05-12 12:50:36,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47960 conditions, 7915 events. 4511/7915 cut-off events. For 323728/323770 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60060 event pairs, 1533 based on Foata normal form. 1/7640 useless extension candidates. Maximal degree in co-relation 47847. Up to 6801 conditions per place. [2024-05-12 12:50:36,977 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 232 selfloop transitions, 64 changer transitions 0/312 dead transitions. [2024-05-12 12:50:36,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 312 transitions, 4418 flow [2024-05-12 12:50:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 12:50:36,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 12:50:36,978 INFO L175 Difference]: Start difference. First operand has 237 places, 300 transitions, 3662 flow. Second operand 7 states and 196 transitions. [2024-05-12 12:50:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 312 transitions, 4418 flow [2024-05-12 12:50:38,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 312 transitions, 4304 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 12:50:38,033 INFO L231 Difference]: Finished difference. Result has 242 places, 300 transitions, 3682 flow [2024-05-12 12:50:38,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3548, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3682, PETRI_PLACES=242, PETRI_TRANSITIONS=300} [2024-05-12 12:50:38,034 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 189 predicate places. [2024-05-12 12:50:38,034 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 300 transitions, 3682 flow [2024-05-12 12:50:38,034 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 12:50:38,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:38,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:38,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 12:50:38,035 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:38,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 953963283, now seen corresponding path program 7 times [2024-05-12 12:50:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:38,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642104593] [2024-05-12 12:50:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:38,166 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 12:50:38,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642104593] [2024-05-12 12:50:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642104593] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:38,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418308904] [2024-05-12 12:50:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:38,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:38,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:38,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 300 transitions, 3682 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 12:50:38,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:38,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:38,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:39,374 INFO L124 PetriNetUnfolderBase]: 4508/7911 cut-off events. [2024-05-12 12:50:39,375 INFO L125 PetriNetUnfolderBase]: For 328696/328738 co-relation queries the response was YES. [2024-05-12 12:50:39,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47972 conditions, 7911 events. 4508/7911 cut-off events. For 328696/328738 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60057 event pairs, 1533 based on Foata normal form. 1/7636 useless extension candidates. Maximal degree in co-relation 47858. Up to 6798 conditions per place. [2024-05-12 12:50:39,473 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 232 selfloop transitions, 65 changer transitions 0/313 dead transitions. [2024-05-12 12:50:39,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 313 transitions, 4306 flow [2024-05-12 12:50:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:50:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:50:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 12:50:39,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487528344671202 [2024-05-12 12:50:39,474 INFO L175 Difference]: Start difference. First operand has 242 places, 300 transitions, 3682 flow. Second operand 9 states and 242 transitions. [2024-05-12 12:50:39,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 313 transitions, 4306 flow [2024-05-12 12:50:40,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 313 transitions, 4119 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:40,377 INFO L231 Difference]: Finished difference. Result has 245 places, 300 transitions, 3631 flow [2024-05-12 12:50:40,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3495, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3631, PETRI_PLACES=245, PETRI_TRANSITIONS=300} [2024-05-12 12:50:40,378 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 192 predicate places. [2024-05-12 12:50:40,378 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 300 transitions, 3631 flow [2024-05-12 12:50:40,378 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 12:50:40,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:40,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:40,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 12:50:40,379 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:40,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1488111831, now seen corresponding path program 1 times [2024-05-12 12:50:40,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:40,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983407617] [2024-05-12 12:50:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:40,503 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 12:50:40,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:40,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983407617] [2024-05-12 12:50:40,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983407617] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:40,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:40,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:50:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590042824] [2024-05-12 12:50:40,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:40,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:50:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:50:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:50:40,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:50:40,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 300 transitions, 3631 flow. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:40,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:40,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:50:40,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:41,702 INFO L124 PetriNetUnfolderBase]: 4379/7837 cut-off events. [2024-05-12 12:50:41,702 INFO L125 PetriNetUnfolderBase]: For 360033/360109 co-relation queries the response was YES. [2024-05-12 12:50:41,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47495 conditions, 7837 events. 4379/7837 cut-off events. For 360033/360109 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 60198 event pairs, 1452 based on Foata normal form. 44/7565 useless extension candidates. Maximal degree in co-relation 47380. Up to 6428 conditions per place. [2024-05-12 12:50:41,787 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 241 selfloop transitions, 31 changer transitions 0/323 dead transitions. [2024-05-12 12:50:41,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 323 transitions, 4265 flow [2024-05-12 12:50:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:50:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:50:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 12:50:41,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-05-12 12:50:41,789 INFO L175 Difference]: Start difference. First operand has 245 places, 300 transitions, 3631 flow. Second operand 6 states and 183 transitions. [2024-05-12 12:50:41,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 323 transitions, 4265 flow [2024-05-12 12:50:42,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 323 transitions, 4075 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 12:50:42,644 INFO L231 Difference]: Finished difference. Result has 242 places, 301 transitions, 3525 flow [2024-05-12 12:50:42,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3525, PETRI_PLACES=242, PETRI_TRANSITIONS=301} [2024-05-12 12:50:42,645 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 189 predicate places. [2024-05-12 12:50:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 301 transitions, 3525 flow [2024-05-12 12:50:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:42,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:42,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:42,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 12:50:42,645 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:42,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1866911527, now seen corresponding path program 2 times [2024-05-12 12:50:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:42,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580939922] [2024-05-12 12:50:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:42,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:42,791 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 12:50:42,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:42,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580939922] [2024-05-12 12:50:42,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580939922] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:42,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:42,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:42,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281042742] [2024-05-12 12:50:42,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:42,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:42,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:42,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:42,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:42,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:50:42,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 301 transitions, 3525 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:42,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:42,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:50:42,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:43,951 INFO L124 PetriNetUnfolderBase]: 4456/7981 cut-off events. [2024-05-12 12:50:43,952 INFO L125 PetriNetUnfolderBase]: For 368868/368935 co-relation queries the response was YES. [2024-05-12 12:50:44,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48298 conditions, 7981 events. 4456/7981 cut-off events. For 368868/368935 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 61697 event pairs, 1485 based on Foata normal form. 31/7686 useless extension candidates. Maximal degree in co-relation 48182. Up to 6554 conditions per place. [2024-05-12 12:50:44,048 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 237 selfloop transitions, 31 changer transitions 0/319 dead transitions. [2024-05-12 12:50:44,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 319 transitions, 4139 flow [2024-05-12 12:50:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:50:44,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860058309037901 [2024-05-12 12:50:44,056 INFO L175 Difference]: Start difference. First operand has 242 places, 301 transitions, 3525 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:50:44,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 319 transitions, 4139 flow [2024-05-12 12:50:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 319 transitions, 4073 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:45,095 INFO L231 Difference]: Finished difference. Result has 245 places, 302 transitions, 3545 flow [2024-05-12 12:50:45,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3545, PETRI_PLACES=245, PETRI_TRANSITIONS=302} [2024-05-12 12:50:45,096 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 192 predicate places. [2024-05-12 12:50:45,096 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 302 transitions, 3545 flow [2024-05-12 12:50:45,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:45,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:45,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:45,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 12:50:45,097 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:45,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -524841139, now seen corresponding path program 3 times [2024-05-12 12:50:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:45,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816251611] [2024-05-12 12:50:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:45,257 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 12:50:45,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:45,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816251611] [2024-05-12 12:50:45,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816251611] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:45,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:45,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:45,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951190564] [2024-05-12 12:50:45,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:45,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:45,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:45,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-05-12 12:50:45,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 302 transitions, 3545 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:45,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:45,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-05-12 12:50:45,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:46,542 INFO L124 PetriNetUnfolderBase]: 4478/8011 cut-off events. [2024-05-12 12:50:46,543 INFO L125 PetriNetUnfolderBase]: For 361552/361616 co-relation queries the response was YES. [2024-05-12 12:50:46,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48179 conditions, 8011 events. 4478/8011 cut-off events. For 361552/361616 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 61920 event pairs, 1472 based on Foata normal form. 30/7716 useless extension candidates. Maximal degree in co-relation 48062. Up to 6423 conditions per place. [2024-05-12 12:50:46,623 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 241 selfloop transitions, 34 changer transitions 0/326 dead transitions. [2024-05-12 12:50:46,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 326 transitions, 4205 flow [2024-05-12 12:50:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-05-12 12:50:46,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841836734693877 [2024-05-12 12:50:46,625 INFO L175 Difference]: Start difference. First operand has 245 places, 302 transitions, 3545 flow. Second operand 8 states and 229 transitions. [2024-05-12 12:50:46,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 326 transitions, 4205 flow [2024-05-12 12:50:47,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 326 transitions, 4137 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:47,716 INFO L231 Difference]: Finished difference. Result has 248 places, 303 transitions, 3569 flow [2024-05-12 12:50:47,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3569, PETRI_PLACES=248, PETRI_TRANSITIONS=303} [2024-05-12 12:50:47,718 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 195 predicate places. [2024-05-12 12:50:47,718 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 303 transitions, 3569 flow [2024-05-12 12:50:47,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:50:47,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:47,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:47,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 12:50:47,718 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:47,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash -707663213, now seen corresponding path program 1 times [2024-05-12 12:50:47,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:47,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423440066] [2024-05-12 12:50:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:47,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:50:47,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:47,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423440066] [2024-05-12 12:50:47,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423440066] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:47,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:47,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:47,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181806658] [2024-05-12 12:50:47,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:47,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:47,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:47,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:47,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 303 transitions, 3569 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 12:50:47,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:49,116 INFO L124 PetriNetUnfolderBase]: 4762/8467 cut-off events. [2024-05-12 12:50:49,116 INFO L125 PetriNetUnfolderBase]: For 359040/359085 co-relation queries the response was YES. [2024-05-12 12:50:49,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50356 conditions, 8467 events. 4762/8467 cut-off events. For 359040/359085 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 65274 event pairs, 1435 based on Foata normal form. 4/8184 useless extension candidates. Maximal degree in co-relation 50238. Up to 7054 conditions per place. [2024-05-12 12:50:49,217 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 293 selfloop transitions, 28 changer transitions 0/337 dead transitions. [2024-05-12 12:50:49,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 337 transitions, 4488 flow [2024-05-12 12:50:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-05-12 12:50:49,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-05-12 12:50:49,219 INFO L175 Difference]: Start difference. First operand has 248 places, 303 transitions, 3569 flow. Second operand 8 states and 231 transitions. [2024-05-12 12:50:49,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 337 transitions, 4488 flow [2024-05-12 12:50:50,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 337 transitions, 4410 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 12:50:50,270 INFO L231 Difference]: Finished difference. Result has 250 places, 306 transitions, 3606 flow [2024-05-12 12:50:50,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3606, PETRI_PLACES=250, PETRI_TRANSITIONS=306} [2024-05-12 12:50:50,270 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 197 predicate places. [2024-05-12 12:50:50,270 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 306 transitions, 3606 flow [2024-05-12 12:50:50,271 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 12:50:50,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:50,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:50,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 12:50:50,271 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:50,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -707602763, now seen corresponding path program 2 times [2024-05-12 12:50:50,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:50,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596190279] [2024-05-12 12:50:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:50,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:50,396 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 12:50:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596190279] [2024-05-12 12:50:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596190279] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:50,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:50,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460084754] [2024-05-12 12:50:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:50,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:50,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 306 transitions, 3606 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 12:50:50,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:50,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:50,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:51,681 INFO L124 PetriNetUnfolderBase]: 4742/8321 cut-off events. [2024-05-12 12:50:51,682 INFO L125 PetriNetUnfolderBase]: For 354057/354102 co-relation queries the response was YES. [2024-05-12 12:50:51,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49652 conditions, 8321 events. 4742/8321 cut-off events. For 354057/354102 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 63578 event pairs, 1588 based on Foata normal form. 4/8036 useless extension candidates. Maximal degree in co-relation 49533. Up to 7216 conditions per place. [2024-05-12 12:50:51,764 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 293 selfloop transitions, 21 changer transitions 0/330 dead transitions. [2024-05-12 12:50:51,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 330 transitions, 4296 flow [2024-05-12 12:50:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:51,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-05-12 12:50:51,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688775510204082 [2024-05-12 12:50:51,765 INFO L175 Difference]: Start difference. First operand has 250 places, 306 transitions, 3606 flow. Second operand 8 states and 223 transitions. [2024-05-12 12:50:51,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 330 transitions, 4296 flow [2024-05-12 12:50:52,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 330 transitions, 4205 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-05-12 12:50:52,977 INFO L231 Difference]: Finished difference. Result has 253 places, 306 transitions, 3563 flow [2024-05-12 12:50:52,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3563, PETRI_PLACES=253, PETRI_TRANSITIONS=306} [2024-05-12 12:50:52,977 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 200 predicate places. [2024-05-12 12:50:52,977 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 306 transitions, 3563 flow [2024-05-12 12:50:52,978 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 12:50:52,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:52,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:52,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 12:50:52,978 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:52,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash -704801293, now seen corresponding path program 1 times [2024-05-12 12:50:52,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034595705] [2024-05-12 12:50:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:52,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:53,094 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 12:50:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034595705] [2024-05-12 12:50:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034595705] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:53,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:53,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:53,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057852341] [2024-05-12 12:50:53,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:53,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:53,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:53,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:53,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 306 transitions, 3563 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 12:50:53,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:53,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:53,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:54,259 INFO L124 PetriNetUnfolderBase]: 4766/8358 cut-off events. [2024-05-12 12:50:54,260 INFO L125 PetriNetUnfolderBase]: For 357404/357449 co-relation queries the response was YES. [2024-05-12 12:50:54,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49603 conditions, 8358 events. 4766/8358 cut-off events. For 357404/357449 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 63837 event pairs, 1587 based on Foata normal form. 2/8065 useless extension candidates. Maximal degree in co-relation 49483. Up to 7263 conditions per place. [2024-05-12 12:50:54,355 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 295 selfloop transitions, 24 changer transitions 0/335 dead transitions. [2024-05-12 12:50:54,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 335 transitions, 4509 flow [2024-05-12 12:50:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:50:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:50:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-05-12 12:50:54,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688775510204082 [2024-05-12 12:50:54,357 INFO L175 Difference]: Start difference. First operand has 253 places, 306 transitions, 3563 flow. Second operand 8 states and 223 transitions. [2024-05-12 12:50:54,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 335 transitions, 4509 flow [2024-05-12 12:50:55,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 335 transitions, 4437 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-05-12 12:50:55,572 INFO L231 Difference]: Finished difference. Result has 253 places, 313 transitions, 3658 flow [2024-05-12 12:50:55,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3658, PETRI_PLACES=253, PETRI_TRANSITIONS=313} [2024-05-12 12:50:55,573 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 200 predicate places. [2024-05-12 12:50:55,573 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 313 transitions, 3658 flow [2024-05-12 12:50:55,573 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 12:50:55,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:55,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:55,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 12:50:55,574 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:55,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash -423875949, now seen corresponding path program 3 times [2024-05-12 12:50:55,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:55,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839188541] [2024-05-12 12:50:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:55,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:55,693 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 12:50:55,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:55,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839188541] [2024-05-12 12:50:55,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839188541] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:55,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:55,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:55,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291183665] [2024-05-12 12:50:55,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:55,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:55,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:55,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:55,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:55,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:55,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 313 transitions, 3658 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 12:50:55,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:55,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:55,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:57,042 INFO L124 PetriNetUnfolderBase]: 4808/8429 cut-off events. [2024-05-12 12:50:57,042 INFO L125 PetriNetUnfolderBase]: For 379039/379084 co-relation queries the response was YES. [2024-05-12 12:50:57,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50681 conditions, 8429 events. 4808/8429 cut-off events. For 379039/379084 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 64482 event pairs, 1601 based on Foata normal form. 4/8131 useless extension candidates. Maximal degree in co-relation 50560. Up to 7197 conditions per place. [2024-05-12 12:50:57,133 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 256 selfloop transitions, 61 changer transitions 0/333 dead transitions. [2024-05-12 12:50:57,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 333 transitions, 4434 flow [2024-05-12 12:50:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 12:50:57,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830903790087464 [2024-05-12 12:50:57,134 INFO L175 Difference]: Start difference. First operand has 253 places, 313 transitions, 3658 flow. Second operand 7 states and 200 transitions. [2024-05-12 12:50:57,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 333 transitions, 4434 flow [2024-05-12 12:50:58,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 333 transitions, 4360 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-05-12 12:50:58,143 INFO L231 Difference]: Finished difference. Result has 256 places, 316 transitions, 3816 flow [2024-05-12 12:50:58,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3816, PETRI_PLACES=256, PETRI_TRANSITIONS=316} [2024-05-12 12:50:58,144 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 203 predicate places. [2024-05-12 12:50:58,144 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 316 transitions, 3816 flow [2024-05-12 12:50:58,144 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 12:50:58,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:50:58,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:50:58,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 12:50:58,145 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:50:58,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:50:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash -589510123, now seen corresponding path program 2 times [2024-05-12 12:50:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:50:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528135978] [2024-05-12 12:50:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:50:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:50:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:50:58,257 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 12:50:58,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:50:58,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528135978] [2024-05-12 12:50:58,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528135978] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:50:58,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:50:58,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:50:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099917994] [2024-05-12 12:50:58,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:50:58,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:50:58,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:50:58,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:50:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:50:58,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:50:58,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 316 transitions, 3816 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 12:50:58,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:50:58,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:50:58,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:50:59,461 INFO L124 PetriNetUnfolderBase]: 4852/8498 cut-off events. [2024-05-12 12:50:59,461 INFO L125 PetriNetUnfolderBase]: For 394105/394166 co-relation queries the response was YES. [2024-05-12 12:50:59,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51959 conditions, 8498 events. 4852/8498 cut-off events. For 394105/394166 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65043 event pairs, 1604 based on Foata normal form. 13/8202 useless extension candidates. Maximal degree in co-relation 51836. Up to 7153 conditions per place. [2024-05-12 12:50:59,566 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 237 selfloop transitions, 95 changer transitions 0/348 dead transitions. [2024-05-12 12:50:59,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 348 transitions, 5258 flow [2024-05-12 12:50:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:50:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:50:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 12:50:59,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.597667638483965 [2024-05-12 12:50:59,567 INFO L175 Difference]: Start difference. First operand has 256 places, 316 transitions, 3816 flow. Second operand 7 states and 205 transitions. [2024-05-12 12:50:59,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 348 transitions, 5258 flow [2024-05-12 12:51:00,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 348 transitions, 5048 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:00,791 INFO L231 Difference]: Finished difference. Result has 259 places, 330 transitions, 4071 flow [2024-05-12 12:51:00,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4071, PETRI_PLACES=259, PETRI_TRANSITIONS=330} [2024-05-12 12:51:00,792 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 206 predicate places. [2024-05-12 12:51:00,792 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 330 transitions, 4071 flow [2024-05-12 12:51:00,792 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 12:51:00,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:00,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:00,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 12:51:00,792 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:00,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:00,793 INFO L85 PathProgramCache]: Analyzing trace with hash -417204749, now seen corresponding path program 3 times [2024-05-12 12:51:00,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:00,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116764170] [2024-05-12 12:51:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:00,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:00,901 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 12:51:00,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:00,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116764170] [2024-05-12 12:51:00,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116764170] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:00,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:00,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:00,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207087397] [2024-05-12 12:51:00,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:00,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:00,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:00,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:00,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:00,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 330 transitions, 4071 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 12:51:00,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:00,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:00,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:02,242 INFO L124 PetriNetUnfolderBase]: 4846/8490 cut-off events. [2024-05-12 12:51:02,242 INFO L125 PetriNetUnfolderBase]: For 390969/391030 co-relation queries the response was YES. [2024-05-12 12:51:02,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51550 conditions, 8490 events. 4846/8490 cut-off events. For 390969/391030 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 64955 event pairs, 1604 based on Foata normal form. 13/8194 useless extension candidates. Maximal degree in co-relation 51425. Up to 7148 conditions per place. [2024-05-12 12:51:02,343 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 233 selfloop transitions, 98 changer transitions 0/347 dead transitions. [2024-05-12 12:51:02,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 347 transitions, 5115 flow [2024-05-12 12:51:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 12:51:02,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-05-12 12:51:02,345 INFO L175 Difference]: Start difference. First operand has 259 places, 330 transitions, 4071 flow. Second operand 7 states and 203 transitions. [2024-05-12 12:51:02,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 347 transitions, 5115 flow [2024-05-12 12:51:03,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 347 transitions, 4978 flow, removed 61 selfloop flow, removed 1 redundant places. [2024-05-12 12:51:03,441 INFO L231 Difference]: Finished difference. Result has 265 places, 330 transitions, 4137 flow [2024-05-12 12:51:03,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4137, PETRI_PLACES=265, PETRI_TRANSITIONS=330} [2024-05-12 12:51:03,442 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 212 predicate places. [2024-05-12 12:51:03,442 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 330 transitions, 4137 flow [2024-05-12 12:51:03,442 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 12:51:03,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:03,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:03,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 12:51:03,443 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:03,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:03,443 INFO L85 PathProgramCache]: Analyzing trace with hash -417195821, now seen corresponding path program 1 times [2024-05-12 12:51:03,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:03,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915821489] [2024-05-12 12:51:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:03,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:03,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:03,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915821489] [2024-05-12 12:51:03,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915821489] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:03,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:03,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999736079] [2024-05-12 12:51:03,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:03,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:03,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:03,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:03,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 330 transitions, 4137 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 12:51:03,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:03,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:03,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:04,863 INFO L124 PetriNetUnfolderBase]: 4888/8562 cut-off events. [2024-05-12 12:51:04,864 INFO L125 PetriNetUnfolderBase]: For 406332/406393 co-relation queries the response was YES. [2024-05-12 12:51:04,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52247 conditions, 8562 events. 4888/8562 cut-off events. For 406332/406393 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 65563 event pairs, 1609 based on Foata normal form. 15/8264 useless extension candidates. Maximal degree in co-relation 52120. Up to 7332 conditions per place. [2024-05-12 12:51:04,970 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 271 selfloop transitions, 63 changer transitions 0/350 dead transitions. [2024-05-12 12:51:04,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 350 transitions, 4917 flow [2024-05-12 12:51:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 12:51:04,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830903790087464 [2024-05-12 12:51:04,971 INFO L175 Difference]: Start difference. First operand has 265 places, 330 transitions, 4137 flow. Second operand 7 states and 200 transitions. [2024-05-12 12:51:04,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 350 transitions, 4917 flow [2024-05-12 12:51:05,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 350 transitions, 4718 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:05,948 INFO L231 Difference]: Finished difference. Result has 267 places, 333 transitions, 4144 flow [2024-05-12 12:51:05,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4144, PETRI_PLACES=267, PETRI_TRANSITIONS=333} [2024-05-12 12:51:05,948 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 214 predicate places. [2024-05-12 12:51:05,949 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 333 transitions, 4144 flow [2024-05-12 12:51:05,949 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 12:51:05,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:05,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:05,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 12:51:05,950 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:05,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash 401050165, now seen corresponding path program 4 times [2024-05-12 12:51:05,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:05,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937802065] [2024-05-12 12:51:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:05,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:06,115 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 12:51:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937802065] [2024-05-12 12:51:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937802065] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:06,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350096884] [2024-05-12 12:51:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:06,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:06,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 333 transitions, 4144 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 12:51:06,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:06,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:06,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:07,407 INFO L124 PetriNetUnfolderBase]: 4904/8591 cut-off events. [2024-05-12 12:51:07,407 INFO L125 PetriNetUnfolderBase]: For 414214/414282 co-relation queries the response was YES. [2024-05-12 12:51:07,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52708 conditions, 8591 events. 4904/8591 cut-off events. For 414214/414282 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 65942 event pairs, 1639 based on Foata normal form. 24/8307 useless extension candidates. Maximal degree in co-relation 52580. Up to 7332 conditions per place. [2024-05-12 12:51:07,530 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 270 selfloop transitions, 64 changer transitions 0/350 dead transitions. [2024-05-12 12:51:07,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 350 transitions, 4960 flow [2024-05-12 12:51:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-05-12 12:51:07,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577259475218659 [2024-05-12 12:51:07,532 INFO L175 Difference]: Start difference. First operand has 267 places, 333 transitions, 4144 flow. Second operand 7 states and 198 transitions. [2024-05-12 12:51:07,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 350 transitions, 4960 flow [2024-05-12 12:51:08,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 350 transitions, 4776 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:08,840 INFO L231 Difference]: Finished difference. Result has 269 places, 336 transitions, 4212 flow [2024-05-12 12:51:08,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4212, PETRI_PLACES=269, PETRI_TRANSITIONS=336} [2024-05-12 12:51:08,841 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 216 predicate places. [2024-05-12 12:51:08,841 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 336 transitions, 4212 flow [2024-05-12 12:51:08,841 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 12:51:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:08,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 12:51:08,843 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:08,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash 413298655, now seen corresponding path program 4 times [2024-05-12 12:51:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:08,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116537798] [2024-05-12 12:51:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:08,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116537798] [2024-05-12 12:51:08,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116537798] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:08,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:08,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:08,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295587153] [2024-05-12 12:51:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:08,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:08,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:09,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 336 transitions, 4212 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 12:51:09,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:09,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:09,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:10,275 INFO L124 PetriNetUnfolderBase]: 4948/8662 cut-off events. [2024-05-12 12:51:10,275 INFO L125 PetriNetUnfolderBase]: For 428060/428142 co-relation queries the response was YES. [2024-05-12 12:51:10,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53505 conditions, 8662 events. 4948/8662 cut-off events. For 428060/428142 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 66449 event pairs, 1649 based on Foata normal form. 29/8379 useless extension candidates. Maximal degree in co-relation 53376. Up to 7278 conditions per place. [2024-05-12 12:51:10,386 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 236 selfloop transitions, 111 changer transitions 0/363 dead transitions. [2024-05-12 12:51:10,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 363 transitions, 5852 flow [2024-05-12 12:51:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 12:51:10,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.597667638483965 [2024-05-12 12:51:10,390 INFO L175 Difference]: Start difference. First operand has 269 places, 336 transitions, 4212 flow. Second operand 7 states and 205 transitions. [2024-05-12 12:51:10,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 363 transitions, 5852 flow [2024-05-12 12:51:11,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 363 transitions, 5622 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:11,674 INFO L231 Difference]: Finished difference. Result has 271 places, 348 transitions, 4477 flow [2024-05-12 12:51:11,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4477, PETRI_PLACES=271, PETRI_TRANSITIONS=348} [2024-05-12 12:51:11,674 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 218 predicate places. [2024-05-12 12:51:11,675 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 348 transitions, 4477 flow [2024-05-12 12:51:11,675 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 12:51:11,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:11,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:11,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 12:51:11,676 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:11,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1965861643, now seen corresponding path program 5 times [2024-05-12 12:51:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:11,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259276584] [2024-05-12 12:51:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:11,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:11,804 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 12:51:11,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:11,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259276584] [2024-05-12 12:51:11,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259276584] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:11,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:11,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117257700] [2024-05-12 12:51:11,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:11,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:11,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:11,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:11,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:11,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:11,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 348 transitions, 4477 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 12:51:11,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:11,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:11,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:13,172 INFO L124 PetriNetUnfolderBase]: 4942/8654 cut-off events. [2024-05-12 12:51:13,172 INFO L125 PetriNetUnfolderBase]: For 421690/421772 co-relation queries the response was YES. [2024-05-12 12:51:13,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52803 conditions, 8654 events. 4942/8654 cut-off events. For 421690/421772 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 66421 event pairs, 1649 based on Foata normal form. 29/8371 useless extension candidates. Maximal degree in co-relation 52673. Up to 7273 conditions per place. [2024-05-12 12:51:13,299 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 234 selfloop transitions, 112 changer transitions 0/362 dead transitions. [2024-05-12 12:51:13,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 362 transitions, 5693 flow [2024-05-12 12:51:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 12:51:13,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-05-12 12:51:13,301 INFO L175 Difference]: Start difference. First operand has 271 places, 348 transitions, 4477 flow. Second operand 7 states and 203 transitions. [2024-05-12 12:51:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 362 transitions, 5693 flow [2024-05-12 12:51:14,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 362 transitions, 5491 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:14,767 INFO L231 Difference]: Finished difference. Result has 276 places, 348 transitions, 4506 flow [2024-05-12 12:51:14,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4275, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4506, PETRI_PLACES=276, PETRI_TRANSITIONS=348} [2024-05-12 12:51:14,768 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 223 predicate places. [2024-05-12 12:51:14,768 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 348 transitions, 4506 flow [2024-05-12 12:51:14,768 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 12:51:14,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:14,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 12:51:14,769 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:14,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2045438023, now seen corresponding path program 6 times [2024-05-12 12:51:14,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:14,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448803988] [2024-05-12 12:51:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:14,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:14,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:14,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448803988] [2024-05-12 12:51:14,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448803988] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:14,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:14,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:14,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32523850] [2024-05-12 12:51:14,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:14,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:14,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:14,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 348 transitions, 4506 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 12:51:14,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:14,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:14,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:16,367 INFO L124 PetriNetUnfolderBase]: 4936/8646 cut-off events. [2024-05-12 12:51:16,368 INFO L125 PetriNetUnfolderBase]: For 420217/420299 co-relation queries the response was YES. [2024-05-12 12:51:16,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52646 conditions, 8646 events. 4936/8646 cut-off events. For 420217/420299 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 66339 event pairs, 1649 based on Foata normal form. 29/8363 useless extension candidates. Maximal degree in co-relation 52514. Up to 7268 conditions per place. [2024-05-12 12:51:16,462 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 229 selfloop transitions, 116 changer transitions 0/361 dead transitions. [2024-05-12 12:51:16,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 361 transitions, 5558 flow [2024-05-12 12:51:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:51:16,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860058309037901 [2024-05-12 12:51:16,463 INFO L175 Difference]: Start difference. First operand has 276 places, 348 transitions, 4506 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:51:16,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 361 transitions, 5558 flow [2024-05-12 12:51:17,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 361 transitions, 5246 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-05-12 12:51:17,703 INFO L231 Difference]: Finished difference. Result has 277 places, 348 transitions, 4433 flow [2024-05-12 12:51:17,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4433, PETRI_PLACES=277, PETRI_TRANSITIONS=348} [2024-05-12 12:51:17,704 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 224 predicate places. [2024-05-12 12:51:17,704 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 348 transitions, 4433 flow [2024-05-12 12:51:17,704 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 12:51:17,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:17,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 12:51:17,705 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:17,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash 413307583, now seen corresponding path program 2 times [2024-05-12 12:51:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861595258] [2024-05-12 12:51:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:17,834 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 12:51:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861595258] [2024-05-12 12:51:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861595258] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:17,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:17,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419431801] [2024-05-12 12:51:17,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:17,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:17,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 348 transitions, 4433 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 12:51:17,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:17,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:17,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:19,332 INFO L124 PetriNetUnfolderBase]: 4978/8716 cut-off events. [2024-05-12 12:51:19,332 INFO L125 PetriNetUnfolderBase]: For 436978/437037 co-relation queries the response was YES. [2024-05-12 12:51:19,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53108 conditions, 8716 events. 4978/8716 cut-off events. For 436978/437037 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 66889 event pairs, 1631 based on Foata normal form. 11/8401 useless extension candidates. Maximal degree in co-relation 52976. Up to 7459 conditions per place. [2024-05-12 12:51:19,428 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 283 selfloop transitions, 66 changer transitions 0/365 dead transitions. [2024-05-12 12:51:19,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 365 transitions, 5241 flow [2024-05-12 12:51:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 12:51:19,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801749271137027 [2024-05-12 12:51:19,430 INFO L175 Difference]: Start difference. First operand has 277 places, 348 transitions, 4433 flow. Second operand 7 states and 199 transitions. [2024-05-12 12:51:19,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 365 transitions, 5241 flow [2024-05-12 12:51:20,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 365 transitions, 4937 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-05-12 12:51:20,630 INFO L231 Difference]: Finished difference. Result has 276 places, 351 transitions, 4347 flow [2024-05-12 12:51:20,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4347, PETRI_PLACES=276, PETRI_TRANSITIONS=351} [2024-05-12 12:51:20,631 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 223 predicate places. [2024-05-12 12:51:20,631 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 351 transitions, 4347 flow [2024-05-12 12:51:20,631 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 12:51:20,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:20,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 12:51:20,632 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:20,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2045446951, now seen corresponding path program 3 times [2024-05-12 12:51:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:20,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403523621] [2024-05-12 12:51:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:20,796 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 12:51:20,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:20,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403523621] [2024-05-12 12:51:20,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403523621] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:20,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:20,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927331106] [2024-05-12 12:51:20,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:20,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:20,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:20,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:20,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 351 transitions, 4347 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 12:51:20,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:20,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:20,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:22,361 INFO L124 PetriNetUnfolderBase]: 5020/8798 cut-off events. [2024-05-12 12:51:22,362 INFO L125 PetriNetUnfolderBase]: For 449432/449491 co-relation queries the response was YES. [2024-05-12 12:51:22,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53807 conditions, 8798 events. 5020/8798 cut-off events. For 449432/449491 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 67672 event pairs, 1649 based on Foata normal form. 11/8479 useless extension candidates. Maximal degree in co-relation 53675. Up to 7521 conditions per place. [2024-05-12 12:51:22,462 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 285 selfloop transitions, 67 changer transitions 0/368 dead transitions. [2024-05-12 12:51:22,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 368 transitions, 5167 flow [2024-05-12 12:51:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-05-12 12:51:22,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577259475218659 [2024-05-12 12:51:22,463 INFO L175 Difference]: Start difference. First operand has 276 places, 351 transitions, 4347 flow. Second operand 7 states and 198 transitions. [2024-05-12 12:51:22,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 368 transitions, 5167 flow [2024-05-12 12:51:23,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 368 transitions, 4971 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:23,996 INFO L231 Difference]: Finished difference. Result has 278 places, 354 transitions, 4377 flow [2024-05-12 12:51:23,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4377, PETRI_PLACES=278, PETRI_TRANSITIONS=354} [2024-05-12 12:51:23,997 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 225 predicate places. [2024-05-12 12:51:23,997 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 354 transitions, 4377 flow [2024-05-12 12:51:23,997 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 12:51:23,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:23,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 12:51:23,998 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:23,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash 964456659, now seen corresponding path program 4 times [2024-05-12 12:51:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:23,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455600656] [2024-05-12 12:51:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:23,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:24,132 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 12:51:24,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:24,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455600656] [2024-05-12 12:51:24,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455600656] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:24,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:24,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:24,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793160916] [2024-05-12 12:51:24,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:24,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:24,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:24,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:24,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:24,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:24,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 354 transitions, 4377 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 12:51:24,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:24,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:24,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:25,725 INFO L124 PetriNetUnfolderBase]: 5036/8851 cut-off events. [2024-05-12 12:51:25,725 INFO L125 PetriNetUnfolderBase]: For 451823/451882 co-relation queries the response was YES. [2024-05-12 12:51:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53879 conditions, 8851 events. 5036/8851 cut-off events. For 451823/451882 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 68321 event pairs, 1608 based on Foata normal form. 11/8536 useless extension candidates. Maximal degree in co-relation 53746. Up to 7419 conditions per place. [2024-05-12 12:51:25,820 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 282 selfloop transitions, 78 changer transitions 0/376 dead transitions. [2024-05-12 12:51:25,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 376 transitions, 5265 flow [2024-05-12 12:51:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:51:25,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860058309037901 [2024-05-12 12:51:25,822 INFO L175 Difference]: Start difference. First operand has 278 places, 354 transitions, 4377 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:51:25,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 376 transitions, 5265 flow [2024-05-12 12:51:27,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 376 transitions, 5061 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:27,306 INFO L231 Difference]: Finished difference. Result has 281 places, 359 transitions, 4481 flow [2024-05-12 12:51:27,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4173, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4481, PETRI_PLACES=281, PETRI_TRANSITIONS=359} [2024-05-12 12:51:27,306 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 228 predicate places. [2024-05-12 12:51:27,306 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 359 transitions, 4481 flow [2024-05-12 12:51:27,307 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 12:51:27,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:27,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:27,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 12:51:27,307 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:27,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:27,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1606293918, now seen corresponding path program 1 times [2024-05-12 12:51:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:27,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212792298] [2024-05-12 12:51:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:27,439 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 12:51:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:27,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212792298] [2024-05-12 12:51:27,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212792298] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:27,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:27,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512221110] [2024-05-12 12:51:27,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:27,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:27,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:27,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:27,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 359 transitions, 4481 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:27,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:27,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:27,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:29,174 INFO L124 PetriNetUnfolderBase]: 5109/9013 cut-off events. [2024-05-12 12:51:29,174 INFO L125 PetriNetUnfolderBase]: For 481583/481632 co-relation queries the response was YES. [2024-05-12 12:51:29,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56091 conditions, 9013 events. 5109/9013 cut-off events. For 481583/481632 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 69443 event pairs, 1355 based on Foata normal form. 6/8687 useless extension candidates. Maximal degree in co-relation 55956. Up to 7421 conditions per place. [2024-05-12 12:51:29,280 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 329 selfloop transitions, 51 changer transitions 0/396 dead transitions. [2024-05-12 12:51:29,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 396 transitions, 5919 flow [2024-05-12 12:51:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-05-12 12:51:29,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180758017492711 [2024-05-12 12:51:29,282 INFO L175 Difference]: Start difference. First operand has 281 places, 359 transitions, 4481 flow. Second operand 7 states and 212 transitions. [2024-05-12 12:51:29,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 396 transitions, 5919 flow [2024-05-12 12:51:30,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 396 transitions, 5737 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:30,742 INFO L231 Difference]: Finished difference. Result has 285 places, 365 transitions, 4656 flow [2024-05-12 12:51:30,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4656, PETRI_PLACES=285, PETRI_TRANSITIONS=365} [2024-05-12 12:51:30,743 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 232 predicate places. [2024-05-12 12:51:30,743 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 365 transitions, 4656 flow [2024-05-12 12:51:30,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:30,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:30,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:30,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 12:51:30,744 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:30,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1376977852, now seen corresponding path program 2 times [2024-05-12 12:51:30,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:30,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538147724] [2024-05-12 12:51:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:30,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:30,998 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 12:51:30,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538147724] [2024-05-12 12:51:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538147724] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:30,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:30,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883877102] [2024-05-12 12:51:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:31,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:31,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 365 transitions, 4656 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:31,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:31,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:31,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:32,764 INFO L124 PetriNetUnfolderBase]: 5156/9029 cut-off events. [2024-05-12 12:51:32,764 INFO L125 PetriNetUnfolderBase]: For 505696/505745 co-relation queries the response was YES. [2024-05-12 12:51:32,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57219 conditions, 9029 events. 5156/9029 cut-off events. For 505696/505745 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 69566 event pairs, 1334 based on Foata normal form. 6/8699 useless extension candidates. Maximal degree in co-relation 57082. Up to 7465 conditions per place. [2024-05-12 12:51:32,867 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 326 selfloop transitions, 55 changer transitions 0/397 dead transitions. [2024-05-12 12:51:32,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 397 transitions, 6018 flow [2024-05-12 12:51:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:51:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:51:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 12:51:32,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60932944606414 [2024-05-12 12:51:32,868 INFO L175 Difference]: Start difference. First operand has 285 places, 365 transitions, 4656 flow. Second operand 7 states and 209 transitions. [2024-05-12 12:51:32,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 397 transitions, 6018 flow [2024-05-12 12:51:34,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 397 transitions, 5801 flow, removed 89 selfloop flow, removed 2 redundant places. [2024-05-12 12:51:34,288 INFO L231 Difference]: Finished difference. Result has 290 places, 369 transitions, 4726 flow [2024-05-12 12:51:34,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4726, PETRI_PLACES=290, PETRI_TRANSITIONS=369} [2024-05-12 12:51:34,288 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 237 predicate places. [2024-05-12 12:51:34,288 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 369 transitions, 4726 flow [2024-05-12 12:51:34,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:34,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:34,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:34,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 12:51:34,289 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:34,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:34,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1604080896, now seen corresponding path program 3 times [2024-05-12 12:51:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:34,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791878864] [2024-05-12 12:51:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:34,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:34,414 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 12:51:34,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:34,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791878864] [2024-05-12 12:51:34,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791878864] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:34,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:34,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50948675] [2024-05-12 12:51:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:34,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:34,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:34,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 369 transitions, 4726 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:34,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:34,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:34,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:35,994 INFO L124 PetriNetUnfolderBase]: 5151/9070 cut-off events. [2024-05-12 12:51:35,994 INFO L125 PetriNetUnfolderBase]: For 496056/496105 co-relation queries the response was YES. [2024-05-12 12:51:36,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56539 conditions, 9070 events. 5151/9070 cut-off events. For 496056/496105 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 70315 event pairs, 1650 based on Foata normal form. 6/8729 useless extension candidates. Maximal degree in co-relation 56400. Up to 7671 conditions per place. [2024-05-12 12:51:36,100 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 335 selfloop transitions, 41 changer transitions 0/392 dead transitions. [2024-05-12 12:51:36,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 392 transitions, 5718 flow [2024-05-12 12:51:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:51:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:51:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 12:51:36,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-05-12 12:51:36,101 INFO L175 Difference]: Start difference. First operand has 290 places, 369 transitions, 4726 flow. Second operand 6 states and 181 transitions. [2024-05-12 12:51:36,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 392 transitions, 5718 flow [2024-05-12 12:51:37,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 392 transitions, 5534 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-05-12 12:51:37,988 INFO L231 Difference]: Finished difference. Result has 293 places, 369 transitions, 4629 flow [2024-05-12 12:51:37,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4629, PETRI_PLACES=293, PETRI_TRANSITIONS=369} [2024-05-12 12:51:37,991 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 240 predicate places. [2024-05-12 12:51:37,992 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 369 transitions, 4629 flow [2024-05-12 12:51:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:37,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:37,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 12:51:37,993 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:37,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1249403722, now seen corresponding path program 4 times [2024-05-12 12:51:37,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:37,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657023785] [2024-05-12 12:51:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:38,168 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 12:51:38,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:38,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657023785] [2024-05-12 12:51:38,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657023785] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:38,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:38,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508295100] [2024-05-12 12:51:38,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:38,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:38,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:38,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:38,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 369 transitions, 4629 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:38,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:38,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:38,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:39,947 INFO L124 PetriNetUnfolderBase]: 5172/9071 cut-off events. [2024-05-12 12:51:39,948 INFO L125 PetriNetUnfolderBase]: For 503151/503200 co-relation queries the response was YES. [2024-05-12 12:51:40,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56395 conditions, 9071 events. 5172/9071 cut-off events. For 503151/503200 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70201 event pairs, 1678 based on Foata normal form. 6/8731 useless extension candidates. Maximal degree in co-relation 56255. Up to 7769 conditions per place. [2024-05-12 12:51:40,062 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 330 selfloop transitions, 41 changer transitions 0/387 dead transitions. [2024-05-12 12:51:40,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 387 transitions, 5481 flow [2024-05-12 12:51:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:51:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:51:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 12:51:40,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-05-12 12:51:40,064 INFO L175 Difference]: Start difference. First operand has 293 places, 369 transitions, 4629 flow. Second operand 6 states and 176 transitions. [2024-05-12 12:51:40,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 387 transitions, 5481 flow [2024-05-12 12:51:41,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 387 transitions, 5374 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 12:51:41,827 INFO L231 Difference]: Finished difference. Result has 294 places, 371 transitions, 4681 flow [2024-05-12 12:51:41,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4528, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4681, PETRI_PLACES=294, PETRI_TRANSITIONS=371} [2024-05-12 12:51:41,828 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 241 predicate places. [2024-05-12 12:51:41,828 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 371 transitions, 4681 flow [2024-05-12 12:51:41,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:41,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:41,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:41,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 12:51:41,829 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:41,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash -202736424, now seen corresponding path program 5 times [2024-05-12 12:51:41,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:41,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494535597] [2024-05-12 12:51:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:41,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:41,947 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 12:51:41,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:41,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494535597] [2024-05-12 12:51:41,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494535597] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:41,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:41,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:41,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792905639] [2024-05-12 12:51:41,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:41,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:41,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:41,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:41,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:41,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:41,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 371 transitions, 4681 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:41,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:41,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:41,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:43,709 INFO L124 PetriNetUnfolderBase]: 5167/9063 cut-off events. [2024-05-12 12:51:43,710 INFO L125 PetriNetUnfolderBase]: For 502841/502894 co-relation queries the response was YES. [2024-05-12 12:51:43,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56133 conditions, 9063 events. 5167/9063 cut-off events. For 502841/502894 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70166 event pairs, 1674 based on Foata normal form. 10/8731 useless extension candidates. Maximal degree in co-relation 55992. Up to 7762 conditions per place. [2024-05-12 12:51:43,830 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 327 selfloop transitions, 46 changer transitions 0/389 dead transitions. [2024-05-12 12:51:43,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 389 transitions, 5473 flow [2024-05-12 12:51:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 12:51:43,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576530612244898 [2024-05-12 12:51:43,832 INFO L175 Difference]: Start difference. First operand has 294 places, 371 transitions, 4681 flow. Second operand 8 states and 226 transitions. [2024-05-12 12:51:43,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 389 transitions, 5473 flow [2024-05-12 12:51:45,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 389 transitions, 5296 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-05-12 12:51:45,420 INFO L231 Difference]: Finished difference. Result has 298 places, 371 transitions, 4601 flow [2024-05-12 12:51:45,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=298, PETRI_TRANSITIONS=371} [2024-05-12 12:51:45,420 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 245 predicate places. [2024-05-12 12:51:45,421 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 371 transitions, 4601 flow [2024-05-12 12:51:45,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:45,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:45,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:45,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 12:51:45,421 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:45,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:45,422 INFO L85 PathProgramCache]: Analyzing trace with hash 859028662, now seen corresponding path program 6 times [2024-05-12 12:51:45,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:45,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478180212] [2024-05-12 12:51:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:45,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:45,739 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 12:51:45,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:45,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478180212] [2024-05-12 12:51:45,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478180212] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:45,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:45,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:45,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234485710] [2024-05-12 12:51:45,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:45,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:45,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:45,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:45,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 371 transitions, 4601 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:45,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:45,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:45,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:47,283 INFO L124 PetriNetUnfolderBase]: 5162/9060 cut-off events. [2024-05-12 12:51:47,283 INFO L125 PetriNetUnfolderBase]: For 498080/498133 co-relation queries the response was YES. [2024-05-12 12:51:47,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55523 conditions, 9060 events. 5162/9060 cut-off events. For 498080/498133 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 70151 event pairs, 1664 based on Foata normal form. 10/8730 useless extension candidates. Maximal degree in co-relation 55381. Up to 7706 conditions per place. [2024-05-12 12:51:47,404 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 324 selfloop transitions, 52 changer transitions 0/392 dead transitions. [2024-05-12 12:51:47,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 392 transitions, 5409 flow [2024-05-12 12:51:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-05-12 12:51:47,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-05-12 12:51:47,407 INFO L175 Difference]: Start difference. First operand has 298 places, 371 transitions, 4601 flow. Second operand 8 states and 227 transitions. [2024-05-12 12:51:47,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 392 transitions, 5409 flow [2024-05-12 12:51:49,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 392 transitions, 5254 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-05-12 12:51:49,365 INFO L231 Difference]: Finished difference. Result has 299 places, 371 transitions, 4555 flow [2024-05-12 12:51:49,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4555, PETRI_PLACES=299, PETRI_TRANSITIONS=371} [2024-05-12 12:51:49,366 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 246 predicate places. [2024-05-12 12:51:49,366 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 371 transitions, 4555 flow [2024-05-12 12:51:49,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:49,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:49,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:49,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 12:51:49,367 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:49,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:49,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1254160362, now seen corresponding path program 1 times [2024-05-12 12:51:49,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:49,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486061351] [2024-05-12 12:51:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:49,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486061351] [2024-05-12 12:51:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486061351] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:49,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:49,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:51:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639486087] [2024-05-12 12:51:49,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 12:51:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 12:51:49,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 12:51:49,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:49,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 371 transitions, 4555 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:49,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:49,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:49,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:51,273 INFO L124 PetriNetUnfolderBase]: 5169/9074 cut-off events. [2024-05-12 12:51:51,273 INFO L125 PetriNetUnfolderBase]: For 500084/500131 co-relation queries the response was YES. [2024-05-12 12:51:51,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55506 conditions, 9074 events. 5169/9074 cut-off events. For 500084/500131 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70199 event pairs, 1659 based on Foata normal form. 3/8729 useless extension candidates. Maximal degree in co-relation 55363. Up to 7818 conditions per place. [2024-05-12 12:51:51,582 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 360 selfloop transitions, 28 changer transitions 0/404 dead transitions. [2024-05-12 12:51:51,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 404 transitions, 5473 flow [2024-05-12 12:51:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-05-12 12:51:51,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2024-05-12 12:51:51,583 INFO L175 Difference]: Start difference. First operand has 299 places, 371 transitions, 4555 flow. Second operand 8 states and 234 transitions. [2024-05-12 12:51:51,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 404 transitions, 5473 flow [2024-05-12 12:51:53,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 404 transitions, 5336 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 12:51:53,328 INFO L231 Difference]: Finished difference. Result has 299 places, 374 transitions, 4552 flow [2024-05-12 12:51:53,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4552, PETRI_PLACES=299, PETRI_TRANSITIONS=374} [2024-05-12 12:51:53,328 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 246 predicate places. [2024-05-12 12:51:53,328 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 374 transitions, 4552 flow [2024-05-12 12:51:53,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:51:53,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:53,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:53,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 12:51:53,329 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:53,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:53,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1315214970, now seen corresponding path program 2 times [2024-05-12 12:51:53,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:53,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614218254] [2024-05-12 12:51:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:53,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:51:53,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614218254] [2024-05-12 12:51:53,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614218254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:53,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:53,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478997761] [2024-05-12 12:51:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:53,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:53,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:53,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:53,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 374 transitions, 4552 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:53,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:53,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:53,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:55,154 INFO L124 PetriNetUnfolderBase]: 5186/9094 cut-off events. [2024-05-12 12:51:55,154 INFO L125 PetriNetUnfolderBase]: For 513411/513460 co-relation queries the response was YES. [2024-05-12 12:51:55,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55752 conditions, 9094 events. 5186/9094 cut-off events. For 513411/513460 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70382 event pairs, 1675 based on Foata normal form. 5/8747 useless extension candidates. Maximal degree in co-relation 55608. Up to 7703 conditions per place. [2024-05-12 12:51:55,258 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 295 selfloop transitions, 83 changer transitions 0/394 dead transitions. [2024-05-12 12:51:55,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 394 transitions, 5674 flow [2024-05-12 12:51:55,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:51:55,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:51:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 12:51:55,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-05-12 12:51:55,259 INFO L175 Difference]: Start difference. First operand has 299 places, 374 transitions, 4552 flow. Second operand 6 states and 179 transitions. [2024-05-12 12:51:55,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 394 transitions, 5674 flow [2024-05-12 12:51:57,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 394 transitions, 5588 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 12:51:57,229 INFO L231 Difference]: Finished difference. Result has 299 places, 380 transitions, 4793 flow [2024-05-12 12:51:57,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4793, PETRI_PLACES=299, PETRI_TRANSITIONS=380} [2024-05-12 12:51:57,230 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 246 predicate places. [2024-05-12 12:51:57,230 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 380 transitions, 4793 flow [2024-05-12 12:51:57,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:57,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:51:57,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:51:57,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 12:51:57,230 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:51:57,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:51:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -202731464, now seen corresponding path program 3 times [2024-05-12 12:51:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:51:57,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820527474] [2024-05-12 12:51:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:51:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:51:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:51:57,383 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 12:51:57,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:51:57,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820527474] [2024-05-12 12:51:57,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820527474] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:51:57,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:51:57,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:51:57,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378603630] [2024-05-12 12:51:57,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:51:57,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:51:57,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:51:57,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:51:57,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:51:57,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:51:57,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 380 transitions, 4793 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:51:57,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:51:57,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:51:57,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:51:59,229 INFO L124 PetriNetUnfolderBase]: 5183/9089 cut-off events. [2024-05-12 12:51:59,229 INFO L125 PetriNetUnfolderBase]: For 518731/518784 co-relation queries the response was YES. [2024-05-12 12:51:59,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55878 conditions, 9089 events. 5183/9089 cut-off events. For 518731/518784 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70321 event pairs, 1672 based on Foata normal form. 9/8750 useless extension candidates. Maximal degree in co-relation 55733. Up to 7700 conditions per place. [2024-05-12 12:51:59,348 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 290 selfloop transitions, 89 changer transitions 0/395 dead transitions. [2024-05-12 12:51:59,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 395 transitions, 5587 flow [2024-05-12 12:51:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:51:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:51:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-05-12 12:51:59,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-05-12 12:51:59,349 INFO L175 Difference]: Start difference. First operand has 299 places, 380 transitions, 4793 flow. Second operand 8 states and 228 transitions. [2024-05-12 12:51:59,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 395 transitions, 5587 flow [2024-05-12 12:52:01,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 395 transitions, 5487 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-05-12 12:52:01,663 INFO L231 Difference]: Finished difference. Result has 304 places, 380 transitions, 4882 flow [2024-05-12 12:52:01,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4882, PETRI_PLACES=304, PETRI_TRANSITIONS=380} [2024-05-12 12:52:01,665 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 251 predicate places. [2024-05-12 12:52:01,666 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 380 transitions, 4882 flow [2024-05-12 12:52:01,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:01,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:01,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:01,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 12:52:01,666 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:01,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1613616000, now seen corresponding path program 1 times [2024-05-12 12:52:01,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:01,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601732276] [2024-05-12 12:52:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:01,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:01,797 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 12:52:01,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:01,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601732276] [2024-05-12 12:52:01,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601732276] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:01,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:01,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:52:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54791480] [2024-05-12 12:52:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:01,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:52:01,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:52:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:52:01,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:52:01,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 380 transitions, 4882 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:01,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:01,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:52:01,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:03,516 INFO L124 PetriNetUnfolderBase]: 5200/9119 cut-off events. [2024-05-12 12:52:03,517 INFO L125 PetriNetUnfolderBase]: For 524206/524271 co-relation queries the response was YES. [2024-05-12 12:52:03,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56417 conditions, 9119 events. 5200/9119 cut-off events. For 524206/524271 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70599 event pairs, 1681 based on Foata normal form. 16/8783 useless extension candidates. Maximal degree in co-relation 56271. Up to 7739 conditions per place. [2024-05-12 12:52:03,632 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 302 selfloop transitions, 82 changer transitions 0/400 dead transitions. [2024-05-12 12:52:03,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 400 transitions, 5986 flow [2024-05-12 12:52:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:52:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:52:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 12:52:03,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-05-12 12:52:03,634 INFO L175 Difference]: Start difference. First operand has 304 places, 380 transitions, 4882 flow. Second operand 6 states and 179 transitions. [2024-05-12 12:52:03,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 400 transitions, 5986 flow [2024-05-12 12:52:06,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 400 transitions, 5669 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-05-12 12:52:06,406 INFO L231 Difference]: Finished difference. Result has 301 places, 386 transitions, 4860 flow [2024-05-12 12:52:06,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4860, PETRI_PLACES=301, PETRI_TRANSITIONS=386} [2024-05-12 12:52:06,421 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 248 predicate places. [2024-05-12 12:52:06,421 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 386 transitions, 4860 flow [2024-05-12 12:52:06,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:06,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:06,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:06,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 12:52:06,421 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:06,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash -202724520, now seen corresponding path program 2 times [2024-05-12 12:52:06,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:06,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638382805] [2024-05-12 12:52:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:06,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:06,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:06,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638382805] [2024-05-12 12:52:06,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638382805] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:06,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:06,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:52:06,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948730505] [2024-05-12 12:52:06,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:06,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:52:06,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:52:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:52:06,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:52:06,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 386 transitions, 4860 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:06,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:06,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:52:06,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:08,458 INFO L124 PetriNetUnfolderBase]: 5217/9143 cut-off events. [2024-05-12 12:52:08,458 INFO L125 PetriNetUnfolderBase]: For 528336/528393 co-relation queries the response was YES. [2024-05-12 12:52:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56708 conditions, 9143 events. 5217/9143 cut-off events. For 528336/528393 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70761 event pairs, 1675 based on Foata normal form. 13/8804 useless extension candidates. Maximal degree in co-relation 56563. Up to 7758 conditions per place. [2024-05-12 12:52:08,578 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 297 selfloop transitions, 96 changer transitions 0/409 dead transitions. [2024-05-12 12:52:08,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 409 transitions, 6190 flow [2024-05-12 12:52:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:52:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:52:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 12:52:08,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943877551020408 [2024-05-12 12:52:08,580 INFO L175 Difference]: Start difference. First operand has 301 places, 386 transitions, 4860 flow. Second operand 8 states and 233 transitions. [2024-05-12 12:52:08,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 409 transitions, 6190 flow [2024-05-12 12:52:11,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 409 transitions, 6102 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-05-12 12:52:11,257 INFO L231 Difference]: Finished difference. Result has 307 places, 392 transitions, 5099 flow [2024-05-12 12:52:11,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4784, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5099, PETRI_PLACES=307, PETRI_TRANSITIONS=392} [2024-05-12 12:52:11,258 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 254 predicate places. [2024-05-12 12:52:11,258 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 392 transitions, 5099 flow [2024-05-12 12:52:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:11,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:11,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:11,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 12:52:11,258 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:11,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1786344900, now seen corresponding path program 3 times [2024-05-12 12:52:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:11,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133783424] [2024-05-12 12:52:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:11,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133783424] [2024-05-12 12:52:11,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133783424] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:11,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:11,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:52:11,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608131016] [2024-05-12 12:52:11,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:11,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:52:11,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:52:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:52:11,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:52:11,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 392 transitions, 5099 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:11,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:11,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:52:11,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:12,970 INFO L124 PetriNetUnfolderBase]: 5214/9139 cut-off events. [2024-05-12 12:52:12,971 INFO L125 PetriNetUnfolderBase]: For 533093/533150 co-relation queries the response was YES. [2024-05-12 12:52:13,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56924 conditions, 9139 events. 5214/9139 cut-off events. For 533093/533150 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 70738 event pairs, 1675 based on Foata normal form. 13/8800 useless extension candidates. Maximal degree in co-relation 56777. Up to 7755 conditions per place. [2024-05-12 12:52:13,097 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 293 selfloop transitions, 100 changer transitions 0/409 dead transitions. [2024-05-12 12:52:13,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 409 transitions, 6117 flow [2024-05-12 12:52:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:52:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:52:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-05-12 12:52:13,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5759637188208617 [2024-05-12 12:52:13,099 INFO L175 Difference]: Start difference. First operand has 307 places, 392 transitions, 5099 flow. Second operand 9 states and 254 transitions. [2024-05-12 12:52:13,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 409 transitions, 6117 flow [2024-05-12 12:52:15,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 409 transitions, 5876 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-05-12 12:52:15,431 INFO L231 Difference]: Finished difference. Result has 310 places, 392 transitions, 5071 flow [2024-05-12 12:52:15,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5071, PETRI_PLACES=310, PETRI_TRANSITIONS=392} [2024-05-12 12:52:15,431 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 257 predicate places. [2024-05-12 12:52:15,432 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 392 transitions, 5071 flow [2024-05-12 12:52:15,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:15,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:15,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:15,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 12:52:15,432 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:15,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:15,433 INFO L85 PathProgramCache]: Analyzing trace with hash 335562498, now seen corresponding path program 1 times [2024-05-12 12:52:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:15,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774351433] [2024-05-12 12:52:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:15,553 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 12:52:15,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774351433] [2024-05-12 12:52:15,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774351433] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:15,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:15,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:52:15,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511697524] [2024-05-12 12:52:15,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:15,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:52:15,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:52:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:52:15,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:52:15,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 392 transitions, 5071 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:15,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:15,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:52:15,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:17,216 INFO L124 PetriNetUnfolderBase]: 5267/9324 cut-off events. [2024-05-12 12:52:17,216 INFO L125 PetriNetUnfolderBase]: For 557645/557709 co-relation queries the response was YES. [2024-05-12 12:52:17,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57482 conditions, 9324 events. 5267/9324 cut-off events. For 557645/557709 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 72731 event pairs, 1481 based on Foata normal form. 25/9002 useless extension candidates. Maximal degree in co-relation 57335. Up to 7315 conditions per place. [2024-05-12 12:52:17,555 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 371 selfloop transitions, 35 changer transitions 0/422 dead transitions. [2024-05-12 12:52:17,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 422 transitions, 6225 flow [2024-05-12 12:52:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:52:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:52:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 12:52:17,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-05-12 12:52:17,577 INFO L175 Difference]: Start difference. First operand has 310 places, 392 transitions, 5071 flow. Second operand 6 states and 183 transitions. [2024-05-12 12:52:17,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 422 transitions, 6225 flow [2024-05-12 12:52:19,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 422 transitions, 5997 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-05-12 12:52:19,672 INFO L231 Difference]: Finished difference. Result has 307 places, 393 transitions, 4939 flow [2024-05-12 12:52:19,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4845, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4939, PETRI_PLACES=307, PETRI_TRANSITIONS=393} [2024-05-12 12:52:19,673 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 254 predicate places. [2024-05-12 12:52:19,673 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 393 transitions, 4939 flow [2024-05-12 12:52:19,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:19,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:19,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:19,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 12:52:19,673 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:19,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash -194542566, now seen corresponding path program 2 times [2024-05-12 12:52:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:19,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756048107] [2024-05-12 12:52:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:19,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:19,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756048107] [2024-05-12 12:52:19,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756048107] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:19,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:19,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:52:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128809705] [2024-05-12 12:52:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:19,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:52:19,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:52:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:52:19,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:52:19,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 393 transitions, 4939 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:19,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:19,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:52:19,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:21,653 INFO L124 PetriNetUnfolderBase]: 5320/9358 cut-off events. [2024-05-12 12:52:21,653 INFO L125 PetriNetUnfolderBase]: For 559286/559340 co-relation queries the response was YES. [2024-05-12 12:52:21,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58032 conditions, 9358 events. 5320/9358 cut-off events. For 559286/559340 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 72910 event pairs, 1653 based on Foata normal form. 18/9031 useless extension candidates. Maximal degree in co-relation 57885. Up to 7849 conditions per place. [2024-05-12 12:52:21,765 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 365 selfloop transitions, 34 changer transitions 0/415 dead transitions. [2024-05-12 12:52:21,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 415 transitions, 5839 flow [2024-05-12 12:52:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:52:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:52:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 12:52:21,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-05-12 12:52:21,767 INFO L175 Difference]: Start difference. First operand has 307 places, 393 transitions, 4939 flow. Second operand 6 states and 180 transitions. [2024-05-12 12:52:21,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 415 transitions, 5839 flow [2024-05-12 12:52:24,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 415 transitions, 5774 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 12:52:24,203 INFO L231 Difference]: Finished difference. Result has 310 places, 394 transitions, 4970 flow [2024-05-12 12:52:24,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4970, PETRI_PLACES=310, PETRI_TRANSITIONS=394} [2024-05-12 12:52:24,203 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 257 predicate places. [2024-05-12 12:52:24,203 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 394 transitions, 4970 flow [2024-05-12 12:52:24,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:24,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:24,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:24,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 12:52:24,204 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:24,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:24,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1067011412, now seen corresponding path program 7 times [2024-05-12 12:52:24,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:24,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883478681] [2024-05-12 12:52:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:24,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883478681] [2024-05-12 12:52:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883478681] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:24,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:24,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:52:24,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492111328] [2024-05-12 12:52:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:52:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:52:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:52:24,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:52:24,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 394 transitions, 4970 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:24,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:24,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:52:24,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:26,142 INFO L124 PetriNetUnfolderBase]: 5341/9426 cut-off events. [2024-05-12 12:52:26,142 INFO L125 PetriNetUnfolderBase]: For 554586/554635 co-relation queries the response was YES. [2024-05-12 12:52:26,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58300 conditions, 9426 events. 5341/9426 cut-off events. For 554586/554635 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 73666 event pairs, 1687 based on Foata normal form. 6/9060 useless extension candidates. Maximal degree in co-relation 58152. Up to 7864 conditions per place. [2024-05-12 12:52:26,262 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 350 selfloop transitions, 59 changer transitions 0/425 dead transitions. [2024-05-12 12:52:26,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 425 transitions, 6230 flow [2024-05-12 12:52:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:52:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:52:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 12:52:26,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064139941690962 [2024-05-12 12:52:26,263 INFO L175 Difference]: Start difference. First operand has 310 places, 394 transitions, 4970 flow. Second operand 7 states and 208 transitions. [2024-05-12 12:52:26,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 425 transitions, 6230 flow [2024-05-12 12:52:28,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 425 transitions, 6148 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 12:52:28,576 INFO L231 Difference]: Finished difference. Result has 313 places, 398 transitions, 5192 flow [2024-05-12 12:52:28,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5192, PETRI_PLACES=313, PETRI_TRANSITIONS=398} [2024-05-12 12:52:28,577 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 260 predicate places. [2024-05-12 12:52:28,577 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 398 transitions, 5192 flow [2024-05-12 12:52:28,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:28,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:28,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:28,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 12:52:28,577 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:28,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:28,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1076534612, now seen corresponding path program 8 times [2024-05-12 12:52:28,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:28,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302111627] [2024-05-12 12:52:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:28,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:28,868 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 12:52:28,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:28,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302111627] [2024-05-12 12:52:28,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302111627] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:28,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:28,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:52:28,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724170797] [2024-05-12 12:52:28,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:28,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:52:28,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:28,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:52:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:52:28,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-05-12 12:52:28,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 398 transitions, 5192 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:52:28,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:28,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-05-12 12:52:28,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:30,571 INFO L124 PetriNetUnfolderBase]: 5362/9396 cut-off events. [2024-05-12 12:52:30,572 INFO L125 PetriNetUnfolderBase]: For 570335/570384 co-relation queries the response was YES. [2024-05-12 12:52:30,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58873 conditions, 9396 events. 5362/9396 cut-off events. For 570335/570384 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 73043 event pairs, 1732 based on Foata normal form. 6/9036 useless extension candidates. Maximal degree in co-relation 58724. Up to 8015 conditions per place. [2024-05-12 12:52:30,706 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 351 selfloop transitions, 53 changer transitions 0/420 dead transitions. [2024-05-12 12:52:30,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 420 transitions, 6144 flow [2024-05-12 12:52:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 12:52:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 12:52:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 12:52:30,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860058309037901 [2024-05-12 12:52:30,707 INFO L175 Difference]: Start difference. First operand has 313 places, 398 transitions, 5192 flow. Second operand 7 states and 201 transitions. [2024-05-12 12:52:30,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 420 transitions, 6144 flow