./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:30:05,706 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:30:05,792 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:30:05,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:30:05,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:30:05,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:30:05,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:30:05,838 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:30:05,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:30:05,842 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:30:05,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:30:05,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:30:05,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:30:05,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:30:05,845 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:30:05,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:30:05,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:30:05,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:30:05,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:30:05,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:30:05,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:30:05,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:30:05,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:30:05,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:30:05,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:30:05,848 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:30:05,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:30:05,849 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:30:05,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:30:05,850 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:30:05,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:30:05,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:30:05,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:30:05,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:30:05,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:30:05,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:30:05,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:30:05,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:30:05,852 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:30:05,852 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:30:05,853 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:30:05,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:30:05,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:30:05,853 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:30:06,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:30:06,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:30:06,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:30:06,157 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:30:06,158 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:30:06,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:30:07,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:30:07,613 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:30:07,614 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:30:07,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467470798/abe7c810950546bb9a6251c0670d3f6b/FLAGddad1898c [2024-06-28 02:30:07,644 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/467470798/abe7c810950546bb9a6251c0670d3f6b [2024-06-28 02:30:07,646 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:30:07,647 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:30:07,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 02:30:07,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:30:07,767 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:30:07,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:30:07,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:30:07,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:30:07,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:30:07" (1/2) ... [2024-06-28 02:30:07,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716da0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:30:07, skipping insertion in model container [2024-06-28 02:30:07,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:30:07" (1/2) ... [2024-06-28 02:30:07,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@109e9685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:30:07, skipping insertion in model container [2024-06-28 02:30:07,778 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:30:07" (2/2) ... [2024-06-28 02:30:07,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716da0ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:07, skipping insertion in model container [2024-06-28 02:30:07,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:30:07" (2/2) ... [2024-06-28 02:30:07,779 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:30:07,835 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:30:07,837 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 02:30:07,837 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 02:30:07,837 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 02:30:07,837 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] (((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-28 02:30:07,837 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:30:07,838 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-28 02:30:07,887 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:30:08,235 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:30:08,244 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:30:08,379 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:30:08,423 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:30:08,424 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08 WrapperNode [2024-06-28 02:30:08,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:30:08,426 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:30:08,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:30:08,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:30:08,434 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 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,465 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 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,505 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-28 02:30:08,507 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:30:08,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:30:08,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:30:08,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:30:08,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,533 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 02:30:08,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,537 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,545 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,547 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,549 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:30:08,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:30:08,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:30:08,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:30:08,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (1/1) ... [2024-06-28 02:30:08,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:30:08,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:30:08,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 02:30:08,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 02:30:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:30:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:30:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:30:08,626 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:30:08,626 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:30:08,626 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:30:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:30:08,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:30:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 02:30:08,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 02:30:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:30:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:30:08,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:30:08,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:30:08,629 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:30:08,782 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:30:08,785 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:30:09,021 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:30:09,022 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:30:09,114 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:30:09,115 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:30:09,115 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:30:09 BoogieIcfgContainer [2024-06-28 02:30:09,115 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:30:09,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:30:09,117 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:30:09,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:30:09,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:30:07" (1/4) ... [2024-06-28 02:30:09,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6779a7d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:30:09, skipping insertion in model container [2024-06-28 02:30:09,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:30:07" (2/4) ... [2024-06-28 02:30:09,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6779a7d1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:30:09, skipping insertion in model container [2024-06-28 02:30:09,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:30:08" (3/4) ... [2024-06-28 02:30:09,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6779a7d1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:30:09, skipping insertion in model container [2024-06-28 02:30:09,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:30:09" (4/4) ... [2024-06-28 02:30:09,147 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 02:30:09,164 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:30:09,164 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:30:09,164 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:30:09,228 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:30:09,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-28 02:30:09,304 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-28 02:30:09,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:30:09,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:30:09,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-28 02:30:09,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-28 02:30:09,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:30:09,335 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;@7e893bf8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:30:09,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 02:30:09,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:30:09,340 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:30:09,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:30:09,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:09,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:30:09,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:09,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 225172065, now seen corresponding path program 1 times [2024-06-28 02:30:09,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:09,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929521440] [2024-06-28 02:30:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:09,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:09,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:09,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929521440] [2024-06-28 02:30:09,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929521440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:09,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:09,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:30:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306795993] [2024-06-28 02:30:09,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:09,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:30:09,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:09,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:30:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:30:09,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-28 02:30:09,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:09,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:09,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-28 02:30:09,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:10,423 INFO L124 PetriNetUnfolderBase]: 2723/4049 cut-off events. [2024-06-28 02:30:10,424 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-28 02:30:10,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8049 conditions, 4049 events. 2723/4049 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22395 event pairs, 1898 based on Foata normal form. 1/3918 useless extension candidates. Maximal degree in co-relation 8036. Up to 3813 conditions per place. [2024-06-28 02:30:10,462 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 37 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-28 02:30:10,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 211 flow [2024-06-28 02:30:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:30:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:30:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-28 02:30:10,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2024-06-28 02:30:10,476 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 103 transitions. [2024-06-28 02:30:10,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 211 flow [2024-06-28 02:30:10,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 204 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:10,486 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-28 02:30:10,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-28 02:30:10,491 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-28 02:30:10,491 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-28 02:30:10,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:10,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:10,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:10,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:30:10,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:10,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash -623443094, now seen corresponding path program 1 times [2024-06-28 02:30:10,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:10,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525389874] [2024-06-28 02:30:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:10,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525389874] [2024-06-28 02:30:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525389874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:10,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:10,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:30:10,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491013666] [2024-06-28 02:30:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:10,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:30:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:30:10,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:30:10,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:10,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:10,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:10,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:10,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:11,275 INFO L124 PetriNetUnfolderBase]: 4385/6499 cut-off events. [2024-06-28 02:30:11,275 INFO L125 PetriNetUnfolderBase]: For 1123/1132 co-relation queries the response was YES. [2024-06-28 02:30:11,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 6499 events. 4385/6499 cut-off events. For 1123/1132 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36112 event pairs, 1932 based on Foata normal form. 11/6499 useless extension candidates. Maximal degree in co-relation 14753. Up to 5945 conditions per place. [2024-06-28 02:30:11,322 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 58 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-28 02:30:11,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 376 flow [2024-06-28 02:30:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:30:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:30:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-28 02:30:11,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989795918367347 [2024-06-28 02:30:11,329 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 137 transitions. [2024-06-28 02:30:11,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 376 flow [2024-06-28 02:30:11,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:30:11,338 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 222 flow [2024-06-28 02:30:11,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-28 02:30:11,340 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-28 02:30:11,341 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 222 flow [2024-06-28 02:30:11,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:11,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:11,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:11,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:30:11,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:11,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2128306583, now seen corresponding path program 1 times [2024-06-28 02:30:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:11,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804444766] [2024-06-28 02:30:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:11,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804444766] [2024-06-28 02:30:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804444766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:11,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:11,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:11,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87388005] [2024-06-28 02:30:11,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:11,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:11,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:11,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:11,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:11,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-28 02:30:11,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:11,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:11,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:12,305 INFO L124 PetriNetUnfolderBase]: 4527/6713 cut-off events. [2024-06-28 02:30:12,306 INFO L125 PetriNetUnfolderBase]: For 4346/4370 co-relation queries the response was YES. [2024-06-28 02:30:12,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18077 conditions, 6713 events. 4527/6713 cut-off events. For 4346/4370 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37507 event pairs, 1443 based on Foata normal form. 46/6748 useless extension candidates. Maximal degree in co-relation 18062. Up to 5937 conditions per place. [2024-06-28 02:30:12,363 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 68 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-28 02:30:12,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 506 flow [2024-06-28 02:30:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-28 02:30:12,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6816326530612244 [2024-06-28 02:30:12,366 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 222 flow. Second operand 5 states and 167 transitions. [2024-06-28 02:30:12,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 506 flow [2024-06-28 02:30:12,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 502 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 02:30:12,372 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 277 flow [2024-06-28 02:30:12,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-28 02:30:12,374 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-28 02:30:12,374 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 277 flow [2024-06-28 02:30:12,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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) [2024-06-28 02:30:12,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:12,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:12,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:30:12,375 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:12,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1404815442, now seen corresponding path program 1 times [2024-06-28 02:30:12,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:12,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54544399] [2024-06-28 02:30:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:12,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:12,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:12,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54544399] [2024-06-28 02:30:12,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54544399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:12,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:12,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:30:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85601873] [2024-06-28 02:30:12,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:12,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:30:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:30:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:30:12,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:12,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:12,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:12,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:12,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:13,093 INFO L124 PetriNetUnfolderBase]: 3542/5228 cut-off events. [2024-06-28 02:30:13,093 INFO L125 PetriNetUnfolderBase]: For 5883/5883 co-relation queries the response was YES. [2024-06-28 02:30:13,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15769 conditions, 5228 events. 3542/5228 cut-off events. For 5883/5883 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29056 event pairs, 1668 based on Foata normal form. 6/5225 useless extension candidates. Maximal degree in co-relation 15751. Up to 4874 conditions per place. [2024-06-28 02:30:13,131 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 52 selfloop transitions, 14 changer transitions 0/76 dead transitions. [2024-06-28 02:30:13,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 464 flow [2024-06-28 02:30:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:30:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:30:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-28 02:30:13,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-28 02:30:13,133 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 277 flow. Second operand 4 states and 131 transitions. [2024-06-28 02:30:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 464 flow [2024-06-28 02:30:13,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 429 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:13,138 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 306 flow [2024-06-28 02:30:13,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-28 02:30:13,139 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-28 02:30:13,139 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 306 flow [2024-06-28 02:30:13,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:13,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:13,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:13,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:30:13,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:13,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1006660495, now seen corresponding path program 1 times [2024-06-28 02:30:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:13,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050157841] [2024-06-28 02:30:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:13,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:13,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050157841] [2024-06-28 02:30:13,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050157841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:13,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:13,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:30:13,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708803892] [2024-06-28 02:30:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:13,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:30:13,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:30:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:30:13,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:13,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:13,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:13,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:13,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:13,817 INFO L124 PetriNetUnfolderBase]: 3655/5429 cut-off events. [2024-06-28 02:30:13,817 INFO L125 PetriNetUnfolderBase]: For 7448/7448 co-relation queries the response was YES. [2024-06-28 02:30:13,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16682 conditions, 5429 events. 3655/5429 cut-off events. For 7448/7448 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30247 event pairs, 1490 based on Foata normal form. 30/5450 useless extension candidates. Maximal degree in co-relation 16662. Up to 4863 conditions per place. [2024-06-28 02:30:13,853 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 63 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-28 02:30:13,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 560 flow [2024-06-28 02:30:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-28 02:30:13,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2024-06-28 02:30:13,859 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 306 flow. Second operand 5 states and 163 transitions. [2024-06-28 02:30:13,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 560 flow [2024-06-28 02:30:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 545 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 02:30:13,865 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 362 flow [2024-06-28 02:30:13,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-28 02:30:13,868 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-06-28 02:30:13,868 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 362 flow [2024-06-28 02:30:13,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:13,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:13,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:13,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:30:13,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:13,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash -957714512, now seen corresponding path program 1 times [2024-06-28 02:30:13,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:13,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560411315] [2024-06-28 02:30:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:13,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:13,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:13,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560411315] [2024-06-28 02:30:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560411315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:13,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:13,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:30:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614815188] [2024-06-28 02:30:14,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:14,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:30:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:14,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:30:14,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:30:14,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:14,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:14,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:14,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:14,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:14,680 INFO L124 PetriNetUnfolderBase]: 4565/6735 cut-off events. [2024-06-28 02:30:14,681 INFO L125 PetriNetUnfolderBase]: For 12227/12230 co-relation queries the response was YES. [2024-06-28 02:30:14,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21804 conditions, 6735 events. 4565/6735 cut-off events. For 12227/12230 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 37212 event pairs, 1849 based on Foata normal form. 5/6733 useless extension candidates. Maximal degree in co-relation 21782. Up to 6310 conditions per place. [2024-06-28 02:30:14,744 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 71 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-28 02:30:14,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 676 flow [2024-06-28 02:30:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:30:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:30:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-28 02:30:14,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 02:30:14,746 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 362 flow. Second operand 4 states and 126 transitions. [2024-06-28 02:30:14,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 676 flow [2024-06-28 02:30:14,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 631 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:14,765 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 450 flow [2024-06-28 02:30:14,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=450, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2024-06-28 02:30:14,768 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-28 02:30:14,769 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 450 flow [2024-06-28 02:30:14,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:14,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:14,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:14,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:30:14,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:14,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1112143450, now seen corresponding path program 1 times [2024-06-28 02:30:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:14,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716292926] [2024-06-28 02:30:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:14,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:14,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716292926] [2024-06-28 02:30:14,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716292926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:14,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:14,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:14,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167439497] [2024-06-28 02:30:14,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:14,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:14,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:14,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 450 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:14,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:14,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:14,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:15,490 INFO L124 PetriNetUnfolderBase]: 4606/6794 cut-off events. [2024-06-28 02:30:15,491 INFO L125 PetriNetUnfolderBase]: For 18135/18141 co-relation queries the response was YES. [2024-06-28 02:30:15,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24105 conditions, 6794 events. 4606/6794 cut-off events. For 18135/18141 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37884 event pairs, 1275 based on Foata normal form. 19/6800 useless extension candidates. Maximal degree in co-relation 24081. Up to 5615 conditions per place. [2024-06-28 02:30:15,548 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 83 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-28 02:30:15,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 811 flow [2024-06-28 02:30:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-28 02:30:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 02:30:15,550 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 450 flow. Second operand 5 states and 161 transitions. [2024-06-28 02:30:15,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 811 flow [2024-06-28 02:30:15,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 797 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-28 02:30:15,570 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 529 flow [2024-06-28 02:30:15,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-28 02:30:15,570 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2024-06-28 02:30:15,571 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 529 flow [2024-06-28 02:30:15,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:15,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:15,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:30:15,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:15,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1638247816, now seen corresponding path program 1 times [2024-06-28 02:30:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:15,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75461851] [2024-06-28 02:30:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:15,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:15,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75461851] [2024-06-28 02:30:15,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75461851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:15,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:15,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:15,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331038132] [2024-06-28 02:30:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:15,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:15,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:15,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:15,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 529 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:15,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:15,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:15,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:16,246 INFO L124 PetriNetUnfolderBase]: 4567/6763 cut-off events. [2024-06-28 02:30:16,246 INFO L125 PetriNetUnfolderBase]: For 22468/22474 co-relation queries the response was YES. [2024-06-28 02:30:16,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25083 conditions, 6763 events. 4567/6763 cut-off events. For 22468/22474 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37733 event pairs, 990 based on Foata normal form. 19/6769 useless extension candidates. Maximal degree in co-relation 25056. Up to 5597 conditions per place. [2024-06-28 02:30:16,303 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 80 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-28 02:30:16,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 802 flow [2024-06-28 02:30:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-28 02:30:16,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-28 02:30:16,305 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 529 flow. Second operand 5 states and 158 transitions. [2024-06-28 02:30:16,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 802 flow [2024-06-28 02:30:16,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 775 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 02:30:16,345 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 535 flow [2024-06-28 02:30:16,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-28 02:30:16,345 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-28 02:30:16,346 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 535 flow [2024-06-28 02:30:16,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:16,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:16,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:30:16,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:16,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1368154938, now seen corresponding path program 1 times [2024-06-28 02:30:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:16,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297331970] [2024-06-28 02:30:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:16,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:16,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297331970] [2024-06-28 02:30:16,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297331970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:16,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:16,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:30:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858093010] [2024-06-28 02:30:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:16,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:30:16,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:30:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:30:16,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:16,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:16,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:16,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:16,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:17,007 INFO L124 PetriNetUnfolderBase]: 4397/6624 cut-off events. [2024-06-28 02:30:17,007 INFO L125 PetriNetUnfolderBase]: For 25979/25988 co-relation queries the response was YES. [2024-06-28 02:30:17,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25249 conditions, 6624 events. 4397/6624 cut-off events. For 25979/25988 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 38108 event pairs, 1748 based on Foata normal form. 10/6621 useless extension candidates. Maximal degree in co-relation 25220. Up to 5898 conditions per place. [2024-06-28 02:30:17,069 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 73 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2024-06-28 02:30:17,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 983 flow [2024-06-28 02:30:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-28 02:30:17,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-28 02:30:17,071 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 535 flow. Second operand 5 states and 162 transitions. [2024-06-28 02:30:17,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 983 flow [2024-06-28 02:30:17,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 927 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:17,118 INFO L231 Difference]: Finished difference. Result has 77 places, 93 transitions, 698 flow [2024-06-28 02:30:17,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=698, PETRI_PLACES=77, PETRI_TRANSITIONS=93} [2024-06-28 02:30:17,119 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-28 02:30:17,119 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 93 transitions, 698 flow [2024-06-28 02:30:17,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:17,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:17,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:30:17,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1034294440, now seen corresponding path program 2 times [2024-06-28 02:30:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075020364] [2024-06-28 02:30:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:17,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:17,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075020364] [2024-06-28 02:30:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075020364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:17,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:30:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207178916] [2024-06-28 02:30:17,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:30:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:30:17,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:30:17,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:17,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 93 transitions, 698 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:17,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:17,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:17,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:17,826 INFO L124 PetriNetUnfolderBase]: 4452/6723 cut-off events. [2024-06-28 02:30:17,826 INFO L125 PetriNetUnfolderBase]: For 33232/33244 co-relation queries the response was YES. [2024-06-28 02:30:17,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 6723 events. 4452/6723 cut-off events. For 33232/33244 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 38647 event pairs, 1730 based on Foata normal form. 12/6729 useless extension candidates. Maximal degree in co-relation 27896. Up to 6020 conditions per place. [2024-06-28 02:30:17,895 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 88 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-28 02:30:17,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 1135 flow [2024-06-28 02:30:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-28 02:30:17,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-28 02:30:17,897 INFO L175 Difference]: Start difference. First operand has 77 places, 93 transitions, 698 flow. Second operand 5 states and 165 transitions. [2024-06-28 02:30:17,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 1135 flow [2024-06-28 02:30:17,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 131 transitions, 1103 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-28 02:30:17,967 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 869 flow [2024-06-28 02:30:17,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=869, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2024-06-28 02:30:17,967 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2024-06-28 02:30:17,968 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 869 flow [2024-06-28 02:30:17,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:17,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:17,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:17,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:30:17,969 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:17,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1566017158, now seen corresponding path program 1 times [2024-06-28 02:30:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:17,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922528749] [2024-06-28 02:30:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:18,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922528749] [2024-06-28 02:30:18,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922528749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:18,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:18,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:18,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219417879] [2024-06-28 02:30:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:18,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:18,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:18,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:18,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:18,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:18,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:18,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:18,761 INFO L124 PetriNetUnfolderBase]: 4700/6991 cut-off events. [2024-06-28 02:30:18,761 INFO L125 PetriNetUnfolderBase]: For 38876/38905 co-relation queries the response was YES. [2024-06-28 02:30:18,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29533 conditions, 6991 events. 4700/6991 cut-off events. For 38876/38905 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39520 event pairs, 1793 based on Foata normal form. 24/6997 useless extension candidates. Maximal degree in co-relation 29498. Up to 6271 conditions per place. [2024-06-28 02:30:18,808 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 83 selfloop transitions, 44 changer transitions 0/136 dead transitions. [2024-06-28 02:30:18,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1330 flow [2024-06-28 02:30:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-28 02:30:18,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-28 02:30:18,810 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 869 flow. Second operand 5 states and 162 transitions. [2024-06-28 02:30:18,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1330 flow [2024-06-28 02:30:18,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 1260 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:18,896 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 953 flow [2024-06-28 02:30:18,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=953, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2024-06-28 02:30:18,897 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-06-28 02:30:18,897 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 953 flow [2024-06-28 02:30:18,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:18,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:18,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:30:18,898 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:18,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2040553880, now seen corresponding path program 2 times [2024-06-28 02:30:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144895583] [2024-06-28 02:30:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:19,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144895583] [2024-06-28 02:30:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144895583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:19,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859491724] [2024-06-28 02:30:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:19,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:19,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:19,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:19,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:19,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:19,692 INFO L124 PetriNetUnfolderBase]: 4681/6980 cut-off events. [2024-06-28 02:30:19,692 INFO L125 PetriNetUnfolderBase]: For 37988/38008 co-relation queries the response was YES. [2024-06-28 02:30:19,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29398 conditions, 6980 events. 4681/6980 cut-off events. For 37988/38008 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39556 event pairs, 1744 based on Foata normal form. 18/6991 useless extension candidates. Maximal degree in co-relation 29363. Up to 6324 conditions per place. [2024-06-28 02:30:19,753 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 95 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2024-06-28 02:30:19,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1284 flow [2024-06-28 02:30:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-28 02:30:19,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 02:30:19,755 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 953 flow. Second operand 5 states and 161 transitions. [2024-06-28 02:30:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1284 flow [2024-06-28 02:30:19,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 1137 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:19,847 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 886 flow [2024-06-28 02:30:19,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=82, 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=5, PETRI_FLOW=886, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2024-06-28 02:30:19,848 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2024-06-28 02:30:19,848 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 886 flow [2024-06-28 02:30:19,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:19,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:19,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:19,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:30:19,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:19,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554221, now seen corresponding path program 1 times [2024-06-28 02:30:19,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:19,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342167729] [2024-06-28 02:30:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:19,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:19,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342167729] [2024-06-28 02:30:19,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342167729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:19,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:19,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:19,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012122524] [2024-06-28 02:30:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:19,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:19,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:20,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:20,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 886 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:20,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:20,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:20,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:20,558 INFO L124 PetriNetUnfolderBase]: 4740/7036 cut-off events. [2024-06-28 02:30:20,558 INFO L125 PetriNetUnfolderBase]: For 41737/41757 co-relation queries the response was YES. [2024-06-28 02:30:20,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30075 conditions, 7036 events. 4740/7036 cut-off events. For 41737/41757 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39474 event pairs, 1735 based on Foata normal form. 17/7046 useless extension candidates. Maximal degree in co-relation 30040. Up to 6483 conditions per place. [2024-06-28 02:30:20,599 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 94 selfloop transitions, 31 changer transitions 0/134 dead transitions. [2024-06-28 02:30:20,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 1293 flow [2024-06-28 02:30:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 02:30:20,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-28 02:30:20,600 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 886 flow. Second operand 5 states and 150 transitions. [2024-06-28 02:30:20,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 1293 flow [2024-06-28 02:30:20,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 134 transitions, 1231 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:20,663 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 1017 flow [2024-06-28 02:30:20,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1017, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-28 02:30:20,664 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-28 02:30:20,664 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 1017 flow [2024-06-28 02:30:20,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:20,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:20,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:20,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:30:20,665 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:20,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1998559149, now seen corresponding path program 2 times [2024-06-28 02:30:20,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:20,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463139902] [2024-06-28 02:30:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:20,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463139902] [2024-06-28 02:30:20,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463139902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:20,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:20,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:20,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192855217] [2024-06-28 02:30:20,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:20,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:20,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:20,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:20,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:20,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:20,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:20,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:20,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:20,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:21,383 INFO L124 PetriNetUnfolderBase]: 4754/7037 cut-off events. [2024-06-28 02:30:21,383 INFO L125 PetriNetUnfolderBase]: For 50596/50619 co-relation queries the response was YES. [2024-06-28 02:30:21,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32364 conditions, 7037 events. 4754/7037 cut-off events. For 50596/50619 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39284 event pairs, 1749 based on Foata normal form. 19/7043 useless extension candidates. Maximal degree in co-relation 32327. Up to 6463 conditions per place. [2024-06-28 02:30:21,422 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 42 changer transitions 0/152 dead transitions. [2024-06-28 02:30:21,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1547 flow [2024-06-28 02:30:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-28 02:30:21,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-28 02:30:21,423 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 1017 flow. Second operand 5 states and 154 transitions. [2024-06-28 02:30:21,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1547 flow [2024-06-28 02:30:21,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1504 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-28 02:30:21,490 INFO L231 Difference]: Finished difference. Result has 94 places, 131 transitions, 1242 flow [2024-06-28 02:30:21,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1242, PETRI_PLACES=94, PETRI_TRANSITIONS=131} [2024-06-28 02:30:21,491 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-06-28 02:30:21,491 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 131 transitions, 1242 flow [2024-06-28 02:30:21,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:21,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:21,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:21,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:30:21,492 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:21,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1825918293, now seen corresponding path program 1 times [2024-06-28 02:30:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:21,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262294940] [2024-06-28 02:30:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:21,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:21,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:21,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262294940] [2024-06-28 02:30:21,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262294940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:21,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:21,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:21,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674093795] [2024-06-28 02:30:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:21,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:21,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:21,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 131 transitions, 1242 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:21,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:21,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:21,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:22,198 INFO L124 PetriNetUnfolderBase]: 4802/7181 cut-off events. [2024-06-28 02:30:22,198 INFO L125 PetriNetUnfolderBase]: For 61748/61748 co-relation queries the response was YES. [2024-06-28 02:30:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35155 conditions, 7181 events. 4802/7181 cut-off events. For 61748/61748 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40606 event pairs, 1719 based on Foata normal form. 3/7175 useless extension candidates. Maximal degree in co-relation 35115. Up to 6525 conditions per place. [2024-06-28 02:30:22,247 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 149 selfloop transitions, 32 changer transitions 0/190 dead transitions. [2024-06-28 02:30:22,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 190 transitions, 2048 flow [2024-06-28 02:30:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 02:30:22,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-28 02:30:22,249 INFO L175 Difference]: Start difference. First operand has 94 places, 131 transitions, 1242 flow. Second operand 6 states and 186 transitions. [2024-06-28 02:30:22,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 190 transitions, 2048 flow [2024-06-28 02:30:22,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 190 transitions, 1968 flow, removed 40 selfloop flow, removed 0 redundant places. [2024-06-28 02:30:22,352 INFO L231 Difference]: Finished difference. Result has 102 places, 151 transitions, 1449 flow [2024-06-28 02:30:22,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1449, PETRI_PLACES=102, PETRI_TRANSITIONS=151} [2024-06-28 02:30:22,353 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-28 02:30:22,353 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 151 transitions, 1449 flow [2024-06-28 02:30:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:22,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:22,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:22,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:30:22,354 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:22,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:22,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1998565101, now seen corresponding path program 2 times [2024-06-28 02:30:22,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:22,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020241251] [2024-06-28 02:30:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:22,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:22,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020241251] [2024-06-28 02:30:22,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020241251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:22,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:22,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:22,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869913430] [2024-06-28 02:30:22,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:22,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:22,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 151 transitions, 1449 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:22,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:22,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:22,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:23,208 INFO L124 PetriNetUnfolderBase]: 4839/7240 cut-off events. [2024-06-28 02:30:23,208 INFO L125 PetriNetUnfolderBase]: For 67912/67921 co-relation queries the response was YES. [2024-06-28 02:30:23,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36369 conditions, 7240 events. 4839/7240 cut-off events. For 67912/67921 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 41079 event pairs, 1715 based on Foata normal form. 9/7242 useless extension candidates. Maximal degree in co-relation 36324. Up to 6597 conditions per place. [2024-06-28 02:30:23,264 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 158 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-06-28 02:30:23,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 202 transitions, 2222 flow [2024-06-28 02:30:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:30:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:30:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 02:30:23,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151603498542274 [2024-06-28 02:30:23,266 INFO L175 Difference]: Start difference. First operand has 102 places, 151 transitions, 1449 flow. Second operand 7 states and 211 transitions. [2024-06-28 02:30:23,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 202 transitions, 2222 flow [2024-06-28 02:30:23,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 202 transitions, 2134 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-28 02:30:23,360 INFO L231 Difference]: Finished difference. Result has 109 places, 163 transitions, 1590 flow [2024-06-28 02:30:23,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1590, PETRI_PLACES=109, PETRI_TRANSITIONS=163} [2024-06-28 02:30:23,360 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-28 02:30:23,361 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 163 transitions, 1590 flow [2024-06-28 02:30:23,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:23,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:23,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:23,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:30:23,361 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:23,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1998357711, now seen corresponding path program 3 times [2024-06-28 02:30:23,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:23,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029686697] [2024-06-28 02:30:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:23,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:23,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029686697] [2024-06-28 02:30:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029686697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:23,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:23,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224097620] [2024-06-28 02:30:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:23,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:23,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:23,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 163 transitions, 1590 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:23,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:23,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:23,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:24,246 INFO L124 PetriNetUnfolderBase]: 4831/7229 cut-off events. [2024-06-28 02:30:24,246 INFO L125 PetriNetUnfolderBase]: For 76855/76855 co-relation queries the response was YES. [2024-06-28 02:30:24,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37340 conditions, 7229 events. 4831/7229 cut-off events. For 76855/76855 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40938 event pairs, 1720 based on Foata normal form. 3/7223 useless extension candidates. Maximal degree in co-relation 37292. Up to 6591 conditions per place. [2024-06-28 02:30:24,309 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 152 selfloop transitions, 31 changer transitions 0/192 dead transitions. [2024-06-28 02:30:24,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 192 transitions, 2139 flow [2024-06-28 02:30:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-28 02:30:24,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6408163265306123 [2024-06-28 02:30:24,311 INFO L175 Difference]: Start difference. First operand has 109 places, 163 transitions, 1590 flow. Second operand 5 states and 157 transitions. [2024-06-28 02:30:24,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 192 transitions, 2139 flow [2024-06-28 02:30:24,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 192 transitions, 2049 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:24,478 INFO L231 Difference]: Finished difference. Result has 111 places, 163 transitions, 1573 flow [2024-06-28 02:30:24,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1573, PETRI_PLACES=111, PETRI_TRANSITIONS=163} [2024-06-28 02:30:24,479 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-28 02:30:24,479 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 163 transitions, 1573 flow [2024-06-28 02:30:24,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:24,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:24,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:24,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:30:24,480 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:24,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:24,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1998573037, now seen corresponding path program 1 times [2024-06-28 02:30:24,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:24,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484132315] [2024-06-28 02:30:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:24,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:24,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:24,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484132315] [2024-06-28 02:30:24,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484132315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:24,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:24,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:24,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065643401] [2024-06-28 02:30:24,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:24,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:24,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:24,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:24,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:24,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 163 transitions, 1573 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:24,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:24,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:24,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:25,418 INFO L124 PetriNetUnfolderBase]: 4881/7298 cut-off events. [2024-06-28 02:30:25,418 INFO L125 PetriNetUnfolderBase]: For 84365/84371 co-relation queries the response was YES. [2024-06-28 02:30:25,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38168 conditions, 7298 events. 4881/7298 cut-off events. For 84365/84371 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 41356 event pairs, 1709 based on Foata normal form. 16/7307 useless extension candidates. Maximal degree in co-relation 38118. Up to 6672 conditions per place. [2024-06-28 02:30:25,467 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 166 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-28 02:30:25,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 193 transitions, 2129 flow [2024-06-28 02:30:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 02:30:25,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-06-28 02:30:25,468 INFO L175 Difference]: Start difference. First operand has 111 places, 163 transitions, 1573 flow. Second operand 5 states and 153 transitions. [2024-06-28 02:30:25,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 193 transitions, 2129 flow [2024-06-28 02:30:25,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 193 transitions, 2067 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:25,590 INFO L231 Difference]: Finished difference. Result has 112 places, 166 transitions, 1606 flow [2024-06-28 02:30:25,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1606, PETRI_PLACES=112, PETRI_TRANSITIONS=166} [2024-06-28 02:30:25,590 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-28 02:30:25,591 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 166 transitions, 1606 flow [2024-06-28 02:30:25,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-06-28 02:30:25,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:25,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:25,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:30:25,591 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:25,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:25,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1997772327, now seen corresponding path program 1 times [2024-06-28 02:30:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:25,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374062197] [2024-06-28 02:30:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:25,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374062197] [2024-06-28 02:30:25,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374062197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:25,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:25,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:30:25,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583468331] [2024-06-28 02:30:25,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:25,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:30:25,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:30:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:30:25,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:25,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 166 transitions, 1606 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:25,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:25,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:25,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:26,221 INFO L124 PetriNetUnfolderBase]: 4603/6896 cut-off events. [2024-06-28 02:30:26,222 INFO L125 PetriNetUnfolderBase]: For 99668/99700 co-relation queries the response was YES. [2024-06-28 02:30:26,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6896 events. 4603/6896 cut-off events. For 99668/99700 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 39683 event pairs, 1625 based on Foata normal form. 8/6769 useless extension candidates. Maximal degree in co-relation 37899. Up to 6211 conditions per place. [2024-06-28 02:30:26,273 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2024-06-28 02:30:26,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 179 transitions, 1978 flow [2024-06-28 02:30:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:30:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:30:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-28 02:30:26,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-28 02:30:26,275 INFO L175 Difference]: Start difference. First operand has 112 places, 166 transitions, 1606 flow. Second operand 4 states and 122 transitions. [2024-06-28 02:30:26,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 179 transitions, 1978 flow [2024-06-28 02:30:26,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 179 transitions, 1915 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:26,423 INFO L231 Difference]: Finished difference. Result has 114 places, 168 transitions, 1625 flow [2024-06-28 02:30:26,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1625, PETRI_PLACES=114, PETRI_TRANSITIONS=168} [2024-06-28 02:30:26,424 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 62 predicate places. [2024-06-28 02:30:26,424 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 168 transitions, 1625 flow [2024-06-28 02:30:26,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:26,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:26,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:26,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:30:26,425 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:26,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:26,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1301890499, now seen corresponding path program 1 times [2024-06-28 02:30:26,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:26,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653509239] [2024-06-28 02:30:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:26,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653509239] [2024-06-28 02:30:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653509239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:26,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:26,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999166002] [2024-06-28 02:30:26,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:26,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:26,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 168 transitions, 1625 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:26,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:26,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:26,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:27,290 INFO L124 PetriNetUnfolderBase]: 5162/7712 cut-off events. [2024-06-28 02:30:27,291 INFO L125 PetriNetUnfolderBase]: For 104655/104678 co-relation queries the response was YES. [2024-06-28 02:30:27,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41852 conditions, 7712 events. 5162/7712 cut-off events. For 104655/104678 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44271 event pairs, 1717 based on Foata normal form. 22/7716 useless extension candidates. Maximal degree in co-relation 41799. Up to 6479 conditions per place. [2024-06-28 02:30:27,350 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 129 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-28 02:30:27,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 244 transitions, 2851 flow [2024-06-28 02:30:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:30:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:30:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-28 02:30:27,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-28 02:30:27,352 INFO L175 Difference]: Start difference. First operand has 114 places, 168 transitions, 1625 flow. Second operand 9 states and 278 transitions. [2024-06-28 02:30:27,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 244 transitions, 2851 flow [2024-06-28 02:30:27,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 244 transitions, 2833 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 02:30:27,517 INFO L231 Difference]: Finished difference. Result has 125 places, 193 transitions, 2171 flow [2024-06-28 02:30:27,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2171, PETRI_PLACES=125, PETRI_TRANSITIONS=193} [2024-06-28 02:30:27,517 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 73 predicate places. [2024-06-28 02:30:27,517 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 193 transitions, 2171 flow [2024-06-28 02:30:27,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:27,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:27,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:30:27,518 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:27,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1167338017, now seen corresponding path program 2 times [2024-06-28 02:30:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653050290] [2024-06-28 02:30:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:27,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653050290] [2024-06-28 02:30:27,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653050290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:27,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:27,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923413995] [2024-06-28 02:30:27,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:27,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:27,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:27,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:27,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 193 transitions, 2171 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:27,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:27,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:27,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:28,492 INFO L124 PetriNetUnfolderBase]: 5447/8161 cut-off events. [2024-06-28 02:30:28,492 INFO L125 PetriNetUnfolderBase]: For 128557/128577 co-relation queries the response was YES. [2024-06-28 02:30:28,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49027 conditions, 8161 events. 5447/8161 cut-off events. For 128557/128577 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 47199 event pairs, 1724 based on Foata normal form. 20/8174 useless extension candidates. Maximal degree in co-relation 48969. Up to 7040 conditions per place. [2024-06-28 02:30:28,560 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 182 selfloop transitions, 80 changer transitions 0/271 dead transitions. [2024-06-28 02:30:28,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 271 transitions, 3527 flow [2024-06-28 02:30:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:30:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:30:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-28 02:30:28,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-28 02:30:28,562 INFO L175 Difference]: Start difference. First operand has 125 places, 193 transitions, 2171 flow. Second operand 7 states and 226 transitions. [2024-06-28 02:30:28,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 271 transitions, 3527 flow [2024-06-28 02:30:28,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 271 transitions, 3295 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:28,829 INFO L231 Difference]: Finished difference. Result has 131 places, 222 transitions, 2621 flow [2024-06-28 02:30:28,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=131, PETRI_TRANSITIONS=222} [2024-06-28 02:30:28,829 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-28 02:30:28,829 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 222 transitions, 2621 flow [2024-06-28 02:30:28,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:28,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:28,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:28,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:30:28,830 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:28,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1167327787, now seen corresponding path program 3 times [2024-06-28 02:30:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:28,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259401025] [2024-06-28 02:30:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:28,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259401025] [2024-06-28 02:30:28,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259401025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:28,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:28,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:28,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560352675] [2024-06-28 02:30:28,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:28,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:28,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:28,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:29,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:29,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 222 transitions, 2621 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:29,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:29,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:29,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:29,816 INFO L124 PetriNetUnfolderBase]: 5480/8215 cut-off events. [2024-06-28 02:30:29,816 INFO L125 PetriNetUnfolderBase]: For 141917/141939 co-relation queries the response was YES. [2024-06-28 02:30:29,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51145 conditions, 8215 events. 5480/8215 cut-off events. For 141917/141939 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47640 event pairs, 1722 based on Foata normal form. 22/8230 useless extension candidates. Maximal degree in co-relation 51083. Up to 7078 conditions per place. [2024-06-28 02:30:29,883 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 174 selfloop transitions, 95 changer transitions 0/278 dead transitions. [2024-06-28 02:30:29,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 278 transitions, 3696 flow [2024-06-28 02:30:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:30:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:30:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-06-28 02:30:29,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2024-06-28 02:30:29,884 INFO L175 Difference]: Start difference. First operand has 131 places, 222 transitions, 2621 flow. Second operand 8 states and 246 transitions. [2024-06-28 02:30:29,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 278 transitions, 3696 flow [2024-06-28 02:30:30,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 278 transitions, 3579 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-28 02:30:30,214 INFO L231 Difference]: Finished difference. Result has 139 places, 236 transitions, 3013 flow [2024-06-28 02:30:30,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=139, PETRI_TRANSITIONS=236} [2024-06-28 02:30:30,215 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 87 predicate places. [2024-06-28 02:30:30,215 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 236 transitions, 3013 flow [2024-06-28 02:30:30,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:30,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:30,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:30,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:30:30,216 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:30,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1894796869, now seen corresponding path program 4 times [2024-06-28 02:30:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:30,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345335871] [2024-06-28 02:30:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:30,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345335871] [2024-06-28 02:30:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345335871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:30,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:30,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347857062] [2024-06-28 02:30:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:30,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:30,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 236 transitions, 3013 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:30,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:30,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:30,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:31,218 INFO L124 PetriNetUnfolderBase]: 5790/8677 cut-off events. [2024-06-28 02:30:31,218 INFO L125 PetriNetUnfolderBase]: For 164305/164327 co-relation queries the response was YES. [2024-06-28 02:30:31,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56001 conditions, 8677 events. 5790/8677 cut-off events. For 164305/164327 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50698 event pairs, 1726 based on Foata normal form. 22/8686 useless extension candidates. Maximal degree in co-relation 55935. Up to 7145 conditions per place. [2024-06-28 02:30:31,300 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 170 selfloop transitions, 148 changer transitions 0/327 dead transitions. [2024-06-28 02:30:31,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 327 transitions, 4621 flow [2024-06-28 02:30:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:30:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:30:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2024-06-28 02:30:31,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-28 02:30:31,303 INFO L175 Difference]: Start difference. First operand has 139 places, 236 transitions, 3013 flow. Second operand 9 states and 279 transitions. [2024-06-28 02:30:31,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 327 transitions, 4621 flow [2024-06-28 02:30:31,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 327 transitions, 4498 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:31,655 INFO L231 Difference]: Finished difference. Result has 147 places, 273 transitions, 3776 flow [2024-06-28 02:30:31,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2898, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3776, PETRI_PLACES=147, PETRI_TRANSITIONS=273} [2024-06-28 02:30:31,656 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-28 02:30:31,656 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 273 transitions, 3776 flow [2024-06-28 02:30:31,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:31,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:31,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:31,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:30:31,657 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:31,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash 766031489, now seen corresponding path program 1 times [2024-06-28 02:30:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950599086] [2024-06-28 02:30:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:31,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:31,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950599086] [2024-06-28 02:30:31,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950599086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:31,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:31,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243942100] [2024-06-28 02:30:31,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:31,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:31,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:31,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 273 transitions, 3776 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:31,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:31,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:31,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:32,843 INFO L124 PetriNetUnfolderBase]: 5928/8844 cut-off events. [2024-06-28 02:30:32,844 INFO L125 PetriNetUnfolderBase]: For 204726/204754 co-relation queries the response was YES. [2024-06-28 02:30:32,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62099 conditions, 8844 events. 5928/8844 cut-off events. For 204726/204754 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52071 event pairs, 1488 based on Foata normal form. 29/8840 useless extension candidates. Maximal degree in co-relation 62029. Up to 7108 conditions per place. [2024-06-28 02:30:32,920 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 229 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-28 02:30:32,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 321 transitions, 4898 flow [2024-06-28 02:30:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-28 02:30:32,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-28 02:30:32,922 INFO L175 Difference]: Start difference. First operand has 147 places, 273 transitions, 3776 flow. Second operand 6 states and 199 transitions. [2024-06-28 02:30:32,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 321 transitions, 4898 flow [2024-06-28 02:30:33,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 321 transitions, 4689 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-28 02:30:33,275 INFO L231 Difference]: Finished difference. Result has 150 places, 279 transitions, 3851 flow [2024-06-28 02:30:33,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3851, PETRI_PLACES=150, PETRI_TRANSITIONS=279} [2024-06-28 02:30:33,275 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-28 02:30:33,275 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 279 transitions, 3851 flow [2024-06-28 02:30:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:33,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:33,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:33,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:30:33,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:33,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash -91723291, now seen corresponding path program 2 times [2024-06-28 02:30:33,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:33,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599656903] [2024-06-28 02:30:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:33,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:33,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599656903] [2024-06-28 02:30:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599656903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:33,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:33,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167269930] [2024-06-28 02:30:33,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:33,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:33,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 279 transitions, 3851 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:33,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:33,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:33,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:34,490 INFO L124 PetriNetUnfolderBase]: 6071/9042 cut-off events. [2024-06-28 02:30:34,490 INFO L125 PetriNetUnfolderBase]: For 220392/220420 co-relation queries the response was YES. [2024-06-28 02:30:34,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64188 conditions, 9042 events. 6071/9042 cut-off events. For 220392/220420 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53310 event pairs, 1770 based on Foata normal form. 29/9038 useless extension candidates. Maximal degree in co-relation 64116. Up to 7781 conditions per place. [2024-06-28 02:30:34,585 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 226 selfloop transitions, 68 changer transitions 0/315 dead transitions. [2024-06-28 02:30:34,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 315 transitions, 4783 flow [2024-06-28 02:30:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-28 02:30:34,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-28 02:30:34,587 INFO L175 Difference]: Start difference. First operand has 150 places, 279 transitions, 3851 flow. Second operand 6 states and 191 transitions. [2024-06-28 02:30:34,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 315 transitions, 4783 flow [2024-06-28 02:30:35,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 315 transitions, 4635 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-28 02:30:35,022 INFO L231 Difference]: Finished difference. Result has 154 places, 282 transitions, 3921 flow [2024-06-28 02:30:35,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3921, PETRI_PLACES=154, PETRI_TRANSITIONS=282} [2024-06-28 02:30:35,023 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2024-06-28 02:30:35,023 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 282 transitions, 3921 flow [2024-06-28 02:30:35,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:35,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:35,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:35,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:30:35,024 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:35,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1819543111, now seen corresponding path program 3 times [2024-06-28 02:30:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764011497] [2024-06-28 02:30:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:35,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:35,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:35,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764011497] [2024-06-28 02:30:35,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764011497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:35,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:35,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:30:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370067448] [2024-06-28 02:30:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:35,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:30:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:30:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:30:35,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:35,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 282 transitions, 3921 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:35,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:35,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:35,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:36,161 INFO L124 PetriNetUnfolderBase]: 6145/9170 cut-off events. [2024-06-28 02:30:36,161 INFO L125 PetriNetUnfolderBase]: For 226356/226384 co-relation queries the response was YES. [2024-06-28 02:30:36,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64383 conditions, 9170 events. 6145/9170 cut-off events. For 226356/226384 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54289 event pairs, 1461 based on Foata normal form. 29/9179 useless extension candidates. Maximal degree in co-relation 64309. Up to 7743 conditions per place. [2024-06-28 02:30:36,260 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 246 selfloop transitions, 55 changer transitions 0/322 dead transitions. [2024-06-28 02:30:36,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 322 transitions, 4681 flow [2024-06-28 02:30:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-28 02:30:36,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 02:30:36,261 INFO L175 Difference]: Start difference. First operand has 154 places, 282 transitions, 3921 flow. Second operand 6 states and 196 transitions. [2024-06-28 02:30:36,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 322 transitions, 4681 flow [2024-06-28 02:30:36,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 322 transitions, 4525 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:36,631 INFO L231 Difference]: Finished difference. Result has 156 places, 284 transitions, 3941 flow [2024-06-28 02:30:36,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3941, PETRI_PLACES=156, PETRI_TRANSITIONS=284} [2024-06-28 02:30:36,631 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2024-06-28 02:30:36,631 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 284 transitions, 3941 flow [2024-06-28 02:30:36,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:36,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:36,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:36,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:30:36,632 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:36,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:36,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1703905575, now seen corresponding path program 1 times [2024-06-28 02:30:36,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:36,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700803880] [2024-06-28 02:30:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:36,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:36,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700803880] [2024-06-28 02:30:36,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700803880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:36,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:36,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:36,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822028456] [2024-06-28 02:30:36,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:36,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:36,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:36,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:36,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:36,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:36,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 284 transitions, 3941 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:36,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:36,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:36,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:37,930 INFO L124 PetriNetUnfolderBase]: 6303/9333 cut-off events. [2024-06-28 02:30:37,930 INFO L125 PetriNetUnfolderBase]: For 233579/233607 co-relation queries the response was YES. [2024-06-28 02:30:37,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65871 conditions, 9333 events. 6303/9333 cut-off events. For 233579/233607 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54700 event pairs, 1800 based on Foata normal form. 22/9336 useless extension candidates. Maximal degree in co-relation 65796. Up to 8365 conditions per place. [2024-06-28 02:30:38,014 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 243 selfloop transitions, 62 changer transitions 0/314 dead transitions. [2024-06-28 02:30:38,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 314 transitions, 4725 flow [2024-06-28 02:30:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 02:30:38,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-28 02:30:38,015 INFO L175 Difference]: Start difference. First operand has 156 places, 284 transitions, 3941 flow. Second operand 6 states and 185 transitions. [2024-06-28 02:30:38,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 314 transitions, 4725 flow [2024-06-28 02:30:38,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 314 transitions, 4593 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:38,416 INFO L231 Difference]: Finished difference. Result has 158 places, 284 transitions, 3942 flow [2024-06-28 02:30:38,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3942, PETRI_PLACES=158, PETRI_TRANSITIONS=284} [2024-06-28 02:30:38,416 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-28 02:30:38,417 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 284 transitions, 3942 flow [2024-06-28 02:30:38,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:38,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:38,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:38,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:30:38,417 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:38,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1037868265, now seen corresponding path program 1 times [2024-06-28 02:30:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:38,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982088538] [2024-06-28 02:30:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:38,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:38,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982088538] [2024-06-28 02:30:38,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982088538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:38,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:38,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:38,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269622104] [2024-06-28 02:30:38,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:38,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:38,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:38,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:38,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:38,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:38,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 284 transitions, 3942 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:38,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:38,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:38,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:39,596 INFO L124 PetriNetUnfolderBase]: 6570/9743 cut-off events. [2024-06-28 02:30:39,597 INFO L125 PetriNetUnfolderBase]: For 262301/262329 co-relation queries the response was YES. [2024-06-28 02:30:39,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69017 conditions, 9743 events. 6570/9743 cut-off events. For 262301/262329 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 57608 event pairs, 1497 based on Foata normal form. 40/9763 useless extension candidates. Maximal degree in co-relation 68941. Up to 8192 conditions per place. [2024-06-28 02:30:39,696 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 255 selfloop transitions, 69 changer transitions 0/333 dead transitions. [2024-06-28 02:30:39,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 333 transitions, 5074 flow [2024-06-28 02:30:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-28 02:30:39,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 02:30:39,697 INFO L175 Difference]: Start difference. First operand has 158 places, 284 transitions, 3942 flow. Second operand 6 states and 196 transitions. [2024-06-28 02:30:39,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 333 transitions, 5074 flow [2024-06-28 02:30:40,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 333 transitions, 4908 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:30:40,299 INFO L231 Difference]: Finished difference. Result has 159 places, 290 transitions, 4068 flow [2024-06-28 02:30:40,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4068, PETRI_PLACES=159, PETRI_TRANSITIONS=290} [2024-06-28 02:30:40,299 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-28 02:30:40,300 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 290 transitions, 4068 flow [2024-06-28 02:30:40,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:40,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:40,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:40,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:30:40,301 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:40,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:40,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1030249705, now seen corresponding path program 2 times [2024-06-28 02:30:40,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:40,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711184599] [2024-06-28 02:30:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:40,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:40,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:40,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711184599] [2024-06-28 02:30:40,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711184599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:40,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:40,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819342468] [2024-06-28 02:30:40,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:40,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:40,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:40,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 290 transitions, 4068 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:40,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:40,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:40,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:41,718 INFO L124 PetriNetUnfolderBase]: 6695/9918 cut-off events. [2024-06-28 02:30:41,718 INFO L125 PetriNetUnfolderBase]: For 286866/286894 co-relation queries the response was YES. [2024-06-28 02:30:41,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71866 conditions, 9918 events. 6695/9918 cut-off events. For 286866/286894 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 58755 event pairs, 1861 based on Foata normal form. 40/9938 useless extension candidates. Maximal degree in co-relation 71789. Up to 8803 conditions per place. [2024-06-28 02:30:41,831 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 253 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-28 02:30:41,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 327 transitions, 4988 flow [2024-06-28 02:30:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-28 02:30:41,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-28 02:30:41,832 INFO L175 Difference]: Start difference. First operand has 159 places, 290 transitions, 4068 flow. Second operand 6 states and 188 transitions. [2024-06-28 02:30:41,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 327 transitions, 4988 flow [2024-06-28 02:30:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 327 transitions, 4824 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-28 02:30:42,432 INFO L231 Difference]: Finished difference. Result has 163 places, 293 transitions, 4125 flow [2024-06-28 02:30:42,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4125, PETRI_PLACES=163, PETRI_TRANSITIONS=293} [2024-06-28 02:30:42,433 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-28 02:30:42,433 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 293 transitions, 4125 flow [2024-06-28 02:30:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:42,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:42,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:42,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:30:42,434 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:42,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1027102702, now seen corresponding path program 1 times [2024-06-28 02:30:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:42,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891571182] [2024-06-28 02:30:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:42,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891571182] [2024-06-28 02:30:42,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891571182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:42,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:42,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:42,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986263597] [2024-06-28 02:30:42,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:42,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:42,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:42,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 293 transitions, 4125 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:42,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:42,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:42,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:43,827 INFO L124 PetriNetUnfolderBase]: 6746/10012 cut-off events. [2024-06-28 02:30:43,827 INFO L125 PetriNetUnfolderBase]: For 286348/286360 co-relation queries the response was YES. [2024-06-28 02:30:43,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72052 conditions, 10012 events. 6746/10012 cut-off events. For 286348/286360 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59103 event pairs, 1815 based on Foata normal form. 11/10006 useless extension candidates. Maximal degree in co-relation 71973. Up to 8402 conditions per place. [2024-06-28 02:30:43,931 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 174 changer transitions 0/355 dead transitions. [2024-06-28 02:30:43,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 355 transitions, 5697 flow [2024-06-28 02:30:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:30:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:30:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-28 02:30:43,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-28 02:30:43,932 INFO L175 Difference]: Start difference. First operand has 163 places, 293 transitions, 4125 flow. Second operand 9 states and 278 transitions. [2024-06-28 02:30:43,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 355 transitions, 5697 flow [2024-06-28 02:30:44,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 355 transitions, 5538 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:44,775 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4623 flow [2024-06-28 02:30:44,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-28 02:30:44,776 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-28 02:30:44,776 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4623 flow [2024-06-28 02:30:44,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:44,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:44,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:44,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:30:44,777 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:44,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2091908333, now seen corresponding path program 2 times [2024-06-28 02:30:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:44,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463278624] [2024-06-28 02:30:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:44,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:44,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463278624] [2024-06-28 02:30:44,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463278624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:44,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:44,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:44,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194195335] [2024-06-28 02:30:44,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:44,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:44,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:44,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4623 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:44,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:44,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:44,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:46,123 INFO L124 PetriNetUnfolderBase]: 6739/9989 cut-off events. [2024-06-28 02:30:46,123 INFO L125 PetriNetUnfolderBase]: For 306710/306722 co-relation queries the response was YES. [2024-06-28 02:30:46,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73917 conditions, 9989 events. 6739/9989 cut-off events. For 306710/306722 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59150 event pairs, 1825 based on Foata normal form. 7/9980 useless extension candidates. Maximal degree in co-relation 73835. Up to 8972 conditions per place. [2024-06-28 02:30:46,238 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 257 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-28 02:30:46,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 331 transitions, 5331 flow [2024-06-28 02:30:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 02:30:46,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 02:30:46,239 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4623 flow. Second operand 6 states and 182 transitions. [2024-06-28 02:30:46,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 331 transitions, 5331 flow [2024-06-28 02:30:46,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 331 transitions, 4821 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-28 02:30:46,874 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4252 flow [2024-06-28 02:30:46,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4252, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-28 02:30:46,874 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-28 02:30:46,875 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4252 flow [2024-06-28 02:30:46,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:46,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:46,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:46,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:30:46,875 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:46,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1827418228, now seen corresponding path program 2 times [2024-06-28 02:30:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:46,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110219286] [2024-06-28 02:30:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110219286] [2024-06-28 02:30:46,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110219286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:46,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:46,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:46,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058049865] [2024-06-28 02:30:46,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:46,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:46,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:47,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:47,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4252 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:47,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:47,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:47,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:48,223 INFO L124 PetriNetUnfolderBase]: 6791/10103 cut-off events. [2024-06-28 02:30:48,223 INFO L125 PetriNetUnfolderBase]: For 312663/312685 co-relation queries the response was YES. [2024-06-28 02:30:48,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73678 conditions, 10103 events. 6791/10103 cut-off events. For 312663/312685 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59927 event pairs, 1786 based on Foata normal form. 22/10118 useless extension candidates. Maximal degree in co-relation 73595. Up to 8847 conditions per place. [2024-06-28 02:30:48,329 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 244 selfloop transitions, 101 changer transitions 0/354 dead transitions. [2024-06-28 02:30:48,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 354 transitions, 5471 flow [2024-06-28 02:30:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:30:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:30:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 247 transitions. [2024-06-28 02:30:48,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301020408163265 [2024-06-28 02:30:48,331 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4252 flow. Second operand 8 states and 247 transitions. [2024-06-28 02:30:48,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 354 transitions, 5471 flow [2024-06-28 02:30:49,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 354 transitions, 5243 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 02:30:49,130 INFO L231 Difference]: Finished difference. Result has 172 places, 312 transitions, 4379 flow [2024-06-28 02:30:49,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4379, PETRI_PLACES=172, PETRI_TRANSITIONS=312} [2024-06-28 02:30:49,130 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-28 02:30:49,130 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 312 transitions, 4379 flow [2024-06-28 02:30:49,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:49,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:30:49,131 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:49,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:49,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1811538478, now seen corresponding path program 3 times [2024-06-28 02:30:49,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:49,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372861750] [2024-06-28 02:30:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:49,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:49,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372861750] [2024-06-28 02:30:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372861750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:49,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:49,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:49,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158737246] [2024-06-28 02:30:49,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:49,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:49,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:49,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:49,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:49,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 312 transitions, 4379 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:49,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:49,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:49,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:50,399 INFO L124 PetriNetUnfolderBase]: 6770/10079 cut-off events. [2024-06-28 02:30:50,399 INFO L125 PetriNetUnfolderBase]: For 309382/309404 co-relation queries the response was YES. [2024-06-28 02:30:50,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73252 conditions, 10079 events. 6770/10079 cut-off events. For 309382/309404 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59868 event pairs, 1781 based on Foata normal form. 22/10094 useless extension candidates. Maximal degree in co-relation 73169. Up to 8831 conditions per place. [2024-06-28 02:30:50,504 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 248 selfloop transitions, 98 changer transitions 0/355 dead transitions. [2024-06-28 02:30:50,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 355 transitions, 5422 flow [2024-06-28 02:30:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:30:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:30:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-28 02:30:50,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559766763848397 [2024-06-28 02:30:50,505 INFO L175 Difference]: Start difference. First operand has 172 places, 312 transitions, 4379 flow. Second operand 7 states and 225 transitions. [2024-06-28 02:30:50,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 355 transitions, 5422 flow [2024-06-28 02:30:51,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 355 transitions, 5207 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 02:30:51,230 INFO L231 Difference]: Finished difference. Result has 173 places, 312 transitions, 4385 flow [2024-06-28 02:30:51,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4385, PETRI_PLACES=173, PETRI_TRANSITIONS=312} [2024-06-28 02:30:51,230 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-28 02:30:51,230 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 312 transitions, 4385 flow [2024-06-28 02:30:51,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:51,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:51,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:30:51,231 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:51,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1827748905, now seen corresponding path program 3 times [2024-06-28 02:30:51,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:51,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945143704] [2024-06-28 02:30:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:51,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:51,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945143704] [2024-06-28 02:30:51,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945143704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:51,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:51,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:51,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095763131] [2024-06-28 02:30:51,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:51,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:51,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:51,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:51,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 312 transitions, 4385 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:51,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:51,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:51,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:52,557 INFO L124 PetriNetUnfolderBase]: 6856/10183 cut-off events. [2024-06-28 02:30:52,558 INFO L125 PetriNetUnfolderBase]: For 321347/321369 co-relation queries the response was YES. [2024-06-28 02:30:52,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73850 conditions, 10183 events. 6856/10183 cut-off events. For 321347/321369 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 60702 event pairs, 1430 based on Foata normal form. 36/10212 useless extension candidates. Maximal degree in co-relation 73767. Up to 8883 conditions per place. [2024-06-28 02:30:52,863 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 288 selfloop transitions, 55 changer transitions 0/352 dead transitions. [2024-06-28 02:30:52,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 352 transitions, 5227 flow [2024-06-28 02:30:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:52,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-28 02:30:52,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-28 02:30:52,865 INFO L175 Difference]: Start difference. First operand has 173 places, 312 transitions, 4385 flow. Second operand 6 states and 193 transitions. [2024-06-28 02:30:52,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 352 transitions, 5227 flow [2024-06-28 02:30:53,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 352 transitions, 4960 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 02:30:53,482 INFO L231 Difference]: Finished difference. Result has 171 places, 314 transitions, 4292 flow [2024-06-28 02:30:53,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4292, PETRI_PLACES=171, PETRI_TRANSITIONS=314} [2024-06-28 02:30:53,482 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-28 02:30:53,482 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 314 transitions, 4292 flow [2024-06-28 02:30:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:53,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:53,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:30:53,483 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1827410292, now seen corresponding path program 1 times [2024-06-28 02:30:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:53,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776257448] [2024-06-28 02:30:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:53,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776257448] [2024-06-28 02:30:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776257448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:53,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:53,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:53,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43394424] [2024-06-28 02:30:53,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:53,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:53,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:53,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 314 transitions, 4292 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:53,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:53,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:53,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:54,978 INFO L124 PetriNetUnfolderBase]: 6945/10317 cut-off events. [2024-06-28 02:30:54,978 INFO L125 PetriNetUnfolderBase]: For 314655/314677 co-relation queries the response was YES. [2024-06-28 02:30:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74640 conditions, 10317 events. 6945/10317 cut-off events. For 314655/314677 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61246 event pairs, 1787 based on Foata normal form. 28/10338 useless extension candidates. Maximal degree in co-relation 74557. Up to 9347 conditions per place. [2024-06-28 02:30:55,280 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 294 selfloop transitions, 39 changer transitions 0/342 dead transitions. [2024-06-28 02:30:55,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 342 transitions, 5184 flow [2024-06-28 02:30:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:30:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:30:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 02:30:55,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-28 02:30:55,281 INFO L175 Difference]: Start difference. First operand has 171 places, 314 transitions, 4292 flow. Second operand 6 states and 179 transitions. [2024-06-28 02:30:55,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 342 transitions, 5184 flow [2024-06-28 02:30:55,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 342 transitions, 5056 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:55,864 INFO L231 Difference]: Finished difference. Result has 173 places, 317 transitions, 4334 flow [2024-06-28 02:30:55,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4334, PETRI_PLACES=173, PETRI_TRANSITIONS=317} [2024-06-28 02:30:55,865 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-28 02:30:55,865 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 317 transitions, 4334 flow [2024-06-28 02:30:55,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:55,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:55,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:55,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:30:55,865 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:55,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1528821840, now seen corresponding path program 1 times [2024-06-28 02:30:55,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:55,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010818913] [2024-06-28 02:30:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:55,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:55,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:55,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010818913] [2024-06-28 02:30:55,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010818913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:55,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:55,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:30:55,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875848217] [2024-06-28 02:30:55,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:55,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:30:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:55,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:30:55,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:30:55,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:30:55,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 317 transitions, 4334 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:55,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:55,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:30:55,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:57,478 INFO L124 PetriNetUnfolderBase]: 6600/9829 cut-off events. [2024-06-28 02:30:57,478 INFO L125 PetriNetUnfolderBase]: For 342021/342085 co-relation queries the response was YES. [2024-06-28 02:30:57,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73868 conditions, 9829 events. 6600/9829 cut-off events. For 342021/342085 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59017 event pairs, 1640 based on Foata normal form. 13/9638 useless extension candidates. Maximal degree in co-relation 73784. Up to 8827 conditions per place. [2024-06-28 02:30:57,565 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 273 selfloop transitions, 33 changer transitions 0/332 dead transitions. [2024-06-28 02:30:57,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 332 transitions, 4984 flow [2024-06-28 02:30:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:30:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:30:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 02:30:57,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-28 02:30:57,566 INFO L175 Difference]: Start difference. First operand has 173 places, 317 transitions, 4334 flow. Second operand 5 states and 150 transitions. [2024-06-28 02:30:57,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 332 transitions, 4984 flow [2024-06-28 02:30:58,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 332 transitions, 4856 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 02:30:58,141 INFO L231 Difference]: Finished difference. Result has 174 places, 317 transitions, 4290 flow [2024-06-28 02:30:58,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4290, PETRI_PLACES=174, PETRI_TRANSITIONS=317} [2024-06-28 02:30:58,141 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-28 02:30:58,141 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 317 transitions, 4290 flow [2024-06-28 02:30:58,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:58,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:30:58,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:30:58,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:30:58,142 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:30:58,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:30:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1451686352, now seen corresponding path program 4 times [2024-06-28 02:30:58,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:30:58,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880045414] [2024-06-28 02:30:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:30:58,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:30:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:30:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:30:58,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:30:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880045414] [2024-06-28 02:30:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880045414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:30:58,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:30:58,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:30:58,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116597065] [2024-06-28 02:30:58,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:30:58,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:30:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:30:58,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:30:58,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:30:58,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:30:58,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 317 transitions, 4290 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:30:58,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:30:58,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:30:58,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:30:59,799 INFO L124 PetriNetUnfolderBase]: 7008/10367 cut-off events. [2024-06-28 02:30:59,800 INFO L125 PetriNetUnfolderBase]: For 342363/342369 co-relation queries the response was YES. [2024-06-28 02:30:59,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75993 conditions, 10367 events. 7008/10367 cut-off events. For 342363/342369 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61143 event pairs, 1924 based on Foata normal form. 4/10336 useless extension candidates. Maximal degree in co-relation 75908. Up to 8445 conditions per place. [2024-06-28 02:31:00,039 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 213 changer transitions 0/394 dead transitions. [2024-06-28 02:31:00,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 394 transitions, 6179 flow [2024-06-28 02:31:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:31:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:31:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 02:31:00,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501457725947521 [2024-06-28 02:31:00,040 INFO L175 Difference]: Start difference. First operand has 174 places, 317 transitions, 4290 flow. Second operand 7 states and 223 transitions. [2024-06-28 02:31:00,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 394 transitions, 6179 flow [2024-06-28 02:31:00,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 394 transitions, 6095 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 02:31:00,594 INFO L231 Difference]: Finished difference. Result has 179 places, 352 transitions, 5392 flow [2024-06-28 02:31:00,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5392, PETRI_PLACES=179, PETRI_TRANSITIONS=352} [2024-06-28 02:31:00,595 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 127 predicate places. [2024-06-28 02:31:00,595 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 352 transitions, 5392 flow [2024-06-28 02:31:00,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:00,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:00,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:00,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:31:00,596 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:00,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:00,596 INFO L85 PathProgramCache]: Analyzing trace with hash 571016720, now seen corresponding path program 5 times [2024-06-28 02:31:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:00,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017925993] [2024-06-28 02:31:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:00,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:00,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017925993] [2024-06-28 02:31:00,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017925993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:00,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:00,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:00,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252662135] [2024-06-28 02:31:00,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:00,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:00,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:00,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:00,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 352 transitions, 5392 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:00,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:00,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:00,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:02,543 INFO L124 PetriNetUnfolderBase]: 7000/10386 cut-off events. [2024-06-28 02:31:02,543 INFO L125 PetriNetUnfolderBase]: For 366779/366801 co-relation queries the response was YES. [2024-06-28 02:31:02,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81362 conditions, 10386 events. 7000/10386 cut-off events. For 366779/366801 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 61786 event pairs, 1790 based on Foata normal form. 19/10398 useless extension candidates. Maximal degree in co-relation 81274. Up to 9378 conditions per place. [2024-06-28 02:31:02,647 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 325 selfloop transitions, 63 changer transitions 0/397 dead transitions. [2024-06-28 02:31:02,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 6422 flow [2024-06-28 02:31:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:31:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:31:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-28 02:31:02,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147959183673469 [2024-06-28 02:31:02,649 INFO L175 Difference]: Start difference. First operand has 179 places, 352 transitions, 5392 flow. Second operand 8 states and 241 transitions. [2024-06-28 02:31:02,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 6422 flow [2024-06-28 02:31:03,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 397 transitions, 6238 flow, removed 92 selfloop flow, removed 0 redundant places. [2024-06-28 02:31:03,664 INFO L231 Difference]: Finished difference. Result has 188 places, 357 transitions, 5446 flow [2024-06-28 02:31:03,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=188, PETRI_TRANSITIONS=357} [2024-06-28 02:31:03,665 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-28 02:31:03,665 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 357 transitions, 5446 flow [2024-06-28 02:31:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:03,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:03,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:03,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:31:03,665 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:03,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:03,665 INFO L85 PathProgramCache]: Analyzing trace with hash 770704460, now seen corresponding path program 6 times [2024-06-28 02:31:03,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:03,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872737248] [2024-06-28 02:31:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:03,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:03,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:03,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872737248] [2024-06-28 02:31:03,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872737248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:03,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:03,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:03,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139662372] [2024-06-28 02:31:03,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:03,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:03,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:03,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:03,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:03,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:03,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 357 transitions, 5446 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:03,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:03,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:03,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:05,362 INFO L124 PetriNetUnfolderBase]: 7079/10512 cut-off events. [2024-06-28 02:31:05,362 INFO L125 PetriNetUnfolderBase]: For 370125/370147 co-relation queries the response was YES. [2024-06-28 02:31:05,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81543 conditions, 10512 events. 7079/10512 cut-off events. For 370125/370147 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 62470 event pairs, 1782 based on Foata normal form. 19/10518 useless extension candidates. Maximal degree in co-relation 81451. Up to 8881 conditions per place. [2024-06-28 02:31:05,493 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 229 selfloop transitions, 181 changer transitions 0/419 dead transitions. [2024-06-28 02:31:05,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 419 transitions, 7112 flow [2024-06-28 02:31:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:31:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:31:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-28 02:31:05,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454081632653061 [2024-06-28 02:31:05,495 INFO L175 Difference]: Start difference. First operand has 188 places, 357 transitions, 5446 flow. Second operand 8 states and 253 transitions. [2024-06-28 02:31:05,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 419 transitions, 7112 flow [2024-06-28 02:31:06,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 419 transitions, 6914 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 02:31:06,464 INFO L231 Difference]: Finished difference. Result has 194 places, 373 transitions, 5940 flow [2024-06-28 02:31:06,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5940, PETRI_PLACES=194, PETRI_TRANSITIONS=373} [2024-06-28 02:31:06,465 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-06-28 02:31:06,465 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 373 transitions, 5940 flow [2024-06-28 02:31:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:06,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:31:06,466 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:06,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1019570718, now seen corresponding path program 7 times [2024-06-28 02:31:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815701490] [2024-06-28 02:31:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:06,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:06,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815701490] [2024-06-28 02:31:06,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815701490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:06,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:06,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:06,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600663589] [2024-06-28 02:31:06,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:06,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:06,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:06,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:06,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:06,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 373 transitions, 5940 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:06,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:06,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:06,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:08,282 INFO L124 PetriNetUnfolderBase]: 7057/10484 cut-off events. [2024-06-28 02:31:08,282 INFO L125 PetriNetUnfolderBase]: For 389286/389308 co-relation queries the response was YES. [2024-06-28 02:31:08,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82959 conditions, 10484 events. 7057/10484 cut-off events. For 389286/389308 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62380 event pairs, 1782 based on Foata normal form. 22/10493 useless extension candidates. Maximal degree in co-relation 82864. Up to 8864 conditions per place. [2024-06-28 02:31:08,384 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 237 selfloop transitions, 177 changer transitions 0/423 dead transitions. [2024-06-28 02:31:08,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 423 transitions, 7424 flow [2024-06-28 02:31:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:31:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:31:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-28 02:31:08,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-28 02:31:08,385 INFO L175 Difference]: Start difference. First operand has 194 places, 373 transitions, 5940 flow. Second operand 9 states and 280 transitions. [2024-06-28 02:31:08,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 423 transitions, 7424 flow [2024-06-28 02:31:09,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 423 transitions, 7118 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 02:31:09,192 INFO L231 Difference]: Finished difference. Result has 199 places, 373 transitions, 6000 flow [2024-06-28 02:31:09,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6000, PETRI_PLACES=199, PETRI_TRANSITIONS=373} [2024-06-28 02:31:09,192 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 147 predicate places. [2024-06-28 02:31:09,192 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 373 transitions, 6000 flow [2024-06-28 02:31:09,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:09,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:09,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:09,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:31:09,193 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:09,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1148724974, now seen corresponding path program 8 times [2024-06-28 02:31:09,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:09,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224797406] [2024-06-28 02:31:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:09,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:09,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224797406] [2024-06-28 02:31:09,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224797406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:09,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:09,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:09,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005816187] [2024-06-28 02:31:09,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:09,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:09,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:09,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:09,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:09,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:09,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 373 transitions, 6000 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:09,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:09,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:09,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:11,085 INFO L124 PetriNetUnfolderBase]: 7044/10466 cut-off events. [2024-06-28 02:31:11,085 INFO L125 PetriNetUnfolderBase]: For 403391/403407 co-relation queries the response was YES. [2024-06-28 02:31:11,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 10466 events. 7044/10466 cut-off events. For 403391/403407 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62222 event pairs, 1800 based on Foata normal form. 15/10467 useless extension candidates. Maximal degree in co-relation 83260. Up to 8854 conditions per place. [2024-06-28 02:31:11,194 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 231 selfloop transitions, 177 changer transitions 0/417 dead transitions. [2024-06-28 02:31:11,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 417 transitions, 7351 flow [2024-06-28 02:31:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:31:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:31:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-28 02:31:11,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-28 02:31:11,195 INFO L175 Difference]: Start difference. First operand has 199 places, 373 transitions, 6000 flow. Second operand 7 states and 226 transitions. [2024-06-28 02:31:11,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 417 transitions, 7351 flow [2024-06-28 02:31:11,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 417 transitions, 7044 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:31:11,989 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 6295 flow [2024-06-28 02:31:11,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6295, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-06-28 02:31:11,990 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2024-06-28 02:31:11,990 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 6295 flow [2024-06-28 02:31:11,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:11,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:11,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:11,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:31:11,991 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:11,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1390826468, now seen corresponding path program 2 times [2024-06-28 02:31:11,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:11,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849985673] [2024-06-28 02:31:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:12,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:12,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849985673] [2024-06-28 02:31:12,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849985673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:12,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:12,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:12,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845275200] [2024-06-28 02:31:12,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:12,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:12,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:12,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:12,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 6295 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:12,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:12,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:12,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:14,021 INFO L124 PetriNetUnfolderBase]: 7115/10563 cut-off events. [2024-06-28 02:31:14,021 INFO L125 PetriNetUnfolderBase]: For 433050/433072 co-relation queries the response was YES. [2024-06-28 02:31:14,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85775 conditions, 10563 events. 7115/10563 cut-off events. For 433050/433072 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 62775 event pairs, 1803 based on Foata normal form. 28/10578 useless extension candidates. Maximal degree in co-relation 85676. Up to 9601 conditions per place. [2024-06-28 02:31:14,135 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 45 changer transitions 0/408 dead transitions. [2024-06-28 02:31:14,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 408 transitions, 7423 flow [2024-06-28 02:31:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:31:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:31:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 02:31:14,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 02:31:14,136 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 6295 flow. Second operand 6 states and 182 transitions. [2024-06-28 02:31:14,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 408 transitions, 7423 flow [2024-06-28 02:31:15,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 408 transitions, 7182 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 02:31:15,245 INFO L231 Difference]: Finished difference. Result has 205 places, 379 transitions, 6237 flow [2024-06-28 02:31:15,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6237, PETRI_PLACES=205, PETRI_TRANSITIONS=379} [2024-06-28 02:31:15,246 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 153 predicate places. [2024-06-28 02:31:15,246 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 379 transitions, 6237 flow [2024-06-28 02:31:15,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:15,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:15,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:15,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:31:15,247 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:15,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 778330956, now seen corresponding path program 3 times [2024-06-28 02:31:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583237023] [2024-06-28 02:31:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:15,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583237023] [2024-06-28 02:31:15,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583237023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:15,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:15,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:15,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228341201] [2024-06-28 02:31:15,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:15,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:15,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:15,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 379 transitions, 6237 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:15,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:15,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:15,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:17,045 INFO L124 PetriNetUnfolderBase]: 7217/10701 cut-off events. [2024-06-28 02:31:17,045 INFO L125 PetriNetUnfolderBase]: For 460262/460284 co-relation queries the response was YES. [2024-06-28 02:31:17,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87315 conditions, 10701 events. 7217/10701 cut-off events. For 460262/460284 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 63565 event pairs, 1784 based on Foata normal form. 28/10716 useless extension candidates. Maximal degree in co-relation 87215. Up to 9520 conditions per place. [2024-06-28 02:31:17,163 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 55 changer transitions 0/418 dead transitions. [2024-06-28 02:31:17,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 418 transitions, 7547 flow [2024-06-28 02:31:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:31:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:31:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 02:31:17,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-28 02:31:17,164 INFO L175 Difference]: Start difference. First operand has 205 places, 379 transitions, 6237 flow. Second operand 6 states and 186 transitions. [2024-06-28 02:31:17,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 418 transitions, 7547 flow [2024-06-28 02:31:18,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 418 transitions, 7280 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 02:31:18,424 INFO L231 Difference]: Finished difference. Result has 206 places, 384 transitions, 6222 flow [2024-06-28 02:31:18,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6222, PETRI_PLACES=206, PETRI_TRANSITIONS=384} [2024-06-28 02:31:18,425 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-28 02:31:18,425 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 384 transitions, 6222 flow [2024-06-28 02:31:18,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:18,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:18,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:18,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:31:18,426 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:18,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash -8798344, now seen corresponding path program 2 times [2024-06-28 02:31:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:18,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477474053] [2024-06-28 02:31:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:18,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:18,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477474053] [2024-06-28 02:31:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477474053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:18,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:18,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:31:18,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315565966] [2024-06-28 02:31:18,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:18,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:31:18,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:18,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:31:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:31:18,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-28 02:31:18,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 384 transitions, 6222 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:18,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:18,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-28 02:31:18,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:20,018 INFO L124 PetriNetUnfolderBase]: 6909/10262 cut-off events. [2024-06-28 02:31:20,018 INFO L125 PetriNetUnfolderBase]: For 499309/499373 co-relation queries the response was YES. [2024-06-28 02:31:20,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86576 conditions, 10262 events. 6909/10262 cut-off events. For 499309/499373 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61717 event pairs, 1686 based on Foata normal form. 13/10067 useless extension candidates. Maximal degree in co-relation 86476. Up to 9206 conditions per place. [2024-06-28 02:31:20,135 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 327 selfloop transitions, 48 changer transitions 0/402 dead transitions. [2024-06-28 02:31:20,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 402 transitions, 7233 flow [2024-06-28 02:31:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:31:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:31:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 02:31:20,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-28 02:31:20,136 INFO L175 Difference]: Start difference. First operand has 206 places, 384 transitions, 6222 flow. Second operand 5 states and 150 transitions. [2024-06-28 02:31:20,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 402 transitions, 7233 flow [2024-06-28 02:31:21,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 402 transitions, 7106 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-28 02:31:21,224 INFO L231 Difference]: Finished difference. Result has 209 places, 388 transitions, 6274 flow [2024-06-28 02:31:21,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6274, PETRI_PLACES=209, PETRI_TRANSITIONS=388} [2024-06-28 02:31:21,225 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 157 predicate places. [2024-06-28 02:31:21,225 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 388 transitions, 6274 flow [2024-06-28 02:31:21,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:21,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:21,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:31:21,226 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:21,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2022826474, now seen corresponding path program 1 times [2024-06-28 02:31:21,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:21,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859047551] [2024-06-28 02:31:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:21,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:21,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859047551] [2024-06-28 02:31:21,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859047551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:21,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161451074] [2024-06-28 02:31:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:21,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:21,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 388 transitions, 6274 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:21,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:21,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:21,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:23,274 INFO L124 PetriNetUnfolderBase]: 8045/11911 cut-off events. [2024-06-28 02:31:23,274 INFO L125 PetriNetUnfolderBase]: For 572306/572306 co-relation queries the response was YES. [2024-06-28 02:31:23,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96235 conditions, 11911 events. 8045/11911 cut-off events. For 572306/572306 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 71849 event pairs, 1969 based on Foata normal form. 36/11938 useless extension candidates. Maximal degree in co-relation 96133. Up to 9787 conditions per place. [2024-06-28 02:31:23,415 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 409 selfloop transitions, 45 changer transitions 0/463 dead transitions. [2024-06-28 02:31:23,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 463 transitions, 8042 flow [2024-06-28 02:31:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:31:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:31:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-28 02:31:23,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-28 02:31:23,417 INFO L175 Difference]: Start difference. First operand has 209 places, 388 transitions, 6274 flow. Second operand 7 states and 226 transitions. [2024-06-28 02:31:23,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 463 transitions, 8042 flow [2024-06-28 02:31:24,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 463 transitions, 7891 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:31:24,898 INFO L231 Difference]: Finished difference. Result has 214 places, 396 transitions, 6381 flow [2024-06-28 02:31:24,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=214, PETRI_TRANSITIONS=396} [2024-06-28 02:31:24,899 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 162 predicate places. [2024-06-28 02:31:24,899 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 396 transitions, 6381 flow [2024-06-28 02:31:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:24,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:24,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:24,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:31:24,900 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:24,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1451694288, now seen corresponding path program 2 times [2024-06-28 02:31:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:24,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327094474] [2024-06-28 02:31:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:24,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327094474] [2024-06-28 02:31:24,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327094474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:24,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:24,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:24,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124137670] [2024-06-28 02:31:24,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:24,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:25,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:25,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 396 transitions, 6381 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:25,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:25,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:25,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:26,869 INFO L124 PetriNetUnfolderBase]: 8322/12312 cut-off events. [2024-06-28 02:31:26,870 INFO L125 PetriNetUnfolderBase]: For 616901/616901 co-relation queries the response was YES. [2024-06-28 02:31:27,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100909 conditions, 12312 events. 8322/12312 cut-off events. For 616901/616901 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 74808 event pairs, 2189 based on Foata normal form. 42/12341 useless extension candidates. Maximal degree in co-relation 100806. Up to 11052 conditions per place. [2024-06-28 02:31:27,334 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 387 selfloop transitions, 44 changer transitions 0/440 dead transitions. [2024-06-28 02:31:27,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 440 transitions, 7649 flow [2024-06-28 02:31:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:31:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:31:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-28 02:31:27,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209912536443148 [2024-06-28 02:31:27,336 INFO L175 Difference]: Start difference. First operand has 214 places, 396 transitions, 6381 flow. Second operand 7 states and 213 transitions. [2024-06-28 02:31:27,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 440 transitions, 7649 flow [2024-06-28 02:31:28,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 440 transitions, 7513 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 02:31:28,665 INFO L231 Difference]: Finished difference. Result has 218 places, 398 transitions, 6401 flow [2024-06-28 02:31:28,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6401, PETRI_PLACES=218, PETRI_TRANSITIONS=398} [2024-06-28 02:31:28,666 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2024-06-28 02:31:28,666 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 398 transitions, 6401 flow [2024-06-28 02:31:28,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:28,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:28,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:28,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:31:28,666 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:28,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:28,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1451546418, now seen corresponding path program 3 times [2024-06-28 02:31:28,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:28,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39082337] [2024-06-28 02:31:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:28,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:28,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39082337] [2024-06-28 02:31:28,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39082337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:28,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:28,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:31:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764179563] [2024-06-28 02:31:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:31:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:31:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:31:28,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:28,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 398 transitions, 6401 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:28,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:28,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:28,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:31,063 INFO L124 PetriNetUnfolderBase]: 8830/13080 cut-off events. [2024-06-28 02:31:31,063 INFO L125 PetriNetUnfolderBase]: For 670113/670113 co-relation queries the response was YES. [2024-06-28 02:31:31,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107234 conditions, 13080 events. 8830/13080 cut-off events. For 670113/670113 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80529 event pairs, 2287 based on Foata normal form. 36/13107 useless extension candidates. Maximal degree in co-relation 107130. Up to 11193 conditions per place. [2024-06-28 02:31:31,202 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 399 selfloop transitions, 45 changer transitions 0/453 dead transitions. [2024-06-28 02:31:31,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 453 transitions, 7892 flow [2024-06-28 02:31:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:31:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:31:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-28 02:31:31,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355685131195336 [2024-06-28 02:31:31,203 INFO L175 Difference]: Start difference. First operand has 218 places, 398 transitions, 6401 flow. Second operand 7 states and 218 transitions. [2024-06-28 02:31:31,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 453 transitions, 7892 flow [2024-06-28 02:31:32,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 453 transitions, 7771 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:31:32,438 INFO L231 Difference]: Finished difference. Result has 221 places, 403 transitions, 6500 flow [2024-06-28 02:31:32,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6500, PETRI_PLACES=221, PETRI_TRANSITIONS=403} [2024-06-28 02:31:32,439 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-28 02:31:32,439 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 403 transitions, 6500 flow [2024-06-28 02:31:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:32,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:31:32,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:31:32,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:31:32,439 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 02:31:32,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:31:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1021139242, now seen corresponding path program 1 times [2024-06-28 02:31:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:31:32,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079645980] [2024-06-28 02:31:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:31:32,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:31:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:31:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:31:32,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:31:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079645980] [2024-06-28 02:31:32,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079645980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:31:32,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:31:32,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:31:32,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544865497] [2024-06-28 02:31:32,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:31:32,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:31:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:31:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:31:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:31:32,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-28 02:31:32,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 403 transitions, 6500 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:31:32,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:31:32,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-28 02:31:32,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:31:34,808 INFO L124 PetriNetUnfolderBase]: 8837/13101 cut-off events. [2024-06-28 02:31:34,808 INFO L125 PetriNetUnfolderBase]: For 669886/669886 co-relation queries the response was YES. [2024-06-28 02:31:34,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108958 conditions, 13101 events. 8837/13101 cut-off events. For 669886/669886 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80674 event pairs, 2396 based on Foata normal form. 1/13098 useless extension candidates. Maximal degree in co-relation 108852. Up to 12162 conditions per place. [2024-06-28 02:31:34,985 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 408 selfloop transitions, 20 changer transitions 0/437 dead transitions. [2024-06-28 02:31:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 437 transitions, 7835 flow [2024-06-28 02:31:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:31:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:31:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-28 02:31:34,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:31:34,986 INFO L175 Difference]: Start difference. First operand has 221 places, 403 transitions, 6500 flow. Second operand 5 states and 147 transitions. [2024-06-28 02:31:34,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 437 transitions, 7835 flow